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1,914,235 | Shopify Là Gì? Cách Tạo Website Bán Hàng Miễn Phí Với Shopify | Shopify là một nền tảng thương mại điện tử cho phép người dùng tạo và quản lý cửa hàng trực tuyến dễ... | 0 | 2024-07-07T03:59:27 | https://dev.to/terus_technique/shopify-la-gi-cach-tao-website-ban-hang-mien-phi-voi-shopify-1ckk | website, digitalmarketing, seo, terus |
Shopify là một nền tảng thương mại điện tử cho phép người dùng tạo và quản lý cửa hàng trực tuyến dễ dàng. Nó là một giải pháp toàn diện, cung cấp các công cụ và tính năng cần thiết để xây dựng, vận hành và quản lý một cửa hàng trực tuyến chuyên nghiệp. Hàng triệu doanh nghiệp trên toàn thế giới đang sử dụng Shopify để bán sản phẩm và dịch vụ của họ trực tuyến.
Shopify cung cấp nhiều gói đăng ký khác nhau, bắt đầu từ $29/tháng. Ngoài ra, còn có các chi phí khác như phí giao dịch, phí chủ đề, ứng dụng bổ sung...
Shopify thích hợp với các doanh nghiệp vừa và nhỏ, các cửa hàng bán lẻ, các thương hiệu đang phát triển, các nhà bán lẻ đa kênh... Những đối tượng này thường không có đội ngũ kỹ thuật lớn và cần một giải pháp dễ sử dụng, triển khai nhanh.
Quá trình tạo [website bán hàng](https://terusvn.com/thiet-ke-website-tai-hcm/) trên Shopify bao gồm các bước cơ bản như: Tạo tài khoản, đăng ký tên miền, thiết lập cửa hàng, cài đặt giao diện, sản phẩm, thanh toán và vận chuyển...
Ngoài việc tự tạo website bán hàng trên Shopify, bạn cũng có thể tìm đến các [dịch vụ thiết kế website chuyên nghiệp](https://terusvn.com/thiet-ke-website-tai-hcm/) như Terus để được tư vấn và hỗ trợ toàn diện.
Shopify là một công cụ mạnh mẽ và dễ sử dụng để xây dựng và vận hành cửa hàng trực tuyến. Nó phù hợp với nhiều loại hình kinh doanh khác nhau, đặc biệt là các doanh nghiệp vừa và nhỏ. Chỉ với vài thao tác đơn giản, bạn đã có thể tạo ra một cửa hàng trực tuyến chuyên nghiệp và bắt đầu bán hàng ngay.
Tìm hiểu thêm về [Shopify Là Gì? Cách Tạo Website Bán Hàng Miễn Phí Với Shopify](https://terusvn.com/thiet-ke-website/shopify-la-gi/)
Digital Marketing:
· [Dịch vụ Facebook Ads](https://terusvn.com/digital-marketing/dich-vu-facebook-ads-tai-terus/)
· [Dịch vụ Google Ads](https://terusvn.com/digital-marketing/dich-vu-quang-cao-google-tai-terus/)
· [Dịch vụ SEO Tổng Thể](https://terusvn.com/seo/dich-vu-seo-tong-the-uy-tin-hieu-qua-tai-terus/)
Thiết kế website:
· [Dịch vụ Thiết kế website chuẩn Insight](https://terusvn.com/thiet-ke-website/dich-vu-thiet-ke-website-chuan-insight-chuyen-nghiep-uy-tin-tai-terus/)
· [Dịch vụ Thiết kế website](https://terusvn.com/thiet-ke-website-tai-hcm/) | terus_technique |
1,914,234 | WooCommerce Là Gì? Thông Tin Bạn Cần Biết Về WooCommerce | WooCommerce là một plugin miễn phí và mã nguồn mở để xây dựng các website thương mại điện tử, được... | 0 | 2024-07-07T03:56:43 | https://dev.to/terus_technique/woocommerce-la-gi-thong-tin-ban-can-biet-ve-woocommerce-26ld | website, digitalmarketing, seo, terus |
WooCommerce là một plugin miễn phí và mã nguồn mở để xây dựng các [website thương mại điện tử](https://terusvn.com/thiet-ke-website-tai-hcm/), được phát triển bởi Automattic, công ty đứng sau nền tảng WordPress. Với sự phổ biến của WordPress, WooCommerce đã trở thành một trong những giải pháp thương mại điện tử phổ biến nhất trên thế giới, được sử dụng bởi hàng triệu website.
Sự phổ biến của WooCommerce có thể được giải thích bởi nhiều yếu tố. Đầu tiên, việc tích hợp sẵn vào nền tảng WordPress đã giúp WooCommerce dễ dàng tiếp cận được với đông đảo người dùng WordPress, những người đang tìm kiếm giải pháp bán hàng trực tuyến. Bên cạnh đó, WooCommerce cung cấp một giao diện người dùng thân thiện, dễ sử dụng, phù hợp cả với các chủ cửa hàng không có nhiều kinh nghiệm công nghệ.
Một yếu tố khác khiến WooCommerce trở nên phổ biến là sự linh hoạt và tính mở rộng của nó. Plugin này cho phép người dùng tùy chỉnh và mở rộng các tính năng theo nhu cầu kinh doanh thông qua hàng nghìn plugin và chủ đề bổ sung. Điều này giúp các chủ cửa hàng có thể xây dựng một giải pháp thương mại điện tử hoàn toàn phù hợp với yêu cầu của mình.
Về lợi ích, WooCommerce mang lại nhiều giá trị cho các chủ cửa hàng trực tuyến. Trước hết, nó giúp tạo ra các [trang web thương mại điện tử chuyên nghiệp](https://terusvn.com/thiet-ke-website-tai-hcm/), với các tính năng như quản lý sản phẩm, thanh toán, vận chuyển và nhiều tính năng khác. Bên cạnh đó, WooCommerce cung cấp các công cụ tiếp thị và phân tích để tối ưu hóa trải nghiệm khách hàng và tăng doanh thu.
Để cài đặt WooCommerce, người dùng chỉ cần tải plugin về và kích hoạt trên nền tảng WordPress. Sau đó, các tùy chỉnh và cấu hình có thể được thực hiện thông qua giao diện quản trị. Sử dụng các sản phẩm WooCommerce cũng tương đối đơn giản, với các tính năng như thêm, sửa, xóa sản phẩm, quản lý đơn hàng và thanh toán.
Để tối ưu hóa và tăng doanh thu bán hàng trên WooCommerce, các chủ cửa hàng có thể áp dụng các chiến lược như sử dụng email marketing, quảng cáo video, tích hợp đa ngôn ngữ, tạo danh sách yêu thích và sử dụng các plugin bổ sung.
WooCommerce là một giải pháp thương mại điện tử toàn diện, linh hoạt và dễ sử dụng, phù hợp với nhiều loại hình kinh doanh trực tuyến. Với sự phổ biến và sự hỗ trợ của cộng đồng, WooCommerce đang ngày càng khẳng định vị thế là một trong những nền tảng thương mại điện tử hàng đầu trên thế giới.
Tìm hiểu thêm về [WooCommerce Là Gì? Thông Tin Bạn Cần Biết Về WooCommerce](https://terusvn.com/thiet-ke-website/woocommerce-la-gi/)
Digital Marketing:
· [Dịch vụ Facebook Ads](https://terusvn.com/digital-marketing/dich-vu-facebook-ads-tai-terus/)
· [Dịch vụ Google Ads](https://terusvn.com/digital-marketing/dich-vu-quang-cao-google-tai-terus/)
· [Dịch vụ SEO Tổng Thể](https://terusvn.com/seo/dich-vu-seo-tong-the-uy-tin-hieu-qua-tai-terus/)
Thiết kế website:
· [Dịch vụ Thiết kế website chuẩn Insight](https://terusvn.com/thiet-ke-website/dich-vu-thiet-ke-website-chuan-insight-chuyen-nghiep-uy-tin-tai-terus/)
· [Dịch vụ Thiết kế website](https://terusvn.com/thiet-ke-website-tai-hcm/) | terus_technique |
1,914,233 | Website Bán Hàng Là Gì? Lợi Ích Và Vai Trò của Website Bán Hàng | Website bán hàng là một nền tảng trực tuyến được doanh nghiệp sử dụng để trưng bày và bán các sản... | 0 | 2024-07-07T03:52:12 | https://dev.to/terus_technique/website-ban-hang-la-gi-loi-ich-va-vai-tro-cua-website-ban-hang-16bp | website, digitalmarketing, seo, terus |
Website bán hàng là một nền tảng trực tuyến được doanh nghiệp sử dụng để trưng bày và bán các sản phẩm hoặc dịch vụ của mình. Đây là một kênh bán hàng hiệu quả, giúp doanh nghiệp tiếp cận được với số lượng khách hàng tiềm năng lớn, gia tăng doanh thu và xây dựng hình ảnh chuyên nghiệp. Website bán hàng cung cấp cho khách hàng trải nghiệm mua sắm tiện lợi, an toàn và nhanh chóng.
Tầm quan trọng của website bán hàng đối với việc kinh doanh
Tiếp cận nguồn khách hàng khổng lồ: Website bán hàng giúp doanh nghiệp mở rộng phạm vi tiếp cận với khách hàng trên toàn cầu, vượt qua những giới hạn về địa lý của cửa hàng truyền thống.
Gia tăng doanh thu hiệu quả: Việc bán hàng trực tuyến giúp doanh nghiệp tiết kiệm chi phí vận hành, tăng biên lợi nhuận và gia tăng doanh thu.
Thể hiện hình ảnh chuyên nghiệp: Một website bán hàng chuyên nghiệp, thẩm mỹ và dễ sử dụng sẽ góp phần nâng cao hình ảnh và uy tín của doanh nghiệp.
Chi phí xây dựng và duy trì tiết kiệm: So với việc vận hành cửa hàng truyền thống, chi phí xây dựng và duy trì website bán hàng thường thấp hơn rất nhiều.
Lợi ích của việc sử dụng [dịch vụ thiết kế website bán hàng](https://terusvn.com/thiet-ke-website-tai-hcm/)
Thúc đẩy doanh số bán hàng, gia tăng doanh thu: Việc bán hàng trực tuyến giúp doanh nghiệp tiếp cận và phục vụ nhiều khách hàng hơn, từ đó gia tăng doanh số và doanh thu.
Không giới hạn thời gian: Website bán hàng hoạt động liên tục 24/7, cho phép khách hàng mua sắm bất cứ lúc nào, không bị giới hạn bởi giờ làm việc của cửa hàng.
Xây dựng hình ảnh doanh nghiệp/thương hiệu uy tín: Một website bán hàng chuyên nghiệp sẽ góp phần nâng cao hình ảnh và uy tín của doanh nghiệp.
Chi phí xây dựng và vận hành hợp lý, tiết kiệm: So với cửa hàng truyền thống, chi phí xây dựng và vận hành website bán hàng thường thấp hơn rất nhiều.
Trong thời đại kinh tế số, việc sở hữu một website bán hàng hiện đại, tối ưu trải nghiệm người dùng là yếu tố then chốt để doanh nghiệp có thể cạnh tranh và phát triển bền vững.
Terus cung cấp [dịch vụ thiết kế website bán hàng chuyên nghiệp](https://terusvn.com/thiet-ke-website-tai-hcm/), đáp ứng yêu cầu kinh doanh của từng doanh nghiệp. Các website được xây dựng với các tính năng hiện đại, dễ sử dụng và tối ưu trải nghiệm người dùng.
Tìm hiểu thêm về [Website Bán Hàng Là Gì? Lợi Ích Và Vai Trò của Website Bán Hàng](https://terusvn.com/thiet-ke-website/website-ban-hang-la-gi/)
Digital Marketing:
· [Dịch vụ Facebook Ads](https://terusvn.com/digital-marketing/dich-vu-facebook-ads-tai-terus/)
· [Dịch vụ Google Ads](https://terusvn.com/digital-marketing/dich-vu-quang-cao-google-tai-terus/)
· [Dịch vụ SEO Tổng Thể](https://terusvn.com/seo/dich-vu-seo-tong-the-uy-tin-hieu-qua-tai-terus/)
Thiết kế website:
· [Dịch vụ Thiết kế website chuẩn Insight](https://terusvn.com/thiet-ke-website/dich-vu-thiet-ke-website-chuan-insight-chuyen-nghiep-uy-tin-tai-terus/)
· [Dịch vụ Thiết kế website](https://terusvn.com/thiet-ke-website-tai-hcm/) | terus_technique |
1,914,232 | React + Next.js + tailwind Github pages | Step 1. Set Up Your Next.js Project 1-0. Initialize Your Next.js Project: $ npx... | 0 | 2024-07-07T03:50:19 | https://dev.to/sidcodeme/react-nextjs-tailwind-github-pages-4hek | react, nextjs, github, tailwindcss | ### Step 1. Set Up Your Next.js Project
**1-0. Initialize Your Next.js Project:**
```bash
$ npx create-next-app@latest
```
**1-1. had domain**
```bash
$ cd my_project_directory
$ echo -e 'sidcode.me' > public/CNAME
$ cat public/CNAME
sidcode.me
```
**1-2. Update `next.config.js` or `next.config.mjs`**
```jsx
/** @type {import('next').NextConfig} */
const nextConfig = {
output: 'export',
images: {
unoptimized: true,
},
reactStrictMode: true,
assetPrefix: '.',
};
export default nextConfig;
```
**1-3. Update `postcss.config.js` or `postcss.config.mjs`**
```jsx
/** @type {import('postcss-load-config').Config} */
const config = {
plugins: {
tailwindcss: {},
autoprefixer: {},
},
};
export default config;
```
**1-3-1**. autoprefixer install
```bash
$ npm install autoprefixer --save-dev
```
**1-4.** **Github**
```bash
git init
git add .
git commit -m "Initial commit"
git remote add origin https://<id>:<token>@github.com/<username>/<repo>.git
git push -u origin master
```
### Step 2: Deploy to GitHub Pages
**2-1. Install `gh-pages`:** Install the `gh-pages` package to help deploy your app:
```bash
$ npm install --save-dev gh-pages
```
**2-2. Update `package.json`:** Add the following scripts to your `package.json`:
```json
"scripts": {
"dev": "next dev",
"start": "next start",
"lint": "next lint",
"build": "next build",
"deploy": "touch out/.nojekyll && gh-pages -d out -t true",
"deploy-npm": "npm run build && npm run deploy"
},
// "deploy": "gh-pages -d out -f" // one time force / 안될때 1회성
```
**2-3. Deploy Your App:** Run the following command to deploy your app to GitHub Pages:
```bash
$ npm run deploy-npm
```
**Like this!**
| sidcodeme |
1,914,231 | React + Next.js + tailwind Github pages | Step 1. Set Up Your Next.js Project 1-0. had domain $ cd my_flutter_directory $ echo -e... | 0 | 2024-07-07T03:50:18 | https://dev.to/sidcodeme/react-nextjs-tailwind-github-pages-49d4 | react, nextjs, github, tailwindcss | ### Step 1. Set Up Your Next.js Project
**1-0. had domain**
```bash
$ cd my_flutter_directory
$ echo -e 'sidcode.me' > public/CNAME
$ cat public/CNAME
sidcode.me
```
**1-1. Initialize Your Next.js Project:**
```bash
$ npx create-next-app@latest
```
**1-2. Update `next.config.js` or `next.config.mjs`**
```jsx
/** @type {import('next').NextConfig} */
const nextConfig = {
output: 'export',
images: {
unoptimized: true,
},
reactStrictMode: true,
assetPrefix: '.',
};
export default nextConfig;
```
**1-3. Update `postcss.config.js` or `postcss.config.mjs`**
```jsx
/** @type {import('postcss-load-config').Config} */
const config = {
plugins: {
tailwindcss: {},
autoprefixer: {},
},
};
export default config;
```
**1-3-1**. autoprefixer install
```bash
$ npm install autoprefixer --save-dev
```
**1-4.** **Github**
```bash
git init
git add .
git commit -m "Initial commit"
git remote add origin https://<id>:<token>@github.com/<username>/<repo>.git
git push -u origin master
```
### Step 2: Deploy to GitHub Pages
**2-1. Install `gh-pages`:** Install the `gh-pages` package to help deploy your app:
```bash
$ npm install --save-dev gh-pages
```
**2-2. Update `package.json`:** Add the following scripts to your `package.json`:
```json
"scripts": {
"dev": "next dev",
"start": "next start",
"lint": "next lint",
"build": "next build",
"deploy": "touch out/.nojekyll && gh-pages -d out -t true",
"deploy-npm": "npm run build && npm run deploy"
},
// "deploy": "gh-pages -d out -f" // one time force / 안될때 1회성
```
**2-3. Deploy Your App:** Run the following command to deploy your app to GitHub Pages:
```bash
$ npm run deploy-npm
```
**Like this!**
| sidcodeme |
1,914,228 | Exploring the Power of `useSignal` in React | Introduction React is constantly evolving, and with each new version, we get more hooks... | 0 | 2024-07-07T03:48:33 | https://dev.to/vyan/exploring-the-power-of-usesignal-in-react-2aao | webdev, javascript, beginners, react | ## Introduction
React is constantly evolving, and with each new version, we get more hooks and features that make our lives as developers easier. One of the lesser-known but highly useful hooks is `useSignal`. In this blog post, we will dive deep into what `useSignal` is, how it works, and how you can use it to improve your React applications.
---
## What is `useSignal`?
`useSignal` is a custom hook that allows you to create a simple, signal-based state in your React components. Unlike the traditional state managed by `useState`, signals can be used to trigger effects in a more declarative and concise manner. This can be particularly useful for handling side effects, animations, or any scenario where you need a straightforward way to signal changes.
---
## Why Use `useSignal`?
### Simplicity
Signals are easy to create and use, providing a cleaner way to manage state changes and side effects.
### Performance
Signal-based updates can be more efficient as they reduce unnecessary re-renders.
### Declarative Code
Using signals can lead to more declarative and readable code, making it easier to understand and maintain.
---
## How to Use `useSignal`
To start using `useSignal`, you first need to create the hook and then use it within your component. Let’s walk through an example to illustrate this.
### Creating the Signal Hook
```javascript
import { useState, useEffect, useCallback } from 'react';
const useSignal = (initialValue) => {
const [value, setValue] = useState(initialValue);
const signal = useCallback(() => {
setValue((prevValue) => !prevValue);
}, []);
return [value, signal];
};
export default useSignal;
```
### Using `useSignal` in a Component
Let’s create a component that uses the `useSignal` hook to toggle a value and trigger a side effect.
```javascript
import React, { useEffect } from 'react';
import useSignal from './useSignal';
const SignalComponent = () => {
const [isActive, toggleActive] = useSignal(false);
useEffect(() => {
if (isActive) {
console.log('Signal is active!');
} else {
console.log('Signal is inactive.');
}
}, [isActive]);
return (
<div>
<p>The signal is {isActive ? 'active' : 'inactive'}</p>
<button onClick={toggleActive}>Toggle Signal</button>
</div>
);
};
export default SignalComponent;
```
### In this example:
1. We create a `useSignal` hook that returns the current value and a function to toggle this value.
2. Inside `SignalComponent`, we use the `useSignal` hook to manage our signal state.
3. The `useEffect` hook listens for changes to `isActive` and logs a message whenever it toggles.
---
## Benefits in Real Applications
Using `useSignal` can be particularly beneficial in real-world applications where you need a straightforward way to trigger updates without the complexity of managing multiple state variables. For example:
### Animations
Easily trigger and control animations.
### API Calls
Signal when to fetch or refetch data.
### Conditional Rendering
Simplify the logic for showing/hiding components based on a signal.
---
## Conclusion
`useSignal` is a powerful yet simple hook that can streamline state management and effect handling in your React applications. By leveraging signals, you can write more declarative, efficient, and maintainable code. Give it a try in your next project and see how it can simplify your state management!
---
If you found this guide helpful, feel free to share it with others and save it for future reference. Stay tuned for more insightful articles on React and web development!
---
## Additional Resources
For more information on React hooks and state management, check out the following resources:
- [React Documentation](https://reactjs.org/docs/hooks-intro.html)
- [Advanced React Patterns](https://reactpatterns.com/)
- [State Management in React](https://blog.logrocket.com/state-management-react-hooks-context-api/)
| vyan |
1,914,227 | Xây Dựng Hệ Thống Chăm Sóc Khách Hàng Chuyên Nghiệp | Trong thời đại công nghệ số, việc xây dựng hệ thống chăm sóc khách hàng trực tuyến trở nên vô cùng... | 0 | 2024-07-07T03:48:08 | https://dev.to/terus_technique/xay-dung-he-thong-cham-soc-khach-hang-chuyen-nghiep-1fpo | website, digitalmarketing, seo, terus |
Trong thời đại công nghệ số, việc xây dựng hệ thống chăm sóc khách hàng trực tuyến trở nên vô cùng quan trọng. Ngày càng có nhiều người tiêu dùng sử dụng các thiết bị điện tử để mua sắm và tìm kiếm thông tin. Một hệ thống chăm sóc khách hàng hiệu quả giúp doanh nghiệp tạo ra trải nghiệm tích cực cho khách hàng, từ đó xây dựng được mối quan hệ lâu dài và tăng tỷ lệ khách hàng quay lại.
Cách xây dựng [hệ thống chăm sóc khách hàng online](https://terusvn.com/thiet-ke-website-tai-hcm/):
Có chuyên môn cao về sản phẩm và dịch vụ: Đội ngũ nhân viên chăm sóc khách hàng cần có kiến thức chuyên sâu về sản phẩm, dịch vụ của doanh nghiệp. Điều này giúp họ có thể trả lời những câu hỏi của khách hàng một cách chính xác và chi tiết.
Tôn trọng thời gian của khách hàng bằng trả lời nhanh: Khách hàng luôn mong muốn được phản hồi nhanh chóng khi có yêu cầu. Doanh nghiệp nên đặt mục tiêu trả lời tối đa 24h đối với các câu hỏi, phản hồi của khách hàng.
Trò chuyện video qua các cuộc hội thảo online: Tổ chức các buổi hội thảo, giao lưu trực tuyến giúp doanh nghiệp tương tác trực tiếp với khách hàng. Đây là cách để lắng nghe ý kiến, phản hồi của họ, đồng thời giải đáp thắc mắc.
Lên kịch bản câu hỏi và trả lời trên website: Doanh nghiệp nên xây dựng một kho câu hỏi thường gặp và câu trả lời tương ứng. Điều này giúp khách hàng dễ dàng tìm thấy thông tin cần thiết mà không cần liên hệ trực tiếp.
[SEO website](https://terusvn.com/thiet-ke-website-tai-hcm/) để kết nối truyền thông xã hội: Ứng dụng các kỹ thuật SEO để nâng cao khả năng hiển thị của website trên các công cụ tìm kiếm. Kết hợp với việc xây dựng tương tác trên các nền tảng mạng xã hội.
Xây dựng hệ thống chăm sóc khách hàng hiệu quả là một yếu tố quan trọng để doanh nghiệp tạo dựng mối quan hệ lâu dài và tăng tỷ lệ khách hàng quay lại. Tìm hiểu thêm về [Xây Dựng Hệ Thống Chăm Sóc Khách Hàng Chuyên Nghiệp](https://terusvn.com/thiet-ke-website/xay-dung-he-thong-cham-soc-khach-hang/)
Digital Marketing:
· [Dịch vụ Facebook Ads](https://terusvn.com/digital-marketing/dich-vu-facebook-ads-tai-terus/)
· [Dịch vụ Google Ads](https://terusvn.com/digital-marketing/dich-vu-quang-cao-google-tai-terus/)
· [Dịch vụ SEO Tổng Thể](https://terusvn.com/seo/dich-vu-seo-tong-the-uy-tin-hieu-qua-tai-terus/)
Thiết kế website:
· [Dịch vụ Thiết kế website chuẩn Insight](https://terusvn.com/thiet-ke-website/dich-vu-thiet-ke-website-chuan-insight-chuyen-nghiep-uy-tin-tai-terus/)
· [Dịch vụ Thiết kế website](https://terusvn.com/thiet-ke-website-tai-hcm/) | terus_technique |
1,914,226 | Dịch Vụ Thiết Kế Website Ngành Nghề Tại Terus | Với sự phát triển của công nghệ và sự thay đổi trong hành vi tiêu dùng của khách hàng, việc thiết kế... | 0 | 2024-07-07T03:44:35 | https://dev.to/terus_technique/dich-vu-thiet-ke-website-nganh-nghe-tai-terus-34po | website, seo, digitalmarketing, terus |
Với sự phát triển của công nghệ và sự thay đổi trong hành vi tiêu dùng của khách hàng, việc thiết kế website ngành nghề trở nên vô cùng quan trọng. Một website ngành nghề chuyên biệt có thể giúp doanh nghiệp quảng bá thương hiệu, tiếp cận khách hàng mục tiêu, tăng doanh số bán hàng, cải thiện dịch vụ khách hàng, tăng cường hiệu quả marketing, tiết kiệm chi phí, và nâng cao khả năng cạnh tranh.
Terus, một công ty chuyên về thiết kế và phát triển website, cung cấp [dịch vụ thiết kế website ngành nghề chuyên sâu](https://terusvn.com/thiet-ke-website-tai-hcm/). Terus có kinh nghiệm trong việc thiết kế website cho nhiều lĩnh vực khác nhau, bao gồm nội thất, thời trang, bất động sản, thẩm mỹ viện - spa, du lịch, giáo dục, và doanh nghiệp.
Khi thiết kế website ngành nghề, Terus tập trung vào các yếu tố quan trọng như giao diện thân thiện với người dùng, tính năng phù hợp với ngành nghề, tối ưu hóa SEO để nâng cao khả năng hiển thị trên các công cụ tìm kiếm, và tích hợp các công cụ quản lý nội dung và thống kê hiệu suất website. Điều này giúp doanh nghiệp có một website chuyên nghiệp, thu hút khách hàng, và nâng cao hiệu quả hoạt động kinh doanh.
Ngoài ra, Terus cũng cung cấp các dịch vụ bổ sung như digital marketing, giải pháp quản lý, và thiết kế phần mềm. Điều này giúp doanh nghiệp có thể tiếp cận khách hàng hiệu quả hơn, quản lý hoạt động kinh doanh tốt hơn, và tạo ra các giải pháp công nghệ phù hợp với nhu cầu của riêng mình.
Terus cam kết cung cấp [dịch vụ thiết kế website ngành nghề chất lượng cao](https://terusvn.com/thiet-ke-website-tai-hcm/), đáp ứng nhu cầu của từng khách hàng một cách cá nhân hóa. Terus sử dụng các công nghệ và quy trình tiên tiến để đảm bảo rằng website của khách hàng không chỉ đẹp mắt mà còn có tính năng và hiệu suất tối ưu.
Ngoài việc thiết kế website, Terus còn hỗ trợ khách hàng trong việc quản trị và bảo trì website, đảm bảo rằng website luôn hoạt động ổn định và cập nhật với các xu hướng mới nhất. Terus cung cấp các dịch vụ như lưu trữ website, bảo mật, cập nhật nội dung, và phân tích dữ liệu.
Dịch vụ thiết kế website ngành nghề tại Terus là một giải pháp toàn diện, giúp doanh nghiệp xây dựng một sự hiện diện trực tuyến chuyên nghiệp, thu hút khách hàng mục tiêu, và nâng cao hiệu quả hoạt động kinh doanh. Với đội ngũ chuyên gia, công nghệ tiên tiến, và cam kết chất lượng, Terus đang trở thành lựa chọn hàng đầu của các doanh nghiệp muốn tăng cường sức cạnh tranh trong kỷ nguyên số.
Tìm hiểu thêm về [Dịch Vụ Thiết Kế Website Ngành Nghề Tại Terus](https://terusvn.com/thiet-ke-website/dich-vu-thiet-ke-website-nganh-nghe/)
Digital Marketing:
· [Dịch vụ Facebook Ads](https://terusvn.com/digital-marketing/dich-vu-facebook-ads-tai-terus/)
· [Dịch vụ Google Ads](https://terusvn.com/digital-marketing/dich-vu-quang-cao-google-tai-terus/)
· [Dịch vụ SEO Tổng Thể](https://terusvn.com/seo/dich-vu-seo-tong-the-uy-tin-hieu-qua-tai-terus/)
Thiết kế website:
· [Dịch vụ Thiết kế website chuẩn Insight](https://terusvn.com/thiet-ke-website/dich-vu-thiet-ke-website-chuan-insight-chuyen-nghiep-uy-tin-tai-terus/)
· [Dịch vụ Thiết kế website](https://terusvn.com/thiet-ke-website-tai-hcm/) | terus_technique |
1,914,225 | Using Addgraph to Create a Neural Network | Creating a neural network diagram can be a complex task, but with the right tools, it can be made... | 0 | 2024-07-07T03:41:42 | https://dev.to/fridaymeng/using-addgraph-to-create-a-neural-network-8bg |
Creating a neural network diagram can be a complex task, but with the right tools, it can be made simpler and more efficient. Addgraph, a versatile diagramming tool, is perfect for this job. It supports various types of flowcharts and offers five different layout options along with two methods for adding elements to your diagram. In this article, we'll guide you through the process of creating a neural network using Addgraph.
### Why Use Addgraph?
Addgraph is designed to be user-friendly and highly customizable. Here are some reasons why it's an excellent choice for creating neural network diagrams:
- **Versatility:** It can handle a wide range of diagrams, including flowcharts, organizational charts, and more.
- **Multiple Layouts:** With five different layout options, you can choose the one that best fits your data presentation needs.
- **Easy Input Methods:** Addgraph offers two ways to add elements to your diagram, making it flexible for different user preferences.
### Step-by-Step Guide to Creating a Neural Network
#### Step 1: Access Addgraph
Go to [Addgraph](https://addgraph.com) and log in to your account. If you don't have an account, you can easily sign up for one.
#### Step 2: Select the Layout
Choose a layout that suits your neural network. Addgraph provides five layout options:
- **Vertical Tree**
- **Horizontal Tree**
- **Radial Tree**
- **Circular Layout**
- **Layered Layout**
For a neural network, the Layered Layout is often the most appropriate as it aligns with the typical structure of neural networks.
#### Step 3: Add Nodes and Connections
There are two ways to add nodes and connections in Addgraph:
1. **Using the GUI:**
- Click on the "Add Node" button to create new nodes.
- Use the "Connect" button to draw connections between nodes, representing the flow of information in your neural network.
2. **Using the Documentation Interface:**
- Navigate to [Addgraph Write](https://addgraph.com/write).
- Use the two input boxes provided: one for node names and one for connections using node indices.
- This method is useful for users who prefer a text-based input method.
For example:
- **Nodes:** Input the names of your nodes such as "Input Layer," "Hidden Layer 1," "Hidden Layer 2," and "Output Layer."
- **Connections:** Define the connections between these layers. For instance, connect "Input Layer" to "Hidden Layer 1," "Hidden Layer 1" to "Hidden Layer 2," and so on.
#### Step 4: Customize the Diagram
Addgraph allows you to customize the appearance of your diagram:
- **Colors:** Change the color of nodes and edges to improve clarity and visual appeal.
- **Labels:** Add labels to nodes and edges to provide more information.
- **Shapes:** Adjust the shapes of the nodes to differentiate between layers or types of neurons.
#### Step 5: Review and Export
Once you've completed your neural network diagram, review it for accuracy and completeness. Addgraph offers options to export your diagram in various formats, including PNG, PDF, and SVG. Choose the format that best suits your needs.
### Conclusion
Creating a neural network diagram can be straightforward with the right tool. Addgraph's flexibility, ease of use, and powerful features make it an excellent choice for visualizing complex neural networks. Whether you're a researcher, student, or professional, Addgraph can help you create clear and effective diagrams to enhance your work.
Give Addgraph a try today and see how it can simplify your diagramming tasks!
### Example Diagram
To illustrate, here’s a simple example of a neural network diagram created using Addgraph:
- **Input Layer:** Nodes representing input neurons.
- **Hidden Layers:** Multiple nodes connected in layers to represent the hidden neurons.
- **Output Layer:** Nodes representing output neurons.
Connections are drawn between these nodes to show the flow of information from the input layer, through the hidden layers, to the output layer.
By following these steps and utilizing Addgraph’s features, you can create detailed and professional neural network diagrams with ease. | fridaymeng |
|
1,914,219 | How strong are browsers for file Conversions | Introduction: The Need for Browser-Based Conversions File conversions are a common... | 0 | 2024-07-07T03:26:07 | https://dev.to/ajitsinghkaler/how-strong-are-browsers-for-file-conversions-245p | browser, javascript, typescript, webassembly | ## Introduction: The Need for Browser-Based Conversions
File conversions are a common necessity today. We frequently need to transform files from one format to another for various reasons:
- Compatibility: Different applications support different file formats.
- Size reduction: Some formats offer better compression for sharing or storage.
- Feature support: Certain formats provide additional features or metadata.
Traditionally, file conversions were handled by desktop applications or server-side processes. However, server-based conversions come with several significant drawbacks:
1. Privacy Concerns:
- Data Exposure: Uploading files to a server increases the risk of sensitive information leaking.
- Data Retention: We often have no control over how long their data is stored on the server or how it's used. People can use your data for AI training with the lack of high quality data.
- Trust Issues: We must trust the service provider not to misuse their data or fall victim to data breaches.
2. Lack of Control:
- Limited Customization: Server-based tools often offer one-size-fits-all solutions with limited customization options.
- Dependency on Service: We rely on the availability and reliability of the conversion service.
- Potential for Data Loss: Network issues during upload or download can result in data loss or corruption.
3. Speed and Bandwidth Limitations:
- Upload Time: Large files can take significant time to upload, especially on slower connections.
- Server Processing Time: High server load can lead to delays in processing.
- Download Time: Converted files need to be downloaded, adding more time to the process.
4. Costs and Limitations:
- Service Fees: Many online conversion tools charge fees, especially for larger files or frequent use.
- File Size Limits: Free services often impose strict limits on file sizes.
- Conversion Quotas: There may be restrictions on the number of conversions allowed.
Given these challenges, browser-based conversions offer several compelling advantages:
- Privacy: Files don't need to be uploaded to a server, reducing security risks.
- Control: We have full control over their data and the conversion process.
- Speed: Client-side processing can be faster, especially for large files.
- Offline capability: Conversions can work without an internet connection.
- Accessibility: We can convert files from any device with a modern web browser.
- Reduced server load: Processing happens on the user's device, saving server resources.
- Cost-effective: No need for expensive server infrastructure or bandwidth costs.
Browser-based conversions leverage the power of modern web technologies to perform complex file manipulations directly in the user's browser. This approach not only addresses the privacy and control issues associated with server-based conversions but also offers a more seamless and efficient user experience.
I think all the online converters doing server conversions should ditch the server conversions and give us browser based conversions as there is more control. Sometimes you need to convert sensitive documents and browser based conversions are a very safe way to do them.
Let's explore how modern web technologies enable these powerful in-browser conversions.
### JavaScript Example: Converting HEIC to JPEG
We'll start with a common use case: converting HEIC images (common in iOS devices) to the more widely supported JPEG format.
```javascript
import heic2any from 'heic2any';
async function convertHeicToJpeg(heicFile) {
try {
const jpegBlob = await heic2any({
blob: heicFile,
toType: 'image/jpeg',
quality: 0.8
});
return URL.createObjectURL(jpegBlob);
} catch (error) {
console.error('Conversion failed:', error);
}
}
```
Explanation:
We import the `heic2any` library, which handles the conversion.
The `convertHeicToJpeg` function is asynchronous, allowing non-blocking operation.
We use `heic2any` to convert the HEIC file to a JPEG blob.
The quality parameter (0.8) balances image quality and file size.
We create a URL for the resulting JPEG blob, which can be used to display or download the image.
Usage example:
```js
const fileInput = document.getElementById('fileInput');
fileInput.addEventListener('change', async (event) => {
const heicFile = event.target.files[0];
const jpegUrl = await convertHeicToJpeg(heicFile);
const img = document.createElement('img');
img.src = jpegUrl;
document.body.appendChild(img);
});
```
This code sets up a file input and displays the converted JPEG image when a HEIC file is selected.
### JavaScript Example: PDF to PNG Conversion
Next, let's look at converting a PDF page to a PNG image, which can be useful for previews or sharing.
```js
import * as pdfjsLib from 'pdfjs-dist';
async function convertPdfToImage(pdfFile, pageNumber = 1) {
const arrayBuffer = await pdfFile.arrayBuffer();
const pdf = await pdfjsLib.getDocument({ data: arrayBuffer }).promise;
const page = await pdf.getPage(pageNumber);
const scale = 1.5;
const viewport = page.getViewport({ scale });
const canvas = document.createElement('canvas');
const context = canvas.getContext('2d');
canvas.height = viewport.height;
canvas.width = viewport.width;
const renderContext = {
canvasContext: context,
viewport: viewport
};
await page.render(renderContext).promise;
return new Promise((resolve) => {
canvas.toBlob((blob) => {
resolve(URL.createObjectURL(blob));
}, 'image/png');
});
}
```
Explanation:
We use the pdf.js library to handle PDF parsing and rendering.
The function takes a PDF file and an optional page number.
We create a canvas element to render the PDF page.
The scale factor (1.5) determines the resolution of the output image.
After rendering the page to the canvas, we convert it to a PNG blob.
Finally, we create a URL for the PNG image.
This conversion is particularly useful for generating thumbnails or previews of PDF documents directly in the browser, improving user experience in document management systems or file sharing platforms.
### JavaScript Example: CSV to JSON Conversion
Converting CSV to JSON is a common task in data processing and analysis. Here's how we can do it in the browser:
```js
import Papa from 'papaparse';
function convertCsvToJson(csvFile) {
return new Promise((resolve, reject) => {
Papa.parse(csvFile, {
complete: (results) => {
const jsonData = results.data.map((row) => {
const obj = {};
results.meta.fields.forEach((field, index) => {
obj[field] = row[index];
});
return obj;
});
resolve(jsonData);
},
header: true,
error: (error) => {
reject(error);
}
});
});
}
```
Explanation:
We use the Papa Parse library, which is excellent for CSV parsing.
The header: true option tells Papa Parse to use the first row as field names.
We transform the parsed data into an array of objects, where each object represents a row.
The resulting JSON data can be easily manipulated or displayed in the browser.
This conversion is valuable for data analysis tools, allowing We to upload CSV files and work with the data in a more structured JSON format without server involvement.
### WebAssembly Example: WebP to PNG Conversion
WebAssembly allows us to use high-performance libraries compiled from languages like C or C++. Here's an example using libwebp:
```js
import { WEBP } from '@saschazar/wasm-webp';
let webpModule;
async function initWebPModule() {
webpModule = await WEBP();
}
async function convertWebPToPNG(webpFile) {
if (!webpModule) {
await initWebPModule();
}
const arrayBuffer = await webpFile.arrayBuffer();
const webpData = new Uint8Array(arrayBuffer);
const { width, height } = webpModule.getInfo(webpData);
const rgbaData = webpModule.decode(webpData);
const canvas = document.createElement('canvas');
canvas.width = width;
canvas.height = height;
const ctx = canvas.getContext('2d');
const imageData = ctx.createImageData(width, height);
imageData.data.set(rgbaData);
ctx.putImageData(imageData, 0, 0);
return new Promise((resolve) => {
canvas.toBlob((blob) => {
resolve(URL.createObjectURL(blob));
}, 'image/png');
});
}
```
Explanation:
We use a WebAssembly module wrapping libwebp for high-performance decoding.
The module is initialized asynchronously when needed.
We decode the WebP image to raw RGBA data using the WebAssembly module.
The decoded data is then drawn onto a canvas and converted to a PNG.
This WebAssembly-based conversion showcases how browsers can leverage native-speed libraries for complex tasks like image processing, providing performance comparable to desktop applications.
## Conclusion
Browser-based file conversions offer us the convenience of performing complex file manipulations without leaving their browser or installing additional software. This approach not only enhances user experience but also reduces server load and addresses privacy concerns by keeping sensitive data on the client-side.
As web technologies continue to evolve, we can expect even more powerful and diverse file conversion capabilities directly in the browser.
I also implemented a few browser based conversions in my website [HEIC Converter](onlineheicconvert.com) you can check it out. Once the website loads you can even turn off the internet still everything will work. | ajitsinghkaler |
1,914,223 | Mastering Kubernetes DaemonSets: Deploy Pods Across Your Cluster | In Kubernetes, a DaemonSet is a type of controller that ensures a copy of a pod is running on every node in the cluster. This lab will guide you through the process of creating a DaemonSet to run replicas of a pod on every node in the cluster. | 27,732 | 2024-07-07T03:24:21 | https://dev.to/labex/mastering-kubernetes-daemonsets-deploy-pods-across-your-cluster-881 | kubernetes, coding, programming, tutorial |
## Introduction
This article covers the following tech skills:
In Kubernetes, a DaemonSet is a type of controller that ensures a copy of a pod is running on every node in the cluster. This lab will guide you through the process of creating a DaemonSet to run replicas of a pod on every node in the cluster.
## Create a Pod
Create a simple pod that will be used as the template for the replicas. Create a file called `/home/labex/project/myapp-pod.yaml` with the following contents:
```yaml
apiVersion: v1
kind: Pod
metadata:
name: myapp-pod
spec:
containers:
- name: myapp-container
image: nginx
ports:
- containerPort: 80
```
Create the pod using the following command:
```shell
kubectl apply -f /home/labex/project/myapp-pod.yaml
```
## Create a Daemonset
Create a DaemonSet to run replicas of the `myapp-pod` on every node in the cluster. Create a file called `/home/labex/project/myapp-daemonset.yaml` with the following contents:
```yaml
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: myapp-daemonset
spec:
selector:
matchLabels:
app: myapp
template:
metadata:
labels:
app: myapp
spec:
containers:
- name: myapp-container
image: nginx
ports:
- containerPort: 80
```
This DaemonSet uses the `myapp-pod` as the template for the replicas and sets the `matchLabels` selector to `app: myapp` to ensure that the replicas are created on every node.
Create the DaemonSet using the following command:
```shell
kubectl apply -f /home/labex/project/myapp-daemonset.yaml
```
## Verify the Daemonset
Verify that the DaemonSet has been created and that replicas of the `myapp-pod` are running on every node. Use the following command to list the nodes in the cluster:
```shell
kubectl get nodes
```
Use the following command to list the pods created by the DaemonSet:
```shell
kubectl get pods -l app=myapp
```
You should see one pod for each node in the cluster.
## Update the Daemonset
Update the DaemonSet to change the image used by the `myapp-container`. Create a file called `/home/labex/project/myapp-daemonsett-update.yaml` with the following contents:
```yaml
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: myapp-daemonset
spec:
selector:
matchLabels:
app: myapp
template:
metadata:
labels:
app: myapp
spec:
containers:
- name: myapp-container
image: busybox
command: ["sleep", "3600"]
```
This updated DaemonSet changes the image used by the `myapp-container` to `busybox` and sets the command to `sleep 3600`.
Update the DaemonSet using the following command:
```shell
kubectl apply -f /home/labex/project/myapp-daemonset-update.yaml
```
Verify that the DaemonSet has been updated and that replicas of the `myapp-pod` are running with the new image. Use the following command to list the pods created by the DaemonSet:
```shell
kubectl get pods -l app=myapp
```
You should see new pods created with the updated image.
## Summary
In this lab, you learned how to use a DaemonSet in Kubernetes to run replicas of a pod on every node in the cluster.
---
## Want to learn more?
- 🚀 Practice [Running Pod with Daemonsets](https://labex.io/tutorials/kubernetes-running-pod-with-daemonsets-8454)
- 🌳 Learn the latest [Kubernetes Skill Trees](https://labex.io/skilltrees/kubernetes)
- 📖 Read More [Kubernetes Tutorials](https://labex.io/tutorials/category/kubernetes)
Join our [Discord](https://discord.gg/J6k3u69nU6) or tweet us [@WeAreLabEx](https://twitter.com/WeAreLabEx) ! 😄 | labby |
1,914,222 | OOP🚌 | 1. What is OOP? Object-Oriented Programming (OOP) is a programming paradigm based on the... | 0 | 2024-07-07T03:19:09 | https://dev.to/__khojiakbar__/oop-1lap | ### 1. What is OOP?
Object-Oriented Programming (OOP) is a programming paradigm based on the concept of "objects," which can contain data (in the form of properties) and code (in the form of methods). JavaScript supports OOP through prototypes and ES6 classes.
### 2. Basic Concepts
**Class:** A blueprint for creating objects (instances).
**Object:** An instance of a class.
**Constructor:** A special method for initializing new objects.
**Method:** A function defined inside a class.
**Inheritance:** A way for one class to extend another class.
**Encapsulation:** Keeping the details (state) of an object hidden from the outside world.
**Abstraction:** Simplifying complex systems by modeling classes appropriate to the problem and working at the most relevant level of inheritance.
**Polymorphism:** Using a single interface to represent different underlying forms (data types).
### 3. Creating a Class
In ES6, you can create a class using the class keyword.
```
class Animal {
constructor(name) {
this.name = name;
}
speak() {
console.log(`${this.name} makes a noise.`);
}
}
// Funny Example: A talking cat
class Cat extends Animal {
speak() {
console.log(`${this.name} says: Meow!`);
}
}
const fluffy = new Cat('Fluffy');
fluffy.speak(); // Fluffy says: Meow!
```
### 4. Encapsulation
Encapsulation is the practice of keeping the internal state of an object hidden and only allowing access through methods.
```
class SecretAgent {
#realName; // Private field
constructor(alias, realName) {
this.alias = alias;
this.#realName = realName;
}
revealIdentity() {
return `My real name is ${this.#realName}.`;
}
}
const bond = new SecretAgent('007', 'James Bond');
console.log(bond.alias); // 007
console.log(bond.revealIdentity()); // My real name is James Bond.
console.log(bond.#realName); // SyntaxError: Private field '#realName' must be declared in an enclosing class
```
### 5. Inheritance
Inheritance allows one class to inherit properties and methods from another class.
```
class Dog extends Animal {
speak() {
console.log(`${this.name} says: Woof!`);
}
}
const rex = new Dog('Rex');
rex.speak(); // Rex says: Woof!
```
### 6. Abstraction
Abstraction in programming means hiding the complex implementation details and showing only the necessary features of an object. It's like dealing with a simple interface without worrying about the complicated internal workings.
**1. Simple Example: Coffee Machine**
Think of a coffee machine. You press a button, and coffee comes out. You don't need to know how the machine heats the water, grinds the coffee beans, or mixes everything together. All those details are abstracted away.
Here's how this would look in JavaScript:
```
class CoffeeMachine {
makeCoffee() {
this.boilWater();
this.brewCoffee();
this.pourInCup();
console.log("Here's your coffee!");
}
boilWater() {
console.log("Boiling water...");
}
brewCoffee() {
console.log("Brewing coffee...");
}
pourInCup() {
console.log("Pouring coffee into cup...");
}
}
const myCoffeeMachine = new CoffeeMachine();
myCoffeeMachine.makeCoffee();
// Boiling water...
// Brewing coffee...
// Pouring coffee into cup...
// Here's your coffee!
```
In this example, the makeCoffee method provides a simple interface to make coffee, while the internal methods boilWater, brewCoffee, and pourInCup are hidden from the user.
### 2. Another Funny Example: Magic Show
Imagine a magician performing a trick. The audience only sees the magic trick but not the preparation and setup behind it.
```
class Magician {
performTrick() {
this.prepareProps();
this.doMagic();
this.hideProps();
console.log("Abracadabra! The trick is done!");
}
prepareProps() {
console.log("Preparing magic props...");
}
doMagic() {
console.log("Performing the magic trick...");
}
hideProps() {
console.log("Hiding magic props...");
}
}
const magician = new Magician();
magician.performTrick();
// Preparing magic props...
// Performing the magic trick...
// Hiding magic props...
// Abracadabra! The trick is done!
```
Here, the **performTrick** method provides a simple interface for performing a magic trick, while the internal methods **prepareProps**, **doMagic**, and **hideProps** are hidden from the audience.
### 7. Polymorphism
Polymorphism lets you use a single interface to interact with objects of different types.
```
class Animal {
constructor(name) {
this.name = name;
}
speak() {
console.log(`${this.name} makes a noise.`);
}
}
class Bird extends Animal {
speak() {
console.log(`${this.name} says: Tweet!`);
}
}
class Cat extends Animal {
speak() {
console.log(`${this.name} says: Meow!`);
}
}
```
### 8. Real-Life Funny Example
Let's create a simple game where different characters (like superheroes) perform actions.
```
class Superhero {
constructor(name, superpower) {
this.name = name;
this.superpower = superpower;
}
usePower() {
console.log(`${this.name} uses ${this.superpower}!`);
}
}
class SpiderMan extends Superhero {
usePower() {
console.log(`${this.name} shoots webs!`);
}
}
class IronMan extends Superhero {
usePower() {
console.log(`${this.name} fires repulsor beams!`);
}
}
const heroes = [new SpiderMan('Spider-Man'), new IronMan('Iron Man')];
heroes.forEach(hero => hero.usePower());
// Spider-Man shoots webs!
// Iron Man fires repulsor beams!
```
### Conclusion
OOP in JavaScript helps you structure your code more efficiently by using classes, objects, inheritance, encapsulation, abstraction, and polymorphism. These concepts make it easier to manage and scale your code, especially in large projects. And with some creativity, you can make learning these concepts a lot more fun!
| __khojiakbar__ |
|
1,914,220 | SEKABET ONLİNE GİRİŞ ADRESİ | SEKABET ONLİNE BAHİS SİTESİNİN ERİŞİM BİLGİLERİ SÜREKLİ OLARAK GÜNCELLENMEKTEDİR VE BU BÜYÜK BİR... | 0 | 2024-07-07T03:14:13 | https://dev.to/sekabet/sekabet-online-giris-adresi-2ogo | SEKABET ONLİNE BAHİS SİTESİNİN ERİŞİM BİLGİLERİ SÜREKLİ OLARAK GÜNCELLENMEKTEDİR VE BU BÜYÜK BİR PROBLEM TEŞKİ ETMEKTEDİR. KULLANICILARIN BU PROBLEMİNİ ÇÖZMEYE YÖNELİK OLARAK RESMİ BLOG ADRESİMİZDEN KESİNTİSİZ BİR ŞEKİLDE YENİ GÜNCEL GİRİŞ ADRESLERİNİ YAYINLAMAKTAYIZ. SİZDE SEKABET RESMİ WEB SİTESİNE ERİŞMEK İSTİYORSANIZ BLOĞUMUZDA YER ALAN GÜNCEL GİRİŞ 2024 YENİ LİNKE TIKLAYARAK SORUNSUZ BİR ŞEKİLDE SİTEYE GİRİŞ YAPABİLİR VE KAYIT OLUŞTURABİLİRSİNİZ.
<a href="https://matadorbetting.com">SEKABET GİRİŞ İÇİN TIKLA</a>
| sekabet |
|
1,911,194 | Using Apache Superset, a Powerful and Free Data Analysis Tool | Introduction Among data analysis tools, Apache Superset, provided as open-source software,... | 0 | 2024-07-07T03:00:00 | https://howtodevez.blogspot.com/2024/04/using-apache-superset-a-powerful-and-free-data-analysis-tool.html | datascience, beginners, devops, docker | Introduction
------------
Among data analysis tools, **Apache Superset**, provided as open-source software, is considered one of the best choices for deploying reports at a large scale efficiently and completely free of charge. In this article, I will guide you through installing, configuring Superset, and connecting data sources.
This application was initiated by **Maxime Beauchemin** (the creator of Apache Airflow) as a hackathon project when he was working at **Airbnb**, and it joined the **Apache Incubator** program in 2017.
Essentially, Superset's features are quite similar to other data analysis software, including:
* Creating and managing dashboards
* Supporting multiple database types: SQLite, PostgreSQL, MySQL, etc.
* Supporting direct querying
Installation and Configuration
------------------------------
Here, I will guide you through installing Superset using the following Docker command:
```sh
docker run -d -p {outside port}:{inside port} --name {container name} apache/superset
```
**Example:**
```sh
docker run -d -p 8080:8088 --name superset apache/superset
```
After the Superset Docker container is running, we access that container to run the command for initializing an account as follows:
```sh
docker exec -it superset superset fab create-admin --username {username} --firstname {firstname} --lastname {lastname} --email {email} --password {password}
```
**Example:**
```sh
docker exec -it superset superset fab create-admin --username admin --firstname Superset --lastname Admin --email [email protected] --password admin
```
Next, you run the following command to load some pre-existing examples:
```sh
docker exec -it superset superset load_examples
```
To start Superset:
```sh
docker exec -it superset superset init
```
After that, you can access **_http://localhost:8080_** to start using Superset. The result will have some example data that we loaded previously.
Connecting Data Sources
-----------------------
To analyze data, you first need to create a connection to the database source (such as Postgres, MySQL, etc.). The connection process is simple and similar to how typical data connection tools work. Here, I will guide you on how to connect to PostgreSQL. If you are not familiar with Postgres, you can refer to [this article to install and use PostgreSQL basics](https://howtodevez.blogspot.com/2024/03/installing-postgresql-with-docker.html).
First, access the page to create a new database connection.
Next, enter the **_SQLALCHEMY URI_** with the following structure:
```sh
postgresql://{username}:{password}@{host}:{port}/{database}
```
After successfully connecting, you can use the features that Apache Superset supports, such as creating Dashboards, creating charts (with support for many chart types and diverse customization capabilities), querying data, saving queries, and viewing query history.
Conclusion
----------
Apache Superset provides relatively comprehensive tools to support data analysis and visualization. It can embed query results into other applications, connect to various data sources, and, importantly, it is open-source and completely free.
Although it may not be comparable to powerful paid tools like **_Tableau_** or **_Power BI_** in some aspects, overall, Superset is a very worthwhile tool because it meets most data analysis and reporting needs.
_**What do you think? Leave a comment below!**_
**_If you found this content helpful, please visit [the original article on my blog](https://howtodevez.blogspot.com/2024/04/using-apache-superset-a-powerful-and-free-data-analysis-tool.html) to support the author and explore more interesting content._**
<a href="https://howtodevez.blogspot.com/2024/03/sitemap.html" target="_blank" rel="noreferrer"><img src="https://img.shields.io/badge/Blogger-FF5722?style=for-the-badge&logo=blogger&logoColor=white" width="36" height="36" alt="Blogspot" /></a><a href="https://dev.to/chauhoangminhnguyen" target="_blank" rel="noreferrer"><img src="https://img.shields.io/badge/dev.to-0A0A0A?style=for-the-badge&logo=dev.to&logoColor=white" width="36" height="36" alt="Dev.to" /></a><a href="https://www.facebook.com/profile.php?id=61557154776384" target="_blank" rel="noreferrer"><img src="https://img.shields.io/badge/Facebook-1877F2?style=for-the-badge&logo=facebook&logoColor=white" width="36" height="36" alt="Facebook" /></a><a href="https://x.com/DavidNguyenSE" target="_blank" rel="noreferrer"><img src="https://img.shields.io/badge/X-000000?style=for-the-badge&logo=x&logoColor=white" width="36" height="36" alt="X" /></a> | chauhoangminhnguyen |
1,914,218 | go88 | iGo88.pro - Đắm Chìm Trong Trò Chơi Bầu Cua Tuyệt Đỉnh iGo88.pro: Sân chơi game bài uy tín, an toàn,... | 0 | 2024-07-07T02:59:12 | https://dev.to/igo88pro/go88-n9l | webdev, javascript, beginners, programming | iGo88.pro - Đắm Chìm Trong Trò Chơi Bầu Cua Tuyệt Đỉnh iGo88.pro: Sân chơi game bài uy tín, an toàn, minh bạch. Luật chơi chuẩn, giao diện đẹp mắt, nạp rút tiền siêu tốc, tham gia ngay để nhận thưởng khủng! #go88 #go88pro #taigamgo88 Website: [https://igo88.pro/](https://igo88.pro/) Email: [email protected] Phone: +84 999 999 99 Địa chỉ: 20 P. Tôn Đức Thắng, Cát Linh, Đống Đa, Hà Nội, Việt Nam | igo88pro |
1,913,815 | Saving the planet with AWS: What you can do as a Cloud Architect | I ran a poll on LinkedIn to understand climate change awareness within our community, and the results... | 0 | 2024-07-07T02:49:43 | https://dev.to/aws-builders/saving-the-planet-with-aws-what-you-can-do-as-a-cloud-architect-1i2o | aws, climatechange, savetheworld, sustainablecloud | I ran a poll on LinkedIn to understand climate change awareness within our community, and the results showed that at least 50% of participants actually had an idea of what it's all about and may be conscious of the threat. This is very good, and what I want to do with this post is to amplify that awareness in our community.
**Climate Change is real** , and there's no doubt about that. However, if you haven't been alarmed by this issue before, let's discuss what climate change really means. According to the United Nations, climate change refers to long-term shifts in temperatures and weather patterns. These shifts can occur naturally, due to changes in the sun's activity or large volcanic eruptions. However, since the 1800s, human activities, primarily the burning of fossil fuels like coal, oil, and gas, have become the main drivers of climate change.
**Here are a few key points to consider:**
The Earth's average surface temperature is now 1.2°C warmer. Scientists believe that 1.5°C is the maximum temperature increase we can tolerate without significantly impacting our current livable conditions.
By the end of this century, a projected increase of 3.0°C could have lasting impacts on the way we live.
Impact for climate change when temperature increased:
**Within 2°C (1.5-2°C):**
- Health impacts include increased mortality and moderate risks from diseases like malaria.
- Ecosystem shifts affect up to 20% of global areas.
- Agriculture may see mixed impacts, with some regions benefiting initially.
- Water stress affects millions, particularly in already vulnerable regions.
- Major events like significant sea level rise become increasingly plausible.
**2°C to 2.5°C (2-2.5°C):**
- Health risks escalate, with the potential for significant increases in mortality and higher disease prevalence.
- Ecosystems face substantial shifts, impacting over 20% of global areas.
- Agriculture experiences declines in productivity, leading to food security challenges.
- Water scarcity severely impacts billions in water-stressed regions.
- Major events such as catastrophic sea level rise and extreme weather events become more likely.
**2.5 to 3°C (2.5°C - 3°C):**
- Severe health impacts include widespread mortality and outbreaks of diseases.
- Ecosystems undergo drastic shifts, potentially exceeding 20% of global areas.
- Agriculture sees widespread declines, doubling food deficit risks in many developing regions.
- Water stress intensifies, affecting billions globally.
- Major catastrophic events, including extreme sea level rise and system shutdowns, become highly probable.
A World Health Organization research shows that 3.6 billion people already live in areas highly susceptible to climate change, which is expected to cause approximately 250,000 additional deaths per year from undernutrition, malaria, diarrhea, and heat stress alone between 2030 and 2050
Now that you are aware of the potential impact of climate change, let's understand how humans are contributing to the climate change:
- Burning Fossil Fuels: When we use oil, gas, and coal for energy, they release gases that trap heat in the atmosphere, warming the planet.
- Cutting Down Trees: Removing forests for farming or building reduces the number of trees that absorb carbon dioxide, which can increase global warming.
- Factories and Industries: Manufacturing and industrial activities release gases and pollutants that contribute to climate change.
- Driving and Traveling: Cars, trucks, planes, and ships burn fuels that release carbon dioxide and other gases, contributing to climate change.
In the IT industry, running servers and workloads requires energy, much of which still comes from burning fossil fuels. When developing and deploying systems into production, the compute workloads contribute to our impact on climate change.
**Few data points related to ICT contribution**
- 6% of global energy demand comes from Information and Communication Technology (ICT), including data centers, communication networks, and user devices.
- Data centers, which power our tech industry, account for 3% of global energy demand.
Okay, so perhaps we in the IT industry aren't single-handedly destroying the planet, but we do bear some responsibility for it.
**What is AWS is doing to slow down climate change?**
AWS is doing its part by building sustainable infrastructure to power its cloud operations. When you look at the numbers:
- **4.1x** - AWS infrastructure is up to 4.1 times more energy-efficient than on-premises setups and can reduce workload carbon footprint by up to 99%.
- **3.9 billion** - Liters of water are returned to communities each year from replenishment projects completed or underway.
- **90%** - In 2022, 90% of the electricity consumed by Amazon was sourced from renewable energy.
Finally,
**Net-zero** - AWS aims to achieve net-zero carbon emissions across its operations by 2040 through investments in carbon-free energy and scaling solutions. Net-zero refers to the balance achieved when the amount of greenhouse gases emitted into the atmosphere is equal to the amount removed, resulting in no net increase in atmospheric greenhouse gas levels.
Now that we understand climate change, its impact, and its causes, let's explore what AWS cloud architects can do to control it from our end.
**Things you can do to save the planet as an AWS Cloud Architect**
- **Go serverless**. It's the best way to help the cause. There's no need to have dedicated compute; it's one of the best ways to reduce energy usage. Wherever possible, implement serverless architectures. Design applications using AWS Lambda and serverless technologies to automatically scale resources with demand, minimizing idle capacity and energy waste. It's about running code only when needed to optimize energy consumption efficiently.
- **Don't overprovision capacity**. While you pay more, it doesn't help the cause. Use AWS Auto Scaling: Configure AWS Auto Scaling to dynamically adjust EC2 instances or containers based on workload fluctuations, optimizing energy consumption.
- **Choose data center locations wisely**. While it's challenging, some data center locations may be greener than others. Choose data center locations with renewable energy: Select AWS Regions and Availability Zones prioritizing renewable energy to minimize the carbon footprint of cloud operations.
- **Build optimal architectures by following the AWS Well-Architected Framework** Adhere to best practices for designing efficient, cost-effective, and sustainable cloud architectures to minimize environmental impact.
- **Deploy managed databases**. Implement managed databases such as Aurora to automatically adjust database capacity based on application demand, optimizing resource usage and reducing energy consumption.
- **Use AWS managed services where possible**. It's one of the best ways to save excessive energy use. With managed services, you're using services provided by AWS, automating routine tasks such as patching, monitoring, and backups, reducing operational overhead and promoting efficiency.
- **Find ways to use EC2 Spot Instances**. Use EC2 Spot Instances to access spare AWS compute capacity at reduced costs, promoting efficient resource utilization.
- **Listen to AWS recommendations to optimize your estate**. Leverage AWS Trusted Advisor for real-time guidance on optimizing infrastructure, enhancing performance, reducing costs, and improving environmental sustainability.
- **Look at cost reduction** When you reduce costs, you also help save unnecessary energy usage. Utilize AWS Cost Explorer to visualize and manage AWS spending, identify cost-saving opportunities, and optimize resource efficiency to minimize financial and environmental costs.
- **Use sustainable storage options** Opt for Amazon S3 Glacier for long-term data storage, leveraging its cost-effectiveness and minimal environmental impact compared to traditional storage solutions. Utilize Amazon storage classes wisely.
- **Finally, monitor AWS using CloudWatch** Monitor AWS resource utilization in real-time, analyze trends, and implement optimizations to reduce energy consumption and costs.
Follow the above best practices, and every day when you go to sleep, you'll rest happily knowing that in your own way, you're doing what you can to save the planet. Yes, as Cloud Architects, you can help save the planet. Finally, that's not the only thing you can do. Learn a few small habits that can have lasting impacts in our effort to fight climate change.
When you're at the office or working from home, turn off unnecessary lights and electronics. Make it a habit to switch off lights and unplug electronics when you're not using them. This saves electricity and lowers your energy consumption.
I'm wrapping it up. I hope many of you find this useful, and I'm sure there are many other ways to fight the cause as Cloud Architects. Let's start sharing your experiences and contributing to the cause. Remember, as individuals, there is a lot we can do, and as a community, we have a massive role to play. | indika_wimalasuriya |
1,914,217 | RF Word Counter | RF Word Counter Simple word counter web app for beginners. I will share how I developed... | 27,976 | 2024-07-07T02:45:02 | https://dev.to/rahatfaruk/rf-word-counter-3jph | javascript, webdev, beginners, frontend | ## RF Word Counter
Simple word counter web app for beginners. I will share how I developed this project step by step.
When the user types or pastes any text, the app counts the number of words and characters in the textarea. Words exclude spaces and line breaks, while characters include everything.
**Tech**: html, css and javascript
- live link: [rf-word-counter.netlify.app](https://rf-word-counter.netlify.app/)
- github repo: https://github.com/rahatfaruk/rf-word-counter
### html
In html, I have created a container `textarea-and-result` that contains textarea (for user's text) and results (how many words and characters - initially 0).
```html
<div class="textarea-and-result">
<!-- results -->
<div class="result-container">
<p><span id="words">0</span> Words</p>
<p><span id="chars">0</span> Characters</p>
</div>
<!-- textarea -->
<textarea name="textarea"></textarea>
</div>
```
Rest codes inside html is for styling and page structure purpose.
### css
I have tried to keep the design as simple as possible. I have tried to explain styles through comment. Paste the following code inside style.css file.
```css
/* ## resets and base styles */
* {
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: sans-serif;
}
body { padding: 1rem; }
h1 {
margin: 1rem 0 1.5rem;
text-align: center;
}
textarea {
display: block;
height: 100px;
width: 100%;
padding: 1rem;
border: none;
border-radius: .5rem;
background: #dfdfdf;
font-size: 1rem;
resize: vertical;
}
/* ## app styles */
.app {
max-width: 600px;
margin: 0 auto;
}
.textarea-and-result {
padding: 2rem 1rem;
border: 2px solid #ccc;
box-shadow: 3px 3px 8px #ccc;
border-radius: .25rem;
}
.result-container {
display: flex;
gap: 1rem;
margin-bottom: 1.5rem;
justify-content: center;
}
.result-container p {
padding: 1rem;
border-radius: .5rem;
background: #dfdfdf;
text-align: center;
}
.result-container p span {
display: block;
font-weight: bold;
font-size: 2.5rem;
margin-bottom: .5rem;
}
.attribution {
margin-top: 1.5rem;
color: #999;
font-size: .9rem;
text-align: center;
}
```
### Javascript (Steps):
```js
// 1.
const textarea = document.querySelector('textarea')
const wordsEl = document.getElementById('words')
const charsEl = document.getElementById('chars')
const spacesEl = document.getElementById('spaces')
// 2.
textarea.addEventListener('input', e => {
// 3.
const text = e.target.value
// 4. & 5.
const words = text.match( /\S+/gm )
const spaces = text.match( /\s/gm )
// 6. & 7.
wordsEl.textContent = words ? words.length : 0
charsEl.textContent = text ? text.length : 0
spacesEl.textContent = spaces ? spaces.length : 0
})
```
Expanation:
1. Get all important elements.
2. Add the `input` event to the textarea to count words immediately after typing or pasting text.
3. Get the text inside the textarea.
4. Get an array of all words (excluding spaces and line breaks) and store it in the `words` variable. Use `text.match( /\S+/gm )`. Explanation of the regex:
- `g` flag means global match.
- `m` flag means multi-line.
- `\S` matches any non-whitespace character.
- `+` matches the previous token one or more times.
5. Get an array of all spaces. Use `text.match( /\s/gm )`. Spaces includes line breaks.
6. Calculate the results. If the textarea is empty, `words` is `null`; otherwise, it's an array. Return `0` for `null`, otherwise count the words.
- Use `words.length` to count words.
- Use `text.length` to get the total number of characters.
7. Update the UI with the results. | rahatfaruk |
1,914,183 | Monthly Amazon Location Service Updates - 2024.06 | Monthly Amazon Location Service Updates - 2024.06 This is a summary of the June... | 0 | 2024-07-07T02:06:30 | https://dev.to/aws-heroes/monthly-amazon-location-service-updates-202406-5a86 | amazonlocationservice, amplifygeo, amazonlocationserviceupdates, amplify | 
### Monthly Amazon Location Service Updates - 2024.06
<br>
This is a summary of the June updates for Amazon Location Service.
<br>
## 2024.06 Updates
[Amazon Location Service launches Enhanced Location Integrity features](https://aws.amazon.com/about-aws/whats-new/2024/06/amazon-location-service-enhanced-location-integrity-features)
Customers can now use predictive tools that anticipate user movements into or out of customer-specified areas.
<br>
## Other Info
[Amazon Location Service Demo](https://location.aws.com)
Official Amazon Location Service demo.
[Amazon Location Service Developer Guide](https://docs.aws.amazon.com/location/latest/developerguide)
Official Amazon Location Service Documentation.
[AWS Geospatial](https://github.com/aws-geospatial)
Official AWS Geospatial samples.
[Amplify Geo Docs](https://docs.amplify.aws/lib/geo/getting-started/q/platform/js)
Official Amplify Geo Docs.
[maplibregljs-amazon-location-service-starter](https://github.com/mug-jp/maplibregljs-amazon-location-service-starter)
Build environment to get started with Amazon Location Service.
[dev.to](https://dev.to/dayjournal)
Articles on Amazon Location Service.
[tags - Amazon Location Service](https://day-journal.com/memo/tags/Amazon-Location-Service)
[tags - Try](https://day-journal.com/memo/tags/Try)
Notes on Amazon Location Service. (Japanese)
<br>
## Related Articles
{% link https://dev.to/aws-heroes/monthly-amazon-location-service-updates-202405-36me %} | dayjournal |
1,914,124 | Dockerize Laravel API Backend + React Frontend Application | To Dockerize a Laravel API backend and React frontend application together in your development... | 0 | 2024-07-07T02:04:44 | https://dev.to/abdelkarimain/dockerize-laravel-api-backend-react-frontend-application-1ag7 | docker, laravel, react, vite | To Dockerize a Laravel API backend and React frontend application together in your development environment, we'll set up Dockerfiles for each project (Laravel and React) and a Docker Compose file to orchestrate them. Here’s a step-by-step guide:
## Step 1: Dockerize the Laravel Backend
Create a `Dockerfile `in the root of your Laravel project:
```YML
# Use the official PHP image with Apache as the base image
FROM php:7.4-apache
# Set the working directory in the container
WORKDIR /var/www/html
# Install dependencies and enable Apache modules
RUN apt-get update && apt-get install -y \
libpng-dev \
libjpeg-dev \
libfreetype6-dev \
libzip-dev \
zip \
unzip \
&& docker-php-ext-configure gd --with-freetype --with-jpeg \
&& docker-php-ext-install gd pdo pdo_mysql zip \
&& a2enmod rewrite
# Copy existing application directory contents to the container
COPY . .
# Expose port 80 to allow outside access to our application
EXPOSE 80
# Apache gets grumpy about PID files pre-existing
RUN rm -f /var/run/apache2/apache2.pid
# Apache configuration (optional): Uncomment if you need custom Apache configurations
# COPY apache-config.conf /etc/apache2/sites-available/000-default.conf
# Start Apache server
CMD ["apache2-foreground"]
```
In the Laravel project directory, build and run the Docker container:
```bash
docker build -t laravel-app .
docker run -p 8000:80 --name laravel-container laravel-app
```
nsure your Laravel application is configured to use` pdo_mysql` in `.env`.
## Step 2: Dockerize the React Frontend
Create a `Dockerfile `in the root of your React project (assuming you're using `create-react-app`):
```YML
# Use the official Node.js image with Yarn as the base image
FROM node:lts
# Set the working directory in the container
WORKDIR /app
# Copy package.json and package-lock.json if using npm
# COPY package*.json ./
# Install dependencies
RUN npm install -g serve
COPY . .
# Build your React application
RUN npm run build
# Expose port 3000 to allow outside access to our application
EXPOSE 3000
# Serve the React application using serve
CMD ["serve", "-s", "build"]
```
In the React project directory, build and run the Docker container:
```bash
docker build -t react-app .
docker run -p 3000:3000 --name react-container react-app
```
## Step 3: Create a Docker Compose File
Create a `docker-compose.yml` file in the root directory (outside both projects):
```YML
version: '3.8'
services:
laravel:
build:
context: ./path/to/laravel/project
dockerfile: Dockerfile
ports:
- "8000:80"
depends_on:
- mysql
react:
build:
context: ./path/to/react/project
dockerfile: Dockerfile
ports:
- "3000:3000"
mysql:
image: mysql:5.7
restart: always
environment:
MYSQL_DATABASE: laravel_database
MYSQL_USER: root
MYSQL_PASSWORD: example
MYSQL_ROOT_PASSWORD: example
ports:
- "3306:3306"
```
## Step 4: Start Docker Compose
In the directory where your `docker-compose.yml` file is located, start Docker Compose:
```bash
docker-compose up
```
This command will start all services defined in the `docker-compose.yml` file (`laravel`, `react`, and `mysql`).
**Notes:**
> Adjust paths (context in `docker-compose.yml` and paths in `Dockerfile`) according to your project structure.
> Ensure your Laravel `.env` file has the correct MySQL credentials (`DB_HOST=mysql`, etc.).
| abdelkarimain |
1,914,182 | The Bizarre World of JavaScript Type Coercion | JavaScript is a versatile and powerful language, but it comes with its own set of quirks. One of the... | 0 | 2024-07-07T01:50:26 | https://dev.to/subham_behera/the-bizarre-world-of-javascript-type-coercion-58h0 | javascript, beginners, programming, webdev | JavaScript is a versatile and powerful language, but it comes with its own set of quirks. One of the most bizarre and often misunderstood aspects of JavaScript is type coercion. Type coercion is the process by which JavaScript automatically converts a value from one type to another. This can lead to some unexpected and downright weird behaviors.
## Understanding Type Coercion
Type coercion in JavaScript can occur in various situations, such as during comparisons, arithmetic operations, and even in logical contexts. JavaScript has two types of equality operators: `==` (loose equality) and `===` (strict equality). The loose equality operator (`==`) performs type coercion, while the strict equality operator (`===`) does not.
Let's start with some simple examples to see how type coercion works:
```javascript
console.log(1 == '1'); // true
console.log(1 === '1'); // false
```
In the first example, JavaScript converts the string `'1'` to a number before making the comparison, resulting in `true`. In the second example, no conversion occurs, so the comparison returns `false`.
## Type Coercion in Arithmetic Operations
Type coercion can lead to some unexpected results in arithmetic operations. Let's look at a few examples:
```javascript
console.log('5' - 3); // 2
console.log('5' + 3); // '53'
console.log('5' * '2'); // 10
console.log('5' / '2'); // 2.5
```
In the first example, the string `'5'` is converted to a number before the subtraction operation, resulting in `2`. However, in the second example, the `+` operator concatenates the string `'5'` and the number `3`, resulting in the string `'53'`. The `*` and `/` operators also convert strings to numbers before performing the operations.
## The Infamous `NaN` and Type Coercion
`NaN` stands for "Not-a-Number," but it is, in fact, a number type in JavaScript. Type coercion involving `NaN` can lead to some peculiar results:
```javascript
console.log(NaN == NaN); // false
console.log(NaN === NaN); // false
console.log(isNaN(NaN)); // true
console.log(isNaN('hello')); // true
```
`NaN` is the only value in JavaScript that is not equal to itself, which is why `NaN == NaN` and `NaN === NaN` both return `false`. The `isNaN` function can be particularly confusing because it returns `true` for non-numeric strings as well.
## Coercion in Logical Contexts
Type coercion also occurs in logical contexts, such as `if` statements and logical operators (`&&`, `||`):
```javascript
console.log(false == '0'); // true
console.log(false === '0'); // false
console.log(null == undefined); // true
console.log(null === undefined); // false
if ('hello') {
console.log('This is true!'); // This is true!
}
if ('') {
console.log('This is true!');
} else {
console.log('This is false!'); // This is false!
}
```
In logical contexts, JavaScript coerces values to booleans. Non-empty strings are truthy, while empty strings are falsy. Similarly, `null` and `undefined` are both falsy, but `null == undefined` returns `true` due to type coercion.
## The Weirdness of Arrays and Objects
Type coercion can produce some truly bizarre results when dealing with arrays and objects:
```javascript
console.log([] == ''); // true
console.log([] == 0); // true
console.log([1, 2, 3] == '1,2,3'); // true
console.log({} == '[object Object]'); // false
console.log({} + []); // '[object Object]'
console.log([] + {}); // '[object Object]'
```
In the first example, an empty array is coerced to an empty string, resulting in `true`. In the second example, the empty array is coerced to `0`, also resulting in `true`. The third example converts the array `[1, 2, 3]` to the string `'1,2,3'`. However, when comparing objects, the results can be less predictable, as seen in the fourth example.
The last two examples demonstrate the odd behavior of the `+` operator with arrays and objects. When adding an empty array to an object, JavaScript converts both to strings and concatenates them.
## Avoiding Type Coercion Pitfalls
To avoid the pitfalls of type coercion, it's important to use the strict equality operator (`===`) whenever possible. This ensures that no type conversion occurs during comparisons:
```javascript
console.log(1 === '1'); // false
console.log(false === '0'); // false
console.log(null === undefined); // false
```
Additionally, you can use explicit type conversion to make your intentions clear:
```javascript
console.log(Number('5') - 3); // 2
console.log(String(5) + '3'); // '53'
console.log(Boolean('hello')); // true
console.log(Boolean('')); // false
```
## Conclusion
JavaScript type coercion can lead to some surprising and sometimes confusing results. You can avoid many common pitfalls by understanding how type coercion works and using strict equality checks and explicit type conversions. Embrace the quirks of JavaScript, and you'll be better equipped to handle the bizarre world of type coercion with confidence.
Happy coding! | subham_behera |
1,914,180 | Embarking on the Interactive Revolution | Welcome, tech savants and gaming aficionados! Imagine a world where the boundary between reality and... | 27,673 | 2024-07-07T01:35:07 | https://dev.to/rapidinnovation/embarking-on-the-interactive-revolution-50mj | Welcome, tech savants and gaming aficionados! Imagine a world where the
boundary between reality and virtuality blurs—a world where your physical
movements breathe life into the gaming universe. This once fantastical dream
is rapidly becoming reality in the dynamic realms of gaming and entertainment.
At the heart of this transformation are pose estimation and computer vision,
groundbreaking technologies that are fundamentally altering how we interact
with digital environments. Together, we will delve into this thrilling
evolution, discovering how these innovations are not just changing our gaming
experiences but revolutionizing them.
## The Game-Changing Duo: Pose Estimation and Computer Vision
Pose estimation and computer vision stand as twin pillars in this
revolutionary era. They are redefining the gaming landscape, transforming it
into a vibrant, interactive playground. Your movements, whether they are
subtle hand gestures or dynamic leaps, are no longer mere physical actions;
they become integral components of the gaming experience. This blend of the
tangible and virtual realms doesn't just open a door to new possibilities; it
shatters the old limitations, ushering in an era of gaming that is not only
immersive but also holistic. The synergy of these technologies creates a
seamless interface, merging the gamer with the game in an unprecedented
manner.
## The Dance of Digital Interaction
Imagine yourself in the midst of an adrenaline-fueled game where your
physicality is directly linked to the digital character you control. Your
movements are not just mirrored; they are the essence of the gameplay. When
you duck, your character instinctively ducks; when you leap, they soar. This
is the pinnacle of gesture recognition technology - a sophisticated, seamless
fusion of human motion and digital response. This innovation elevates gaming
from a static, sit-down experience to a dynamic, physically engaging activity,
transforming the gamer from a mere participant to an integral part of the
gaming world.
## Decoding Gestures: The Tech Behind
The technology driving this interactive enchantment is both intricate and
fascinating. State-of-the-art cameras and sophisticated algorithms work in
concert, meticulously analyzing your every gesture. These systems translate
physical movements into fluid, responsive actions within the game, creating a
level of interaction that was once the stuff of science fiction. This complex
process goes far beyond the boundaries of traditional gaming interfaces,
offering a truly revolutionary way to experience digital worlds. As we delve
deeper into the mechanics of this technology, we uncover a synergy of hardware
and software that is not just about understanding human movement but about
creating a new language of interaction between the gamer and the game.
## Embracing the Future with Open Arms
As we open our arms to these burgeoning technologies, we find ourselves on the
precipice of a world brimming with boundless possibilities. The realms of
gaming and entertainment are merely the starting points of this technological
odyssey. The principles underlying pose estimation and computer vision hold
the promise of revolutionizing a plethora of sectors. In healthcare, they can
aid in patient monitoring and rehabilitation, providing interactive and
precise physical therapy solutions. In education, these technologies can
transform learning experiences, making them more engaging and immersive. The
retail industry could see a new era of shopping experiences where virtual try-
ons and interactive displays become the norm. These advancements signify a
paradigm shift in how we interact with technology, making it more intuitive,
accessible, and impactful across various aspects of life.
Are you prepared to step into a future where your movements and interactions
craft your digital narratives? The landscape of interactive entertainment is
unfolding before us, marking an exhilarating epoch in technological
advancement. As we close this chapter of exploration into pose estimation and
computer vision, it's important to recognize that our journey has only just
begun. The full potential of these technologies remains a frontier yet to be
fully charted. The path ahead is rich with discovery, innovation, and
unbounded possibilities. Let's move forward with enthusiasm and a
collaborative spirit to shape a future that is not just interactive and
inclusive but also filled with wonder and excitement. The journey ahead is not
just about witnessing the evolution of technology; it's about being an
integral part of it.
📣📣Drive innovation with intelligent AI and secure blockchain technology! Check
out how we can help your business grow!
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[AI Software Development](https://www.rapidinnovation.io/ai-software-
development-company-in-usa)
[AI Software Development](https://www.rapidinnovation.io/ai-software-
development-company-in-usa)
## URLs
* <http://www.rapidinnovation.io/post/unwrapping-the-enigma-pose-estimations-spellbinding-impact-on-the-world-of-gaming-and-entertainment>
## Hashtags
#InteractiveRevolution
#PoseEstimation
#ComputerVision
#FutureOfGaming
#TechInnovation
| rapidinnovation |
|
1,914,177 | 5 reasons to use open source event ticketing for your next event | So, you've got an event coming up, and you're knee-deep in planning chaos. But what if I told you... | 0 | 2024-07-07T01:33:16 | https://dev.to/daveearley/5-reasons-to-use-open-source-event-ticketing-for-your-next-event-14gg | So, you've got an event coming up, and you're knee-deep in planning chaos. But what if I told you there's a way to make it all a breeze? Enter open source event ticketing: it's here to save your wallet, event, and sanity. Let's dive into why you should consider open source event ticketing for your next shindig.
## 1. **Say Goodbye to Ticketing Fees**
Traditional ticketing platforms often come with hefty fees that can add up and eat into your budget fast. Open source solutions, on the other hand, are typically free or come at a fraction of the cost. You can allocate those savings to other aspects of your event—like better snacks, an amazing DJ, or those swanky decorations you've had your eye on.
## 2. **Customization Galore**
Open source software is like a blank canvas. You have complete control over the look and feel of your ticketing system. Want a neon pink checkout page? Go for it. Need a registration form that asks for shoe size? No problem. With open source, you can tailor everything to match your event’s unique vibe and requirements.
## 3. **Flexibility for Days**
Events come in all shapes and sizes, and so do their ticketing needs. Whether you’re hosting a small workshop or a massive festival, open source event ticketing platforms can scale up or down with ease. Plus, many of these platforms offer features like multiple ticket types, promo codes, and detailed analytics, giving you the flexibility to manage your event your way.
## 4. **Community Support**
When you opt for an open source solution, there’s a whole world of developers and users out there who are eager to help. Stuck on a problem? There’s probably a forum thread about it. Need a new feature? Someone might just build it for you. It’s like having a tech support team, minus the elevator music.
## 5. **Transparency and Security**
With open source, what you see is what you get. The code is open for everyone to inspect, which means there’s a whole community of people constantly checking for vulnerabilities and improving the software. It’s a level of transparency that proprietary platforms just can’t offer. You can rest easy knowing your ticketing data is secure.
## So, Why Hi.Events?
If you're ready to dive into the world of open source event ticketing, look no further than [Hi.Events](https://github.com/HiEventsDev/Hi.Events). This new open-source event management and ticket-selling platform is perfect for conferences, club nights, and everything in between. With features like detailed analytics, customizable event homepages, and embeddable ticket widgets, Hi.Events makes event planning a breeze. And yes, it's as cool as it sounds.
In conclusion, if you're planning an event, do yourself a favor and consider open source ticketing. It’s cost-effective, customizable, flexible, and supported by a passionate community. Plus, you'll look like a tech genius. What’s not to love? | daveearley |
|
1,914,179 | Day 13 of Cloud Computing | Here’s a summary of what I did: Created 2 EC2 Instances:These are your servers. Launched an... | 0 | 2024-07-07T01:32:24 | https://dev.to/okalu2625/day-13-of-cloud-computing-31ig | Here’s a summary of what I did:
1. Created 2 EC2 Instances:These are your servers.
2. Launched an Application Load Balancer:This helps distribute incoming traffic evenly across your servers.
3. Created a Security Group:This allows only HTTP traffic to your servers.
4. Grouped Instances in a Target Group: This is a set of servers the load balancer will distribute traffic to.
5. Created an Auto Scaling Group (ASG): This adjusts the number of servers automatically based on demand.
6. Created a Launch Template: This template provides the ASG with the necessary instructions to create new EC2 instances.
7. Attached ASG to the Load Balancer: This ensures traffic is evenly distributed across the instances, and new instances are created or deleted as needed.
In essence, I set up a system where the load balancer distributes traffic and the ASG ensures the right number of servers are running based on current demand.
| okalu2625 |
|
1,914,116 | How to Host a Static Website on Azure Blob Storage Using Visual Studio Code | Hosting a static website on Azure Blob Storage is a straightforward and cost-effective solution for... | 0 | 2024-07-07T01:26:41 | https://dev.to/florence_8042063da11e29d1/how-to-host-a-static-website-on-azure-blob-storage-using-visual-studio-code-o2m | azureblobstorage, staticwebsite, visualstudiocode, cloudcomputing |
Hosting a static website on Azure Blob Storage is a straightforward and cost-effective solution for deploying your site. Using Visual Studio Code (VS Code) can streamline this process by allowing you to manage your website files and [Azure](https://dev.to/florence_8042063da11e29d1/core-architectural-components-of-azure-all-you-need-to-know-2n5k) resources directly from your development environment. This guide will walk you through the steps required to host your static website on Azure Blob Storage using VS Code.
Before you start, ensure you have the following:
An Azure account: If you don't have one, you can create a free account.
Basic understanding of Azure Portal.
Install Visual Studio Code
Install Azure Storage extension for VS Code from the Extensions view in VS Code.
###Step 1: Set Up Your Project in VS Code###
Open VS Code: Launch Visual Studio Code on your computer.
**Create or open your website project**:
If you already have a project, open it by clicking on "File" > "Open Folder" and selecting your project folder.
###Step 2: Create a Storage Account in Azure###
Log in to Azure:
Follow the prompts to sign in to your Azure account.
**Create a new storage account**:
Click on **Storage account**
Click on **Create**
**Select**:
**Subscription**
Create new **Resource group**
**Storage account name**
**Region**
**Performance**
**Redundancy**
Click on **Review and create**
**Deployment in progress**
When **Your deployment is complete**, click on **Go to resource**
###Step 3: Configure static website settings##:
Go to your storage account in the Azure Portal.
Under **Settings** select Click on **Static website**
Click on the **Enabled** button
Specify the index document name (e.g., index.html) and the error document path (e.g., 404.html).
Click "Save." This will generate a primary endpoint URL for your static website.
Click on **Data storage** select **Container** and click on **$web**
Click on **Upload**. Choose the files of your static website (HTML, CSS, JavaScript, images, etc.)
**Uploads**
###Step 4: Go to VS Code###
Right click then select **Deploy to static website via Azure Storage**
**Sign into your Azure account**
**Deploying**
My **Static website**
Another way without using **Visual Studio Code** is to copy the primary endpoint URL.
Paste the URL into your browser to view your hosted static website.
Conclusion
Hosting a static website on Azure Blob Storage using Visual Studio Code is an efficient and cost-effective way to deploy and manage your site. Integrating VS Code into your workflow allows you to seamlessly handle your website files and Azure resources from a single development environment. Azure Blob Storage provides high availability and scalability, making it an ideal choice for hosting static content.
| florence_8042063da11e29d1 |
1,914,176 | Image to ASCII | Esse código é uma implementação de arte ASCII em Processing, que converte uma imagem em numa... | 0 | 2024-07-07T01:23:17 | https://dev.to/jmartsdesign/image-to-ascii-mk3 | javascript, openprocessing, programming, beginners | 
Esse código é uma implementação de arte ASCII em Processing, que converte uma imagem em numa representação de caracteres ASCII. Vamos comparar esse código com a versão em Processing e explicá-lo em detalhes:
## Código em Processing
O código em Processing seria muito semelhante, com algumas diferenças sintáticas e de API. Aqui está uma versão equivalente em Processing:
<details>
<summary>Processing Code</summary>
```java
PImage img;
int cellSize = 8; // Tamanho da célula ASCII
void preload() {
// Carrega a imagem antes do setup
img = loadImage("example.jpg");
}
void setup() {
size(1024, 1024);
textSize(cellSize);
fill(255); // Define a cor do texto como branco
}
void draw() {
background(0);
if (img != null) {
img.filter(GRAY);
pushMatrix();
scale(1.0 * width / img.width, 1.0 * height / img.height);
for (int x = 0; x < img.width; x += cellSize) {
for (int y = 0; y < img.height; y += cellSize) {
color c = img.get(x, y);
float gray = brightness(c);
char asciiChar = getASCIIChar(gray);
text(asciiChar, x, y + cellSize);
}
}
popMatrix();
}
}
char getASCIIChar(float gray) {
if (gray >= 0 && gray <= 25) {
return 'M';
} else if (gray >= 26 && gray <= 50) {
return '$';
} else if (gray >= 51 && gray <= 76) {
return 'o';
} else if (gray >= 77 && gray <= 102) {
return '|';
} else if (gray >= 103 && gray <= 127) {
return '*';
} else if (gray >= 128 && gray <= 152) {
return ':';
} else if (gray >= 153 && gray <= 178) {
return '\'';
} else if (gray >= 179 && gray <= 204) {
return '.';
} else {
return ' ';
}
}
void keyPressed() {
if (key == 's') {
saveASCIIArt(); // Salvar a imagem ASCII art
} else if (key == 'r') {
img = null; // Limpar a imagem para começar de novo
}
}
void saveASCIIArt() {
saveCanvas("ascii-art", "png");
println("ASCII art saved as image.");
}
```
</details>
As principais diferenças entre o código em Processing e o código em JavaScript (P5.js) são:
1. **Sintaxe e Nomenclatura**: O código em Processing usa a sintaxe e a nomenclatura da linguagem Java, enquanto o código em P5.js usa a sintaxe e a nomenclatura do JavaScript.
2. **Declaração de Variáveis**: Em Processing, as variáveis são declaradas usando o tipo de dado (como `PImage` para imagens), enquanto em P5.js, as variáveis são declaradas usando `let`.
3. **Funções**: Em Processing, as funções são definidas usando a palavra-chave `void` ou o tipo de retorno, enquanto em P5.js, as funções são definidas usando a sintaxe de função do JavaScript.
4. **Chamadas de Função**: Em Processing, as funções são chamadas usando o nome da função seguido de parênteses, como `loadImage()` e `text()`. Em P5.js, as funções são chamadas da mesma maneira, mas a sintaxe é ligeiramente diferente, como `loadImage()` e `text()`.
5. **Constantes**: Em Processing, as constantes são definidas usando `final`, como `GRAY`. Em P5.js, as constantes são acessadas diretamente, como `GRAY`.
Apesar dessas diferenças sintáticas, o fluxo de execução e a lógica do programa são muito semelhantes entre as duas versões. Ambas carregam uma imagem, convertem-na em tons de cinza, percorrem a imagem célula por célula e exibem os caracteres ASCII correspondentes no canvas.
## Explicação do Código
O código em Processing e o código em P5.js realizam as mesmas tarefas, com algumas diferenças de sintaxe e API. Vamos explicar o código passo a passo:
1. **Declaração de Variáveis**: Ambos os códigos declaram uma variável para armazenar a imagem (`img`) e uma variável para definir o tamanho da célula ASCII (`cellSize`).
2. **Função `preload()`**: Essa função é chamada antes do `setup()` e carrega a imagem `example.jpg` antes que o programa seja executado.
3. **Função `setup()`**: Essa função é chamada uma vez, no início do programa. Ela cria um canvas de 1024x1024 pixels, define o tamanho do texto para o tamanho da célula ASCII e define a cor do texto como branco.
4. **Função `draw()`**: Essa função é chamada repetidamente, a cada quadro. Ela:
- Define o fundo como preto.
- Verifica se a imagem foi carregada.
- Converte a imagem para tons de cinza.
- Dimensiona a imagem para preencher todo o canvas.
- Percorre a imagem célula por célula.
- Para cada célula, obtém o valor de brilho (escala de cinza) e usa a função `getASCIIChar()` para obter o caractere ASCII correspondente.
- Exibe o caractere ASCII no canvas.
5. **Função `getASCIIChar(gray)`**: Essa função recebe um valor de brilho (escala de cinza) e retorna o caractere ASCII correspondente, com base em um conjunto de intervalos predefinidos.
6. **Função `keyPressed()`**: Essa função é chamada quando uma tecla é pressionada. Ela verifica se a tecla pressionada é 's' ou 'r':
- Se for 's', ela chama a função `saveASCIIArt()` para salvar a imagem ASCII art.
- Se for 'r', ela define a variável `img` como `null`, limpando a imagem para que o usuário possa começar de novo.
7. **Função `saveASCIIArt()`**: Essa função salva o canvas atual como uma imagem PNG com o nome 'ascii-art' e registra uma mensagem no console.
Embora haja algumas diferenças sintáticas entre o código em Processing e o código em P5.js, a lógica e o fluxo de execução são muito semelhantes. Ambos os códigos convertem uma imagem em uma representação de caracteres ASCII e permitem que o usuário salve a imagem ASCII art.
Sketch em [openprocessing.org](https://openprocessing.org/user/343550?view=sketches&o=34) -
[Image to ASCII
](https://openprocessing.org/sketch/2312114 ) | jmartsdesign |
1,914,174 | Resilience in Action: Recovering a $170,000 Bitcoin Investment | Experiencing the loss of a significant investment, like $170,000 in Bitcoin, can be deeply... | 0 | 2024-07-07T01:01:53 | https://dev.to/mara_carmenjosefa_b3bf4/resilience-in-action-recovering-a-170000-bitcoin-investment-324o | Experiencing the loss of a significant investment, like $170,000 in Bitcoin, can be deeply distressing and debilitating. Imagine building up a substantial cryptocurrency portfolio over years, only to see it disappear suddenly. When hackers or con artists took away my invaluable Bitcoin stash, I found myself in a devastating situation. The feeling of helplessness and fear was overwhelming, as it seemed my life savings had vanished in an instant. However, instead of resigning myself to this unfortunate fate, I took action.
I sought out the expertise of professionals specializing in locating and recovering stolen digital assets. I contacted TREK Tech Corp, a reputable firm known for their advanced investigative techniques, technical proficiency, and unwavering determination. Thanks to their efforts, they successfully traced and recovered the entire $170,000 worth of Bitcoin for me, leaving me incredibly grateful.
This remarkable turnaround, from total loss to the complete restoration of my cryptocurrency holdings, underscores the importance of perseverance and seeking out the right resources in the face of such a devastating financial setback. It's a reassuring narrative that demonstrates how even the most daunting cyber theft incidents can sometimes be resolved with diligence and the intervention of skilled recovery specialists.
If you find yourself in a similar situation, I highly recommend reaching out to TREK Tech Corp, for assistance. They can be contacted at: [trektechcorp1 AT gmail DOT com / trektechcorp AT consultant DOT com].
 | mara_carmenjosefa_b3bf4 |
|
1,914,172 | Using GitHub Container Registry (GHCR) to Host Your Docker Images | Tools Used Docker Github GHCR(GitHub Container... | 0 | 2024-07-07T01:00:27 | https://dev.to/madhucheran/using-github-container-registry-ghcr-to-host-your-docker-images-1bh4 | docker, github, githubactions, cicd | ##**Tools Used**
###Docker
###Github
###GHCR(GitHub Container Registry)
###Github Action##
##Tools outline
###Docker
Docker is a containerization tool. It is widely used in many companies today because it makes it easy to build, test, and deploy applications quickly. It can run in any environment.
Docker contains the source code of the application you develop and an OS with built-in libraries.
It acts like a virtual machine, which is why it includes an OS. We can choose the OS images based on our needs.
In simple terms, it's like we're packing up our entire system, slapping a shipping label on it, and sending it straight to the client's doorstep!
###GitHub
GitHub is a version control system where we upload and manage our code. It keeps track of changes made to the files.
For example, if I upload an image file to a repository on GitHub and later decide to replace it with a new version, I can commit the new image file to the repository.
This action creates a new version of the file while preserving the history of changes. If, at any point, people decide that they prefer the original image over the new one, I can easily revert to the previous version using GitHub's version control features.
This process ensures that all changes are tracked and reversible, providing a robust way to manage and maintain different versions of files over time.
Additionally, GitHub allows for collaborative work, so multiple people can contribute to the project, review changes, and suggest improvements, making it an invaluable tool for software development and project management.
###GHCR
GHCR stands for GITHUB CONTAINER REGISTRY
GitHub Container Registry (GHCR) is a registry that allows users to host and manage Docker container images in their GitHub account.
###Github Action
GitHub Actions is a continuous integration and continuous delivery (CI/CD) platform that allows you to automate your build, test, and deployment pipeline.
---
> Lets see how i build my projects
One day, while learning Docker, I had an idea: "Why not create a Dockerfile, run it on GitHub, and host it there?"
So, I decided to write a Dockerfile that contains the 2048 game. I had already tested the Dockerfile locally, and it ran smoothly. Lets move it to GHCR.
```
# Use a lightweight base image
FROM alpine:3.18
# Install dependencies (Nginx, zip, curl)
RUN apk add --no-cache nginx zip curl && \
mkdir -p /var/www/html
# Download and extract 2048 game files
RUN curl -o /var/www/html/master.zip -L https://codeload.github.com/gabrielecirulli/2048/zip/master && \
cd /var/www/html/ && unzip master.zip && mv 2048-master/* . && rm -rf 2048-master master.zip
# Copy Nginx configuration file
COPY default.conf /etc/nginx/http.d/default.conf
# Expose port 80 for Nginx
EXPOSE 80
# Start Nginx in foreground
CMD ["nginx", "-g", "daemon off;"]
```
Then I created a Docker image and pushed it to GitHub. After that, I wrote a CI/CD pipeline using GitHub Actions to connect to GHCR.
Because GitHub cannot directly build, run, and host itself, we need a container registry like Docker Hub or alternatives like GHCR.
> GitHub can only host a static site.
By using these tools, we can run this Dockerfile. I decided to choose GHCR because it is a product of GitHub and is also easy to configure.
So, the GitHub Action will trigger automatically if there is any change in the main branch.
```
name: Build, Push, and Deploy Docker Image for 2048
on:
push:
branches:
- main
jobs:
build_and_publish:
runs-on: ubuntu-latest
steps:
- name: Checkout repository
uses: actions/checkout@v3
- name: Log in to GitHub Container Registry
run: echo "${{ secrets.GH_PAT }}" | docker login ghcr.io -u madhucheran --password-stdin
- name: Build and push the Docker image
run: |
docker build . --tag ghcr.io/madhucheran/2048-ghcr:latest
docker push ghcr.io/madhucheran/2048-ghcr:latest
deploy:
needs: build_and_publish
runs-on: ubuntu-latest
steps:
- name: Checkout repository
uses: actions/checkout@v3
- name: Log in to GitHub Container Registry
run: echo "${{ secrets.GH_PAT }}" | docker login ghcr.io -u madhucheran --password-stdin
- name: Pull Docker image
run: docker pull ghcr.io/madhucheran/2048-ghcr:latest
- name: Create a container and extract static files
run: |
mkdir -p ./public
docker run --rm -d --name 2048-container ghcr.io/madhucheran/2048-ghcr:latest
sleep 10 # Wait for the container to start
docker cp 2048-container:/var/www/html ./public
docker stop 2048-container
ls -la ./public # List files to ensure index.html is present
- name: Deploy to GitHub Pages
uses: peaceiris/actions-gh-pages@v3
with:
github_token: ${{ secrets.GIT_TOKEN }}
publish_dir: ./public/html # Adjusted path to the html folder
publish_branch: gh-pages
```
This CI/CD process will build, run, and deploy the files inside the Dockerfile.
It builds the file in GHCR, runs it in GHCR, and then pulls it back to GitHub. It will automatically create a new branch in GitHub.
In GitHub, we need to host it, so I used gh-pages for hosting.
---
###CI/CD part
Any changes in github main branch the CI/CD part will automatically trigger and the commands
After the trigger
It will login to the github container registry
Then it will build and push the files inside the dockerfile
Deployment
Now again it will login to the GHCR
Now it will pull the files that are all running by the dockerfile by docker
Copy the files inside the running container to the respected folder
./public is used to show the github that here is the index.html is stored to host
Then it will deploy this files form the container to gh-pages
and if it successfully run and deployed the gh-pages will host itself
---
> In my experience i'm saying that "If you are facing lots of error while implementing any of the things while doing anything then you are blessed"
---
##Summary
This article explains how to build, test, and deploy a Dockerized version of the 2048 game using Docker, GitHub, GHCR (GitHub Container Registry), and GitHub Actions for CI/CD automation. We'll create a Dockerfile, push the Docker image to GHCR, and set up a CI/CD pipeline with GitHub Actions that automatically builds, pushes, and deploys the Docker image whenever changes are made to the main branch. Finally, we'll host the static site with gh-pages, enabling seamless integration and deployment of the 2048 game.
---
if there is any error in this blog let me know
❝𝐋𝐞𝐭𝐬-𝐋𝐞𝐚𝐫𝐧-𝐓𝐨𝐠𝐞𝐭𝐡𝐞𝐫❞
[Linked In](https://www.linkedin.com/in/madhucheran/)
[Twitter](https://x.com/madhucheranr)
[Reddit](https://www.reddit.com/user/madhucheran/)
Baked with 🔥 By Madhucheran
| madhucheran |
1,914,171 | Funcionalidades Essenciais de um Blog: Exemplos Práticos com Django REST Framework | Criar um blog usando Django REST Framework é uma excelente maneira de testar e aprimorar habilidades... | 0 | 2024-07-07T01:00:26 | https://dev.to/gustavogarciapereira/funcionalidades-essenciais-de-um-blog-exemplos-praticos-com-django-rest-framework-5ced | django, python, beginners, webdev | Criar um blog usando Django REST Framework é uma excelente maneira de testar e aprimorar habilidades em desenvolvimento web e APIs RESTful. Este projeto oferece uma visão abrangente das funcionalidades essenciais para um blog, como autenticação de usuários, criação e gerenciamento de posts e comentários, categorização de conteúdos, e sistemas de busca e filtragem. A implementação dessas funcionalidades não só fortalece o entendimento dos conceitos fundamentais do Django e Django REST Framework, mas também prepara o desenvolvedor para enfrentar desafios mais complexos em projetos futuros. Através da criação de um blog, o desenvolvedor iniciante aprende a manipular modelos de dados, construir endpoints de API, e implementar permissões e autenticação, tudo dentro de um ambiente de desenvolvimento realista.
O processo de desenvolvimento de um blog envolve diversas etapas críticas que abrangem desde a configuração inicial do projeto até a definição de modelos de dados, criação de serializers e views, e configuração de rotas. Cada uma dessas etapas é essencial para garantir que o blog funcione de maneira eficiente e segura. Além disso, a integração de funcionalidades adicionais, como sistema de likes, upload de imagens, e paginação, enriquece a aplicação e proporciona uma experiência de usuário mais completa. Ao concluir este projeto, o desenvolvedor não apenas consolida suas habilidades técnicas, mas também ganha uma compreensão prática de como construir aplicações web robustas e escaláveis usando Django REST Framework.
Um exemplo de funcionalidades essenciais para um blog desenvolvido com Django REST Framework inclui a implementação de um sistema de autenticação e autorização. Isso envolve permitir que os usuários se registrem, façam login e logout, garantindo que apenas usuários autenticados possam acessar certas funcionalidades, como a criação e edição de posts. Além disso, cada post deve estar associado a um autor, e a proteção de rotas deve ser configurada para assegurar que apenas o autor possa editar ou deletar seus próprios posts. Essas funcionalidades são fundamentais para manter a integridade e a segurança do conteúdo do blog.
Outro exemplo crucial é a implementação de operações CRUD (Create, Read, Update, Delete) para posts e comentários. Os endpoints devem permitir a criação de novos posts e comentários, a listagem de todos os posts e comentários, a atualização de posts e comentários existentes, e a exclusão dos mesmos. Além disso, a funcionalidade de comentários deve permitir que os usuários adicionem, visualizem, atualizem e deletem comentários em posts de blog. Essa capacidade de gerenciar conteúdo dinamicamente é essencial para qualquer plataforma de blog.
Para enriquecer a funcionalidade do blog, é importante incluir recursos como categorização de posts, sistema de likes e busca/filtro. Posts podem ser associados a categorias ou tags, permitindo melhor organização e filtragem. Um sistema de likes pode ser implementado para permitir que os usuários curtam posts, aumentando a interatividade do blog. Além disso, um sistema de busca e filtragem pode ser adicionado para permitir que os usuários encontrem posts por título, conteúdo, categoria ou tags, melhorando significativamente a experiência do usuário. Essas funcionalidades adicionais tornam o blog mais completo e interativo, proporcionando uma experiência de usuário mais rica e envolvente.
Vamos implementar as funcionalidades para criar um blog usando Django e Django REST Framework. Seguirei uma abordagem paso a passo:
### Passo 1: Configuração Inicial
#### 1.1. Instalação do Django e Django REST Framework
Primeiro, crie um ambiente virtual e instale Django e Django REST Framework:
```sh
python -m venv env
source env/bin/activate # On Windows use `env\Scripts\activate`
pip install django djangorestframework
```
#### 1.2. Criar o Projeto Django
```sh
django-admin startproject blog_project
cd blog_project
```
#### 1.3. Criar o Aplicativo do Blog
```sh
python manage.py startapp blog
```
#### 1.4. Adicionar Aplicativos ao `INSTALLED_APPS`
Edite `blog_project/settings.py` para adicionar `rest_framework` e `blog` aos aplicativos instalados:
```python
INSTALLED_APPS = [
...
'rest_framework',
'blog',
]
```
### Passo 2: Modelos
#### 2.1. Modelos de Post e Comentário
Edite `blog/models.py` para definir os modelos:
```python
from django.db import models
from django.contrib.auth.models import User
class Category(models.Model):
name = models.CharField(max_length=255)
def __str__(self):
return self.name
class Post(models.Model):
title = models.CharField(max_length=255)
content = models.TextField()
author = models.ForeignKey(User, on_delete=models.CASCADE)
categories = models.ManyToManyField(Category)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
def __str__(self):
return self.title
class Comment(models.Model):
post = models.ForeignKey(Post, related_name='comments', on_delete=models.CASCADE)
author = models.ForeignKey(User, on_delete=models.CASCADE)
content = models.TextField()
created_at = models.DateTimeField(auto_now_add=True)
def __str__(self):
return f'Comment by {self.author} on {self.post}'
```
### Passo 3: Serializers
Crie `blog/serializers.py` para definir os serializers:
```python
from rest_framework import serializers
from .models import Post, Comment, Category
from django.contrib.auth.models import User
class CategorySerializer(serializers.ModelSerializer):
class Meta:
model = Category
fields = '__all__'
class CommentSerializer(serializers.ModelSerializer):
author = serializers.ReadOnlyField(source='author.username')
class Meta:
model = Comment
fields = '__all__'
class PostSerializer(serializers.ModelSerializer):
author = serializers.ReadOnlyField(source='author.username')
comments = CommentSerializer(many=True, read_only=True)
categories = CategorySerializer(many=True)
class Meta:
model = Post
fields = '__all__'
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = ['id', 'username']
```
### Passo 4: Views
Crie `blog/views.py` para definir as views:
```python
from rest_framework import viewsets
from .models import Post, Comment, Category
from .serializers import PostSerializer, CommentSerializer, CategorySerializer, UserSerializer
from django.contrib.auth.models import User
from rest_framework.permissions import IsAuthenticatedOrReadOnly
class PostViewSet(viewsets.ModelViewSet):
queryset = Post.objects.all()
serializer_class = PostSerializer
permission_classes = [IsAuthenticatedOrReadOnly]
def perform_create(self, serializer):
serializer.save(author=self.request.user)
class CommentViewSet(viewsets.ModelViewSet):
queryset = Comment.objects.all()
serializer_class = CommentSerializer
permission_classes = [IsAuthenticatedOrReadOnly]
def perform_create(self, serializer):
serializer.save(author=self.request.user)
class CategoryViewSet(viewsets.ModelViewSet):
queryset = Category.objects.all()
serializer_class = CategorySerializer
class UserViewSet(viewsets.ReadOnlyModelViewSet):
queryset = User.objects.all()
serializer_class = UserSerializer
```
### Passo 5: URLs
Crie `blog/urls.py` e defina as rotas da API:
```python
from django.urls import path, include
from rest_framework.routers import DefaultRouter
from .views import PostViewSet, CommentViewSet, CategoryViewSet, UserViewSet
router = DefaultRouter()
router.register(r'posts', PostViewSet)
router.register(r'comments', CommentViewSet)
router.register(r'categories', CategoryViewSet)
router.register(r'users', UserViewSet)
urlpatterns = [
path('', include(router.urls)),
]
```
Adicione as rotas do aplicativo `blog` ao `blog_project/urls.py`:
```python
from django.contrib import admin
from django.urls import path, include
urlpatterns = [
path('admin/', admin.site.urls),
path('api/', include('blog.urls')),
]
```
### Passo 6: Configuração de Autenticação
Adicione URLs de autenticação em `blog_project/urls.py`:
```python
urlpatterns = [
path('admin/', admin.site.urls),
path('api/', include('blog.urls')),
path('api-auth/', include('rest_framework.urls')), # Adicione esta linha
]
```
### Passo 7: Migrações e Superusuário
Crie as migrações e o superusuário:
```sh
python manage.py makemigrations
python manage.py migrate
python manage.py createsuperuser
```
### Passo 8: Teste
Execute o servidor de desenvolvimento:
```sh
python manage.py runserver
```
Agora, você deve ter um blog básico funcionando com as funcionalidades listadas. Você pode testar os endpoints usando ferramentas como Postman ou diretamente pelo navegador. | gustavogarciapereira |
1,914,168 | Building a Sports Score App with Flutter | Introduction In today's fast-paced world, keeping up with sports scores has become an... | 0 | 2024-07-07T00:36:44 | https://dev.to/kartikmehta8/building-a-sports-score-app-with-flutter-3961 | javascript, beginners, programming, tutorial | ## Introduction
In today's fast-paced world, keeping up with sports scores has become an integral part of many people's lives. However, constantly checking multiple sources for updates can be time-consuming and inconvenient. This is where a sports score app comes in handy. With the rise of cross-platform app development, Flutter has emerged as a popular choice for building sports score apps. In this article, we will discuss the advantages, disadvantages, and features of building a sports score app with Flutter.
## Advantages
1. **Cross-platform compatibility:** Flutter allows for the development of apps that work seamlessly on both iOS and Android, reducing development time and costs.
2. **Fast performance:** Flutter's unique "hot reload" feature allows for quick changes in the code to be reflected in the app, leading to faster development and testing times.
3. **User-friendly interface:** Flutter provides a wide variety of customizable widgets and layouts, making it easier to create a visually appealing and user-friendly interface.
## Disadvantages
1. **Limited third-party library support:** As Flutter is relatively new, it has limited third-party library support compared to other cross-platform frameworks.
2. **Steep learning curve:** Flutter uses Dart programming language, which may take time for developers to learn and get accustomed to.
## Features
1. **Real-time updates:** A sports score app built with Flutter can provide real-time updates and notifications for ongoing games, ensuring that the users are always up to date.
2. **Customized alerts:** Users can set personalized alerts for their favorite teams or sports, ensuring that they never miss a score.
3. **Interactive UI elements:** Flutter's customizable widgets allow for the creation of interactive UI elements, such as live game tracking and highlights, improving user engagement.
### Example of Flutter Code for Real-time Updates
```dart
StreamBuilder(
stream: sportsScoreService.getLiveScores(),
builder: (context, snapshot) {
if (snapshot.hasError) return Text('Error: ${snapshot.error}');
switch (snapshot.connectionState) {
case ConnectionState.none: return Text('Not connected to the stream');
case ConnectionState.waiting: return Text('Awaiting scores...');
case ConnectionState.active: return ListView.builder(
itemCount: snapshot.data.length,
itemBuilder: (context, index) => ListTile(
title: Text(snapshot.data[index].teamName),
subtitle: Text('Score: ${snapshot.data[index].score}'),
),
);
case ConnectionState.done: return Text('Stream has ended');
}
},
)
```
## Conclusion
Building a sports score app with Flutter has numerous advantages, such as cross-platform compatibility, fast performance, and user-friendly interface. However, it also has its limitations, such as limited third-party library support and a steep learning curve. Nevertheless, the features offered by Flutter make it a promising framework for developing a sports score app that provides real-time updates and a seamless user experience. | kartikmehta8 |
1,914,167 | Leetcode Day 6: Merge Two Sorted Lists Explained | The problem is as follows: You are given the heads of two sorted linked lists list1 and list2. Merge... | 0 | 2024-07-07T00:35:13 | https://dev.to/simona-cancian/leetcode-day-6-merge-two-sorted-lists-explained-55n2 | python, leetcode, beginners, codenewbie | The problem is as follows:
You are given the heads of two sorted linked lists `list1` and `list2`.
Merge the two lists into one sorted list. The list should be made by splicing together the nodes of the first two lists.
Return the head of the merged linked list.
Example 1:
```
Input: list1 = [1,2,4], list2 = [1,3,4]
Output: [1,1,2,3,4,4]
```
Example 2:
```
Input: list1 = [], list2 = []
Output: []
```
Example 3:
```
Input: list1 = [], list2 = [0]
Output: [0]
```
Here is how I solved it:
Let's go through the provided definition for a singly-linked list:
```
class ListNode:
def __init__(self, val=0, next=None):
# Data stored in node val
self.val = val
# Reference to the next node
self.next = next
```
A singly linked list is a linear data structure where elements are connected in a sequence, and each element points to the next one using a pointer.
With that said, let's step through the logic here.
- Initialize a dummy_node that represents the starting point for the new merges sorted list.
- Set it to a pointer current_node (address in RAM, aka a variable) to construct the new list. Initially, this pointer will point to the dummy node.
```
class Solution:
def mergeTwoLists(self, list1: Optional[ListNode], list2: Optional[ListNode]) -> Optional[ListNode]:
dummy_node = ListNode()
current_node = dummy_node
```
- Use a while loop to iterate through both lists at the same time until of them is null.
- Choose the head with the smaller value of the two lists: if value of current node in `list1` is less than value of node in `list2`, then append the `list1` node to the merged list and move to next node in `list1`.
- Else, append the `list2` node to merged list and move to next node in `list2`.
- We are still in the while loop. Move the current_node pointer to the newly added node
```
while list1 and list2:
if list1.val < list2.val:
current_node.next = list1
list1 = list1.next
else:
current_node.next = list2
list2 = list2.next
current_node = current_node.next
```
- After the while loop, if there are remaining nodes in `list1` or `list2`, append them to the merged list.
- Return the head of the merged list, which is the next node of the dummy node.
```
if list1:
current_node.next = list1
else:
current_node.next = list2
return dummy_node.next
```
Here is the completed solution:
```
class Solution:
def mergeTwoLists(self, list1: Optional[ListNode], list2: Optional[ListNode]) -> Optional[ListNode]:
dummy_node = ListNode()
current_node = dummy_node
while list1 and list2:
if list1.val < list2.val:
current_node.next = list1
list1 = list1.next
else:
current_node.next = list2
list2 = list2.next
current_node = current_node.next
if list1:
current_node.next = list1
else:
current_node.next = list2
return dummy_node.next
```
| simona-cancian |
1,914,166 | HOW TO MONITOR YOUR CHILD’S PHONE WITH GEARHEAD ENGINEERS SOFTWARE | As a parent in the digital age, I've always worried about my children's online safety. That's why I'm... | 0 | 2024-07-07T00:20:51 | https://dev.to/dolores_leroy_62eb591eaf0/how-to-monitor-your-childs-phone-with-gearhead-engineers-software-3n86 | webdev, javascript |
As a parent in the digital age, I've always worried about my children's online safety. That's why I'm thrilled to share my experience with this incredible method for accessing my child's phone without physically touching it; GearHead Engineers’ Software.
From the moment I started using this tool, I was amazed by its simplicity and effectiveness. Here's why it's become an essential part of my parenting toolkit:
* Undetectable: My child has no idea I'm monitoring their activity, allowing for honest insights into their online behavior.
* Easy to use: Even as a tech novice, I found the process incredibly straightforward.
* Time-saving: No more awkward conversations or arguments about checking their phone – I can do it discreetly and efficiently.
* Affordable: The peace of mind this tool provides is priceless, but the actual cost fits comfortably within our family budget.
As a parent, I understand the ethical concerns surrounding phone monitoring. However, I view this as an essential part of my responsibility to protect my child in the digital world. It's not about invading privacy – it's about ensuring safety and guiding them towards responsible online behavior.
If you're a parent looking for a reliable way to keep tabs on your child's digital life, I wholeheartedly recommend giving GearHead Engineers’ Software a try. It's been a game-changer for our family, providing the perfect balance of oversight and trust. The website is gearheadengineers . org
 | dolores_leroy_62eb591eaf0 |
1,914,142 | The Gemika's Magical Guide to Sorting Hogwarts Students using the Decision Tree Algorithm (Part #3) | 3. Exploring the Enchanted Dataset 🌟 Welcome back, young wizards and witches! As we... | 0 | 2024-07-07T00:16:25 | https://dev.to/gerryleonugroho/the-gemikas-magical-guide-to-sorting-hogwarts-students-using-the-decision-tree-algorithm-part-3-4naa | machinelearning, ai, python, harrypotter | ## 3. Exploring the Enchanted Dataset 🌟
Welcome back, young **wizards and witches**! As we gather around the glowing hearth of the **Gryffindor** common room, it is time to delve into the heart of our magical quest: the enchanted dataset. Imagine this dataset as a map of the wizarding world, filled with secrets and mysteries waiting to be uncovered. Each row is a character, each column a spell, and together they tell the story of our beloved Hogwarts.
### **3.1 Introduction to the Dataset**
In the **wizarding world of data science**, our dataset is akin to the ancient scrolls stored in the Restricted Section of the Hogwarts Library. This particular dataset holds information about various **Hogwarts students**, their traits, and the houses they belong to. Much like the Sorting Hat, we will use this data to uncover patterns and predict future house placements. But first, let us familiarize ourselves with the contents of this magical scroll.
### **3.2 Loading Libraries in Python**
Before we can reveal the secrets of our dataset, we must first gather our magical tools. In the realm of data science, these tools come in the form of Python libraries. Think of them as our spell books, each containing powerful incantations that will help us manipulate and visualize our data. We will summon these libraries using the following spells:
```python
# Importing the necessary libraries for our magical journey
import pandas as pd # For data manipulation
import numpy as np # For numerical operations
import matplotlib.pyplot as plt # For data visualization
import seaborn as sns # For advanced data visualization
# Ensuring our charts are in line with the Hogwarts aesthetic
sns.set(style="whitegrid")
```
### **3.3 Reading the Dataset into a Pandas DataFrame**
With our spell books at the ready, it is time to conjure the dataset into a form we can work with. Using the mystical powers of *[pandas](https://pandas.pydata.org/)*, we will transform the dataset into a DataFrame, much like Professor McGonagall transfigures a desk into a pig. This DataFrame will be our primary tool for exploring and manipulating the data.
```python
# Reading the enchanted dataset into a Pandas DataFrame
dataset_path = '/mnt/data/hogwarts-students.csv' # Path to our dataset
hogwarts_df = pd.read_csv(dataset_path)
# Displaying the first few rows of the dataset to get a glimpse of its contents
print(hogwarts_df.head())
```
*Ah, look at that!* The first few rows of our DataFrame appear before us like the Marauder's Map, revealing the names, traits, and house placements of our fellow students. Each row tells a unique story, and together, they form the tapestry of Hogwarts.
### **3.4 Gemika's Pop-Up Quiz: Exploring the Enchanted Dataset**
And now, dear reader, my son **Gemika Haziq Nugroho** appears with a twinkle in his eye and a quiz in hand. He has prepared a series of questions to test your knowledge and ensure you are ready to proceed. Are you prepared to face the challenge?
1. **What Python library is used to read the dataset into a DataFrame?**
2. **How do you display the first few rows of a DataFrame?**
3. **What is the purpose of the `sns.set(style="whitegrid")` command?**
Answer these questions correctly, and you will have proven your understanding of the enchanted dataset. Only then can we proceed to uncover the deeper mysteries that lie within. With our dataset unveiled and our understanding tested, we are now ready to embark on the next phase of our journey. The secrets of Hogwarts await, and with our wands and wisdom, we shall uncover them all. Onward, to adventure and discovery! 🌟✨🧙♂️ | gerryleonugroho |
1,914,145 | QUALIFIED BITCOIN/ETH/USDT RECOVERY EXPERT FROM CYBER CONSTABLE INTELLIGENCE | Sea of online transactions, where promises of high returns and quick profits often collide with the... | 0 | 2024-07-07T00:12:15 | https://dev.to/daniel_ledwig_13e78e6b2c6/qualified-bitcoinethusdt-recovery-expert-from-cyber-constable-intelligence-1a8e | webdev, programming, javascript, devops | Sea of online transactions, where promises of high returns and quick profits often collide with the harsh reality of scams, finding recovery experts can seem like an impossible task. However, amidst the chaos, there exists a shining light – CYBER CONSTABLE INTELLIGENCE. My journey with CYBER CONSTABLE INTELLIGENCE began at a time of profound desperation when I found myself ensnared in the web of a fraudulent cryptocurrency investment platform. I must extend my immense gratitude to CYBER CONSTABLE INTELLIGENCE for their professionalism, expertise, and unwavering commitment to helping individuals like myself navigate the treacherous waters of online fraud. My ordeal began with the allure of quick wealth, as I sought to invest my hard-earned inheritance from the sale of my late grandfather's company into what seemed like a promising cryptocurrency venture. Little did I know, I was stepping into a trap that would leave me devastated, having lost nearly everything I had invested, including my inheritance totaling CAD 1 million. As the realization of the scam unfolded, I was plunged into a state of despair and hopelessness. Every attempt to reclaim my funds seemed futile, and I felt utterly shattered and broken. It was during this darkest hour that I stumbled upon CYBER CONSTABLE INTELLIGENCE, a name that would soon become synonymous with salvation in my mind. Driven by desperation and fueled by the testimonials of others who had found solace in their services, I reached out to CYBER CONSTABLE INTELLIGENCE, clinging to a sliver of hope that they could help me reclaim what was rightfully mine. From the moment I made contact, their team demonstrated an unparalleled level of hackers. They listened attentively to my story, reassured me of their capabilities, and devised a strategic plan of action to pursue the recovery of my lost assets. What ensued can only be described as a testament to their expertise and dedication. With meticulous precision and unwavering perseverance, CYBER CONSATBLE INTELLIGENCE embarked on the arduous task of unraveling the complexities of the fraudulent scheme that had ensnared me. Their team navigated through the murky depths of the online world with unparalleled skill, leaving no stone unturned in their quest for justice. Despite the formidable obstacles they faced, CYBER CONSTABLE INTELLIGENCE remained steadfast in their pursuit, providing me with regular updates and guidance every step of the way. Their unwavering commitment to my case filled me with a renewed sense of hope and determination, and it was not long before their efforts bore fruit. Against all odds, they succeeded in recovering every cent of my lost investment, restoring not only my financial security but also my future in cryptocurrency I cannot overstate the gratitude I feel towards CYBER CONSTABLE INTELLIGENCE for their invaluable assistance during my darkest hour. Their professionalism, expertise, and unwavering dedication have not only restored my financial well-being but have also provided me with a newfound sense of empowerment and resilience. To anyone who finds themselves victimized by online fraud, I wholeheartedly endorse CYBER CONSTABLE INTELLIGENCE in the fight against deception and injustice. Trust in their expertise, and let them guide you towards the light at the end of the tunnel. Reach out to them through the via info below: WhatsApp info: +1 (2 5 2 ) 3 7 8 - 7 6 1 1
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1,914,144 | The strategic value of a Security Champions Program. | Implementing a Security Champions Program at your organization offers a strategic advantage in... | 0 | 2024-07-06T23:59:55 | https://dev.to/cybertica/the-strategic-value-of-a-security-champions-program-1n86 | securesoftware, applicationsecurity, securitychampion, webdev | 
Implementing a Security Champions Program at your organization offers a strategic advantage in improving the security posture.
**What is a Security Champion?**
Some teams are not even sure what a security champion does to advocate for dev teams. A Security Champion helps to bridge the gap between technical security teams and other development teams, facilitating better communication and collaboration.
**What can a Security Champion Program provide?**
In essence, a Security Champion program not only mitigates risks but also cultivates a security-first mindset. This security-first mindset is an integral part of proactive steps towards safeguarding sensitive data and maintaining business continuity in all dev environments.
Developers and engineers are at the cutting edge of technology and constantly testing new software techniques. The collaboration between teams can reduce response times to emerging threats.
Embedding security knowledge within different teams decentralizes expertise, helping to address security concerns swiftly and reducing the bottleneck effect.
Involving different teams helps to instill a sense of ownership and responsibility. The empowered teammates leads to more security-conscious development practices and strengthens the organization’s defenses.
Here are some open-source resources building a Security Champion Program:
1) OWASP Security Champions: https://owasp.org/www-project-security-champions-guidebook/.
2) Dustin Lehr’s Security Champion Success Guide: https://securitychampionsuccessguide.org/.
Photo credit by charlesdeluvio on Unsplash.
| cybertica |
1,914,143 | Unwritten Rules of Stackoverflow | Comment down below that things you did that got you're answers or questions downvoted along with your... | 0 | 2024-07-06T23:44:37 | https://dev.to/mmvergara/unwritten-rules-of-stackoverflow-odm | discuss, stackoverflow | Comment down below that things you did that got you're answers or questions downvoted along with your mental health.
I will compile them in one way or another, | mmvergara |
1,899,745 | The Gemika's Magical Guide to Sorting Hogwarts Students using the Decision Tree Algorithm (Part #1) | 1. Welcome to Hogwarts School of Witchcraft and Wizardry! 🏰🌟🔮 In the heart of the... | 0 | 2024-07-06T23:23:06 | https://dev.to/gerryleonugroho/the-gemikas-magical-guide-to-sorting-hogwarts-students-using-the-decision-tree-algorithm-part-1-462j | machinelearning, ai, python, harrypotter | ## 1. Welcome to Hogwarts School of Witchcraft and Wizardry! 🏰🌟🔮
In the heart of the Scottish Highlands, hidden away from the prying eyes of Muggles, stands the majestic and ancient Hogwarts School of Witchcraft and Wizardry. Its towering spires and enchanting grounds have been home to countless generations of witches and wizards, each carving their path in the annals of magical history. Today, as the mist rises over the Forbidden Forest and the Giant Squid lazily drifts in the Great Lake, we embark on a new kind of magical journey. Welcome, dear young great minds, to a world where data science meets the arcane arts, led by none other than Professor Nugroho. 🌌✨
### 1.1 Introduction to Professor Nugroho ✨🧙♂️
Professor Nugroho, a close confidant of the venerable Albus Dumbledore, has dedicated his life to unraveling the mysteries of both magic and data. With a wand in one hand and a [Jupyter Notebook](https://jupyter.org/) on the other, he delves into the secrets of the magical universe. His office, tucked away in a quiet corner of Hogwarts, is a haven of books and scrolls, with enchanted quills scribbling notes and cauldrons bubbling with potions of knowledge. Today, we gather to learn from his wisdom, accompanied by his young son, **Gemika Haziq Nugroho**, an eager young sorcerer ready to embark on his own adventures at Hogwarts, with a heart full of curiosity and a wand full of potential. 📚🧙♂️
### 1.2 Meet Gemika Haziq Nugroho, an Eager Young Wizard 🌟🔮
Gemika, a spirited 8-year-old with a thirst for knowledge, often finds himself wandering through the castle’s corridors, discovering hidden passages and long-forgotten chambers. His inquisitive nature and boundless energy make him the perfect companion for our journey. Together, we will delve into the magical world of data, transforming mundane numbers into spells and enchantments that can sort the witches and wizards of Hogwarts into their rightful houses. 🏰🧙♀️
As we embark on this journey, picture yourself in the Great Hall, its enchanted ceiling reflecting the sky outside. The house tables are abuzz with students chattering excitedly, owls swooping down to deliver messages, and the aroma of a grand feast lingering in the air. Here, amidst the clinking of goblets and the laughter of friends, we will weave the threads of data into a tapestry of magic. Each step we take will be guided by Professor Nugroho's expertise and Gemika's curious questions, ensuring that no mystery remains unsolved. ✨🍽️
### 1.3 Prepare Your Sorcery Wands & Magic ✨
So, dust off your robes, polish your wands, and prepare your minds for a journey unlike any other. With the combined magic of Hogwarts and the precision of data science, we are about to uncover the secrets that lie within our enchanted dataset. Whether you are a seasoned witch or wizard, or a young sorcerer just beginning your magical education, this adventure promises to be filled with wonder, learning, and a sprinkle of Hogwarts' timeless charm. Welcome to the magical world of data science at Hogwarts! 🌟🔮🧙♂️
Feel the enchantment and get ready to learn like never before. As Professor Gerry Leo Nugroho often says, "_In every data point lies a spell waiting to be cast._" And with young Gemika by our side, let's make magic happen! Let's get ready to the [second part of our magical journey](https://dev.to/gerryleonugroho/the-gemikas-magical-guide-to-sorting-hogwarts-students-using-the-decision-tree-algorithm-part-2-hm4) 🎩🪄🌟. | gerryleonugroho |
1,913,991 | [Conceito] - Meus 3 Tipos Preferidos de Diagramas | Conteúdo original em https://x.com/zanfranceschi/status/1809646770361614528 Ei dev, Vou... | 0 | 2024-07-06T17:58:20 | https://dev.to/zanfranceschi/conceito-meus-3-tipos-preferidos-de-diagramas-20me | > Conteúdo original em https://x.com/zanfranceschi/status/1809646770361614528
Ei dev,
Vou compartilhar com você os tipos de diagramas que mais gosto e uso para desenhar soluções novas ou mapear soluções existentes.
Segue o fio. 🧵
---
Antes de mais nada, acho importante saber diferenciar desenhos ESTRUTURAIS e COMPORTAMENTAIS. Então se você não sabe, vale a pena dar uma lida sobre isso antes de prosseguir – já escrevi sobre isso nessa thread. 👇
Depois volta aqui.
https://x.com/zanfranceschi/status/1515015604977401857
---
DIAGRAMAS DE SEQUÊNCIA
De longe, esse é o diagrama que mais uso. Pra mim, ele é muito útil pra desenhar integrações entre serviços/aplicações.
Também é possível desenhar interações entre componentes dentro da mesma aplicação (no mesmo processo), mas raramente faço isso.
---
DIAGRAMAS DE COMPONENTES
Acho um bom diagrama pra mostrar dependências entre serviços. É uma visão estática que oferece um bom contexto duma solução. Diria que é uma alternativa mais técnica e menos descritiva aos primeiros níveis do modelo C4 do @simonbrown.
---
DIAGRAMA DE MÁQUINA DE ESTADOS
Uso com menos frequência, mas acho ele muito útil pra quando preciso modela ou entender os possíveis estados de algo mais complexo. Desenhá-los me ajuda a fixar e/ou fomentar o entendimento dessas coisas mais complexas.
---
Pra mim, essa é a frequência de uso dos diagramas:
- SEQUÊNCIA: muito frequente
- COMPONENTES: frequente (geralmente após desenhar diagramas de sequência)
- ESTADOS: pouco frequente (apenas quando preciso desenhar algo complexo o suficiente pra ser difícil de lembrar/decorar)
---
FERRAMENTAS
Eu praticamente só uso o drawio justamente por ter um bom suporte aos diagramas de sequência.
Dá pra fazer bons diagramas com mermaid ou plantuml – eles são bons porque você não perde tempo com alinhamentos. Mas são menos flexíveis e ficam ruins com modelos grandes.
---
Muita gente usa excalidraw, miro, etc. Mas por causa da falta de suporte ou suporte ruim aos diagramas de sequência, raramente uso essas ferramentas.
Cada pessoa se dá melhor com diferentes diagramas e o essencial no final é sempre se comunicar bem – com qualquer notação!
Fim. | zanfranceschi |
|
1,900,810 | The Gemika's Magical Guide to Sorting Hogwarts Students using the Decision Tree Algorithm (Part #2) | 2. Preparing Your Wand: Setting Up Your Magical Tools 🪄 Ah, young wizards and witches,... | 0 | 2024-07-06T23:20:44 | https://dev.to/gerryleonugroho/the-gemikas-magical-guide-to-sorting-hogwarts-students-using-the-decision-tree-algorithm-part-2-hm4 | machinelearning, ai, python, harrypotter | ## 2. Preparing Your Wand: Setting Up Your Magical Tools 🪄
_Ah_, young **wizards and witches**, before we can embark on our journey through the enchanted world of **data science**, we must first prepare our **wands** — or in this case, our computers. Just as a wand chooses the wizard, the right tools will choose the data scientist. For our journey into the enchanted realm of data science, we shall need the right incantations and artifacts—beginning with the installation of Python, the most essential of all.
Just as a wizard requires a wand, a data scientist requires Python to cast their spells. Let’s gather around the cauldron and brew a potion of installations, setting up [Python](https://www.python.org/) and [Jupyter Notebook](https://jupyter.org/), which will be our magical companions in this adventure. 🪄✨
## 2.1 **Installing Python**
As we gather in the dimly lit classroom of Professor McGonagall's Transfiguration, our wands at the ready, we must first ensure that our magical tools are properly prepared. For our journey into the enchanted realm of data science, we shall need the right incantations and artifacts—beginning with the installation of Python, the most essential of all. Just as a wizard requires a wand, a data scientist requires Python to cast their spells.
### 2.1.1 **Windows Operating System**
To summon Python on a Windows machine, visit the Python website and download the installer. Once downloaded, run the installer and be sure to check the box that says `"Add Python to PATH"` before you proceed. This ensures that the Python magic is accessible from anywhere on your system.
- Visit the [Python website](https://www.python.org/downloads/windows/).
- Download the latest version of Python.
- Run the installer and make sure to check the box that says `"Add Python
to PATH"` before clicking "Install Now".
### 2.1.2 **macOS Operating System**
For those with the heart of a lion and the spirit of a **Gryffindor**, macOS users can summon Python using Homebrew, a magical package manager. Open your Terminal and cast the following spells:
- Open the Terminal, if you don't know what a Terminal is or where to locate them, click the Launchpad icon in the Dock, type Terminal in the search field, then click Terminal. In the Finder , open the `/Applications/Utilities` folder, then double-click Terminal.
- Use [Homebrew](https://brew.sh/) (a package manager for macOS). If you don't have Homebrew, install it first by running:
```sh
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
```
- Once Homebrew is installed, run:
```sh
brew install python
```
### 2.1.3 **Linux Operating System**
The wizards and witches of the Linux world can summon Python using their distribution's package manager. For Debian-based systems, use apt-get
- Open the Terminal, using the shortcut key: The most common way to open the terminal is by pressing the `"Ctrl + Alt + T"` keys simultaneously. From the applications menu, some Linux distributions have a terminal icon in the applications menu that you can click to open.
- Run the following command to install Python:
```sh
sudo apt-get update
sudo apt-get install python3
```
With Python installed, our wands are now primed and ready for the next enchantment. ✨
---
## 2.2 Installing Libraries with Pip
Once Python is installed, we need to equip ourselves with the essential libraries. These libraries are like potion ingredients, each adding its own special property to our spells. We shall use pip, Python's package installer, to fetch these magical ingredients. To cast our data science spells, we need a few key libraries: `pandas`, `numpy`, `matplotlib`, and `seaborn`. Think of these as the potions and ingredients essential for our magical experiments from our Terminal.
```
# Install Pandas for data manipulation
pip install pandas
```
```
# Install NumPy for numerical operations
pip install numpy
```
```
# Install Matplotlib and Seaborn for data visualization
pip install matplotlib seaborn
```
```
# Install Scikit-Learn for machine learning algorithms
pip install scikit-learn
```
Here's the spell (script) to cast in your terminal:
```python
# Importing essential libraries (if needed)
import os
# Install necessary libraries
os.system('pip install pandas numpy matplotlib seaborn')
```
---
## 2.3 Installing Jupyter Notebook
_Ah_, Jupyter Notebook! Our magical parchment where we’ll inscribe our spells (code) and see the results unfold before our eyes. Jupyter Notebook is our enchanted scroll, a place where we can write, run, and visualize our code. It is where our spells come to life. To install Jupyter Notebook, is as simple as waving your wand, cast the following incantation in your command line :
```sh
pip install jupyter
```
To launch Jupyter Notebook, simply use:
```sh
jupyter notebook
```
This will open a portal (web browser) to the realm where our magical scripts will come to life. Here's a preview once you've managed to download and properly installed them. 🌟
---
## 2.4 Gemika's Pop-Up Quiz: Preparing Your Wand 🧙♂️✨
And now, a little challenge from young Gemika! Can you answer these questions to prove your readiness?
1. What command do you use to install Python on macOS?
2. How do you launch Jupyter Notebook after installation?
3. Name the four essential libraries we installed with pip.
Think carefully, and may your answers be as sharp as the fangs of a Hungarian Horntail! 🐉 Thus, with our wands (tools) at the ready, we are now prepared to delve deeper into the magical world of data science. Remember, the magic lies not just in the tools, but in how we wield them.
Together, we'll uncover secrets and make predictions that even the greatest seers would envy. Now, with our wands (or rather, our Python installations) at the ready, we are prepared to dive deeper into the magical world of data science. May your journey be filled with wonder and discovery! 🧙♂️✨ Onward, to our next adventure! 🧙♂️✨ | gerryleonugroho |
1,914,129 | Affordable Online MBA Options in Australia | In Australia is Universal Business School MBA Program Mba Online Australia you will find excellence... | 0 | 2024-07-06T23:01:02 | https://dev.to/universalbusinesssch/affordable-online-mba-options-in-australia-1aap | mba, in, australia | In Australia is Universal Business School MBA Program **[Mba Online Australia](https://www.ubss.edu.au/online-mba/)** you will find excellence juxtaposed with expansiveness in business education. mba online australia, online mba australia, australia business school, australian business school, Our MBA course is aimed at providing aspiring business leaders with the knowledge and skills for success across borders Contact us now for admission regarding.
| universalbusinesssch |
1,914,128 | [Game of Purpose] Day 49 - Bone collision detection | Today I started working on people receiving damage. My vision is that when the Drone drops a granade... | 27,434 | 2024-07-06T22:59:39 | https://dev.to/humberd/game-of-purpose-day-49-bone-collision-detection-3f2d | gamedev | Today I started working on people receiving damage. My vision is that when the Drone drops a granade and a person is in a close proximity of its explosion it should react naturally. If it's close enough they should loose their legs, arms, hands, etc. So I searched for tutorials and it turns out there are not that many. The remaining ones are very complex or for Unreal 4.
The one I found looking the most interesting is https://www.unrealengine.com/marketplace/en-US/product/procedural-dismemberment-system. It costs about 43 dollars, it's not that much compared to other products on the marketplace. I have not bought it yet. I need to sleep with it.
In the meantime I needed to somehow detect which bone the projectile hits, so that it can be dismembered. I started with a simple shooting projectile that only prints the bone it hits.
At first I had problems, because the FirstPerson content pack did not detect any bones. It turned out to be that the character collision capsule ate all the collisions. To make it ignore collisions with bullets I learned that you can create custom Object channels.
So I created a `Projectile` channel. Then each projectile was assigned to be a `Projectile` and then the collision capsule on a character was setup to ignore a collision from a `Projectile`.
And below is a result, where in the top left corner I can print the bone the projectile hits.
{% embed https://youtu.be/wPMGiuxLRWE %} | humberd |
1,914,127 | Javascript OOP | JavaScript and Object-Oriented Programming Obyektga yo'naltirilgan dasturlash OOP - bu dasturiy... | 0 | 2024-07-06T22:55:49 | https://dev.to/bekmuhammaddev/javascript-oop-2d8b | javascript, oop, aripovweb | **JavaScript and Object-Oriented Programming**
Obyektga yo'naltirilgan dasturlash OOP - bu dasturiy ta'minotni loyihalash va rivojlantirishda keng qo'llaniladigan yondashuv bo'lib, u ma'lumotlar va kodlarni obyektlar ko'rinishida tashkil etish orqali amalga oshiriladi. JavaScript ham OOP usullarini qo'llab-quvvatlaydi.Ob'ektga yo'naltirilgan dasturlash yoki OOP zamonaviy ilovalarni ishlab chiqish paradigmasi bo'lib, Java, C# yoki JavaScript kabi asosiy tillar tomonidan qo'llab-quvvatlanadi.
Oddiy misol JavaScript OOP ning asosiy tamoyillarini qanday amalga oshirishini ko'rishga yordam beradi. Savatingizga mahsulotlarni qo'yish va keyin to'lashingiz kerak bo'lgan umumiy narxni hisoblab chiqadigan xarid qilish holatini ko'rib chiqing. Agar siz JavaScript-dagi bilimingizni olsangiz va OOPsiz foydalanish holatini kodlasangiz, u quyidagicha ko'rinadi:
```
const non = {nomi: 'Non', narxi: 1};
const suv = {nomi: 'suv', nsrxi: 0.25};
```
OOP istiqboli yaxshiroq kod yozishni osonlashtiradi, chunki biz ob'ektlarni haqiqiy dunyoda duch kelganimizdek o'ylaymiz. Bizning foydalanish holatimiz mahsulotlar savatini o'z ichiga olganligi sababli, bizda allaqachon ikkita turdagi ob'ektlar mavjud - savat ob'ekti va mahsulot ob'ektlari.
```
const savat = [];
savat.push(non);
savat.push(non);
savat.push(non);
savat.push(suv);
savat.push(suv);
```
bu kod orqali savat nomli o'zgaruvchi ochiladi va maxsulotlar ya'ni non va suv push metodi orqali savat nomli o'zgaruvchiga saqlanadi va savatimizda objectlar mavjud bo'ladi
**class**
JavaScript-da class _sinf_ obyektlarni yaratish va ularni boshqarish uchun qo'llaniladigan yangi sintaksisdir. Classlar ES6 ECMAScript 2015 versiyasidan boshlab qo'llab-quvvatlanadi va bu obyektga yo'naltirilgan dasturlashni amalga oshirishda katta qulaylik yaratadi.
JavaScript-da Class
Class yaratish
```
class Person {
constructor(name, age, job) {
this.name = name;
this.age = age;
this.job = job;
}
// Method
sayHello() {
console.log(`Hello, my name is ${this.name}`);
}
}
// Classdan obyekt yaratish
let person1 = new Person("Alice", 25, "Designer");
person1.sayHello(); // "Hello, my name is Alice"
```
**Konstruktor**
constructor - bu sinfda maxsus metod bo'lib, u yangi obyekt yaratilganda avtomatik ravishda chaqiriladi. Konstruktor orqali obyektning dastlabki qiymatlari o'rnatiladi.
```
class Animal {
constructor(name, species) {
this.name = name;
this.species = species;
}
// Method
speak() {
console.log(`${this.name} makes a noise.`);
}
}
let animal1 = new Animal("Lion", "Mammal");
animal1.speak(); // "Lion makes a noise."
```
**Metodlar**
Class ichida metodlar aniqlash juda oson. Faqat metod nomini yozish va uni funksiya kabi belgilash kerak.
```
class Car {
constructor(brand, model) {
this.brand = brand;
this.model = model;
}
startEngine() {
console.log(`${this.brand} ${this.model} engine started.`);
}
}
let car1 = new Car("Toyota", "Corolla");
car1.startEngine(); // "Toyota Corolla engine started."
```
**Statik Metodlar**
Statik metodlar sinfning o'ziga tegishli bo'lib, ularni sinf nomi orqali chaqirish mumkin, obyektlar orqali emas.
```
class MathUtilities {
static add(a, b) {
return a + b;
}
}
console.log(MathUtilities.add(5, 3)); // 8
```
**Meros olish**
extends kalit so'zi orqali bir sinfni boshqa sinfdan meros olish mumkin. super kalit so'zi yordamida esa ota sinfning konstruktorini yoki metodlarini chaqirish mumkin.
```
class Employee extends Person {
constructor(name, age, job, salary) {
super(name, age, job); // Ota sinf konstruktorini chaqirish
this.salary = salary;
}
// Method
displaySalary() {
console.log(`Salary: ${this.salary}`);
}
}
let employee1 = new Employee("David", 28, "Developer", 50000);
employee1.sayHello(); // "Hello, my name is David"
employee1.displaySalary(); // "Salary: 50000"
```
JavaScript-da classlar obyektga yo'naltirilgan dasturlashni qulayroq va osonroq amalga oshirish imkonini beradi. Classlar yordamida kodni tartibga solish, qayta foydalanish va kengaytirish osonlashadi. Agar qo'shimcha savollaringiz bo'lsa yoki boshqa mavzular haqida bilmoqchi bo'lsangiz, marhamat, so'rang!
| bekmuhammaddev |
1,914,125 | Microservices vs Monolith | In the ever-evolving world of software development, selecting the right architecture for your... | 0 | 2024-07-06T22:46:28 | https://dev.to/wallacefreitas/microservices-vs-monolith-5gd0 | microservices, monolith, architecture | In the ever-evolving world of software development, selecting the right architecture for your application is crucial. Two popular approaches are Microservices and Monolithic architectures. Each has its strengths and challenges, and understanding them can help you make informed decisions for your projects.
🏛️ **Monolithic Architecture:**
Pros:
🌱 Simplicity: Easy to develop, test, and deploy.
🌱 Performance: Direct calls within a single application can be faster.
🌱 Consistency: One codebase means fewer integration points.
Cons:
🌱 Scalability Issues: Scaling requires duplicating the entire application.
🌱 Tight Coupling: Changes in one part can affect the entire system.
🌱 Deployment: Any update necessitates redeploying the whole application.
🧩 **Microservices Architecture:**
Pros:
🌱 Scalability: Scale individual services independently based on demand.
🌱 Flexibility: Use different technologies for different services.
🌱 Resilience: Fault isolation - a failure in one service doesn’t bring down the whole system.
Cons:
🌱 Complexity: Managing multiple services, their dependencies, and communication can be challenging.
🌱 Latency: Remote calls between services can introduce latency.
🌱 Deployment Overhead: More complex deployment and monitoring processes.
🧠 **Which to Choose?**
👉🏻 Startups and MVPs: Monolithic can be a good choice for rapid development and deployment.
👉🏻 Growing Applications: As your app scales, transitioning to Microservices can offer better performance and flexibility.
Remember, the best architecture depends on your specific use case, team expertise, and long-term goals. Both architectures can coexist, with many companies starting monolithic and evolving into microservices. | wallacefreitas |
1,914,122 | Building a Custom Enable/Disable + Input Field Component in Angular | Working with custom form components in Angular can be a game-changer for creating reusable and... | 0 | 2024-07-06T22:35:40 | https://dev.to/mateuscechetto/building-a-custom-enabledisable-input-field-component-in-angular-5bgc | angular, typescript, frontend | Working with custom form components in Angular can be a game-changer for creating reusable and maintainable code. Custom components not only encapsulate complex form logic but also enhance code readability and modularity. Today, let's dive into creating a custom field component that includes a switch and a number input. This component will work as an Adapter, integrating seamlessly with Angular's reactive forms.
### The Scenario
We need a field that lets the user check a box to enable a number input, and if its enabled, get its value. Breaking it down, we need:
- A switch (checkbox) to enable or disable a number input.
- When the switch is off, the number input should be disabled, and its value should be set to undefined.
- The form should have the value 0 when the switch is off, and the number input's value when the switch is on.
As we can see, we have 2 fields (the checkbox and the number input) but we want only one value in the form; and that value isn't always 1 to 1 the value of the number input. To handle this logic, we will create a Custom Field Component to work as an Adapter.
Let's get started!
#### Step 1: Generate the Custom Component
First, create a new component called custom-field:
```
ng generate component custom-field
```
#### Step 2: Implement the Component Logic
We'll implement `ControlValueAccessor` interface to hook our custom component into Angular's reactive forms. By doing this, our component will act as an adapter, translating the complex internal state into a form-compatible interface.
The ControlValueAccessor interface allows Angular to communicate with custom form components. It acts as an adapter between Angular's form API and the custom component, providing methods to read from and write to the form control. It consists on 4 methods: `writeValue(obj: any)`, `registerOnChange(fn: any)`, `registerOnTouched(fn: any)`, `setDisabledState?(isDisabled: boolean)`, the last being optional.
- **writeValue(obj: any)**: This method is used to update the component's value when the form control's value changes.
- **registerOnChange(fn: any)**: This method is used to register a callback function that Angular will call when the component's value changes.
- **registerOnTouched(fn: any)**: This method is used to register a callback function that Angular will call when the component is touched.
- **setDisabledState?(isDisabled: boolean)**: This optional method is used to update the component's disabled state.
> For an easier understanding of the usage of the interface, we can compare `writeValue()` with a component `@Input` and `onChange()` with a component `@Output`.
custom-field.component.html:
``` html
<div>
<label>
<input
type="checkbox"
[(ngModel)]="isSwitchOn"
(change)="onSwitchChange()"
/>
Enable Number Input
</label>
<input
type="number"
[(ngModel)]="numberValue"
[disabled]="!isSwitchOn"
(ngModelChange)="onNumberChange($event)"
/>
</div>
```
custom-field.component.ts:
``` ts
@Component({
selector: 'app-custom-switch-input-field',
templateUrl: './custom-switch-input-field.component.html',
styleUrls: ['./custom-switch-input-field.component.scss'],
providers: [
{
provide: NG_VALUE_ACCESSOR,
useExisting: forwardRef(() => CustomSwitchInputFieldComponent),
multi: true,
},
],
})
export class CustomSwitchInputFieldComponent implements ControlValueAccessor {
isSwitchOn = false;
numberValue: number | undefined;
private onChange: any = () => {};
private onTouched: any = () => {};
writeValue(value: number): void {
this.isSwitchOn = value !== 0;
this.numberValue = this.isSwitchOn ? value : undefined;
}
registerOnChange(fn: any): void {
this.onChange = fn;
}
registerOnTouched(fn: any): void {
this.onTouched = fn;
}
onSwitchChange() {
if (!this.isSwitchOn) {
this.numberValue = undefined;
this.onChange(0);
} else {
this.numberValue = 0;
}
this.onTouched();
}
onNumberChange(value: number) {
if (this.isSwitchOn) {
this.onChange(value);
}
this.onTouched();
}
}
```
#### Step 3: Integrate with the Parent Component
Let's integrate with a parent component to use our custom field component within a reactive form.
parent.html:
``` html
<form [formGroup]="form">
<app-custom-switch-input-field formControlName="customField"></app-custom-switch-input-field>
</form>
```
parent.ts:
``` ts
form!: FormGroup;
constructor(private fb: FormBuilder) {}
ngOnInit() {
this.form = this.fb.group({
customField: [0], // Default value
});
}
```
### Examples and Use Cases
Here are a few more examples of how the custom field component can be used in different scenarios:
**Example 1: Configuring Product Options**
Imagine a form for configuring product options where certain features can be enabled or disabled, and the corresponding input fields are adjusted accordingly. This is useful in e-commerce platforms where products can have optional add-ons.
**Example 2: Conditional Form Fields**
In a survey form, certain questions may appear only if specific options are selected. For instance, if a user selects "Yes" to a question about owning a vehicle, additional fields about the vehicle may appear. The custom field component can handle enabling and disabling input fields based on user selections.
### Conclusion
By implementing ControlValueAccessor, we created a custom field component that integrates smoothly with Angular's reactive forms. Acting as an adapter, this component translates a complex internal state into a form-compatible interface. This approach encapsulates the logic of the field, enhances reusability and ensures that our forms are easier to maintain and extend. [You can check the full code on github.](https://github.com/mateuscechetto/custom-field-switch-input) | mateuscechetto |
1,914,120 | Comment héberger une application Express sur Vercel | La semaine dernière, j'ai dû héberger une application Express simple quelque part, et j'ai choisi... | 0 | 2024-07-06T22:28:19 | https://dev.to/abdelkarimain/comment-heberger-une-application-express-sur-vercel-5h26 | express, node, vercel, webdev | La semaine dernière, j'ai dû héberger une application Express simple quelque part, et j'ai choisi Vercel en raison de son excellente expérience pour les développeurs.
---
Voici les étapes que j'ai suivies pour y parvenir :
Tout d'abord, nous devons créer un répertoire de projet. J'ai décidé de l'appeler vercel-express et de changer ensuite le répertoire vers ce nouveau répertoire créé.
```bash
# Créer un répertoire
mkdir vercel-express
# Changer de répertoire
cd vercel-express
```
Ensuite, nous initialisons git et ajoutons le répertoire `node_modules` à `.gitignore`.
```bash
# Initialiser git
git init
# Ajouter le répertoire `node_modules` à `.gitignore`
echo node_modules >> .gitignore
```
Ensuite, nous configurons un nouveau package. Nous utilisons le drapeau -y pour éviter le questionnaire.
```bash
npm init -y
```
Ensuite, nous allons créer un fichier index.js et le remplir.
```bash
# Créer un nouveau fichier `index.js`
touch index.js
```
```javascript
// ./index.js
const express = require('express')
const app = express()
const port = 3000
app.get('/', (req, res) => {
res.send('Hello, Vercel!')
})
app.listen(port, () => {
console.log(`Application Express hébergée sur Vercel écoutant sur le port ${port}`)
})
```
Après avoir rempli les fichiers index.js et vercel.json, nous pouvons mettre en scène tous les fichiers et les valider.
```bash
git add -A && git commit -m "Premier commit"
```
Si vous souhaitez changer le nom de la branche principale de master à main, exécutez simplement la commande git branch -m master main.
Pour pousser du code vers le dépôt existant, suivez le code suivant.
```bash
git remote add origin https://github.com/username/code_repo.git
git branch -M main
git push -u origin main
```
Le fichier de configuration Vercel inclut des propriétés héritées, mais il fonctionne parfaitement au moment de la rédaction de cet article. Peut-être que dans le futur, je mettrai à jour le tutoriel avec les propriétés recommandées. | abdelkarimain |
1,911,917 | Introduction to Functional Programming in JavaScript: Function compositions #4 | Function composition is a powerful technique in functional programming that allows you to build... | 0 | 2024-07-06T22:00:00 | https://dev.to/francescoagati/introduction-to-functional-programming-in-javascript-function-compositions-4-5hjm | javascript | Function composition is a powerful technique in functional programming that allows you to build complex functions by combining simpler ones. It promotes modularity, reusability, and readability in your code, making it easier to reason about and maintain.
#### What is Function Composition?
Function composition is the process of combining two or more functions to produce a new function. The new function applies each of the original functions in sequence, passing the output of one function as the input to the next. This allows you to build complex operations from simpler, reusable building blocks.
Mathematically, function composition is often represented as:
\[ (f \circ g)(x) = f(g(x)) \]
In this notation, \( f \) and \( g \) are functions, and \( \circ \) denotes composition. The expression means that the function \( g \) is applied to \( x \), and then the function \( f \) is applied to the result of \( g(x) \).
#### Implementing Function Composition in JavaScript
JavaScript provides several ways to implement function composition. Let's look at some examples:
1. **Manual Composition**
```javascript
const add = (x) => x + 1;
const multiply = (x) => x * 2;
const composedFunction = (x) => multiply(add(x));
console.log(composedFunction(5)); // 12
```
In this example, `composedFunction` manually composes `add` and `multiply`, applying them in sequence to the input value.
2. **Generic Composition Function**
You can create a generic composition function to compose any number of functions:
```javascript
const compose = (...functions) => (initialValue) =>
functions.reduceRight((value, func) => func(value), initialValue);
const add = (x) => x + 1;
const multiply = (x) => x * 2;
const composedFunction = compose(multiply, add);
console.log(composedFunction(5)); // 12
```
The `compose` function takes a variable number of functions as arguments and returns a new function. This new function uses `reduceRight` to apply the functions in right-to-left order, passing the result of each function as the input to the next.
3. **Using Utility Libraries**
Libraries like Lodash provide built-in methods for function composition, such as `_.flowRight`:
```javascript
const _ = require('lodash');
const add = (x) => x + 1;
const multiply = (x) => x * 2;
const composedFunction = _.flowRight(multiply, add);
console.log(composedFunction(5)); // 12
```
Lodash's `_.flowRight` (also known as `_.compose` in some libraries) simplifies the process of composing functions, making your code more concise and readable.
#### Benefits of Function Composition
- **Modularity**: By breaking down complex operations into smaller, reusable functions, function composition promotes modularity in your codebase.
- **Reusability**: Composable functions can be reused in different contexts, reducing duplication and improving maintainability.
- **Readability**: Function composition allows you to express complex logic in a clear and declarative manner, making your code easier to understand.
- **Testability**: Smaller, composable functions are easier to test individually, leading to more robust and reliable code.
#### Practical Applications of Function Composition
1. **Data Transformation**
Function composition is particularly useful for transforming data through a series of operations:
```javascript
const toUpperCase = (str) => str.toUpperCase();
const trim = (str) => str.trim();
const exclaim = (str) => `${str}!`;
const transform = compose(exclaim, toUpperCase, trim);
console.log(transform(' hello world ')); // 'HELLO WORLD!'
```
In this example, `transform` composes `trim`, `toUpperCase`, and `exclaim` to clean up and format a string.
2. **Middleware in Web Applications**
Function composition is often used in middleware stacks, such as in Express.js:
```javascript
const logger = (req, res, next) => {
console.log(`${req.method} ${req.url}`);
next();
};
const authenticate = (req, res, next) => {
if (req.user) {
next();
} else {
res.status(401).send('Unauthorized');
}
};
const composedMiddleware = (req, res, next) => {
logger(req, res, () => authenticate(req, res, next));
};
app.use(composedMiddleware);
```
In this example, `composedMiddleware` combines `logger` and `authenticate` into a single middleware function, ensuring that both functions are applied to each request.
3. **Function Pipelines**
Similar to function composition, function pipelines apply functions in a left-to-right order. While not natively supported in JavaScript, you can create a simple pipeline function:
```javascript
const pipe = (...functions) => (initialValue) =>
functions.reduce((value, func) => func(value), initialValue);
const add = (x) => x + 1;
const multiply = (x) => x * 2;
const pipedFunction = pipe(add, multiply);
console.log(pipedFunction(5)); // 12
```
The `pipe` function is similar to `compose` but applies functions in left-to-right order, which can be more intuitive in some cases.
| francescoagati |
1,914,118 | A1 To B1.2 Without a Teacher | I learned German without a teacher. Yes without a teacher and all from the Internet. Let me tell you... | 0 | 2024-07-06T21:50:09 | https://dev.to/justjay30a7i/a1-to-b12-without-a-teacher-17l0 | I learned German without a teacher. Yes without a teacher and all from the Internet.
Let me tell you how!
My journey started in the middle of September after my last birthday. At first I had no study routines for learning the language, so just like if you asked a toddler about something today, I did the predictable. Opened up YouTube and typed in "How to learn German". The first few results were the one that I'll ride with the whole journey. It was an A1 Playlist from "Learn German", a channel that is made by a wonderful teacher who in all of her videos neither over explain nor under explain. She's teaching the language in a sequence of 10 minute videos. 60+ Videos for the first level [A1]. 40+ Videos for the second level [A2]. 40+ Videos for the third level [B1]. Which all sum up to around 1500 minutes, dividing by 60, we get 25 hours. A question popped in mind, can I really reach B1 in German through a 25 hours course?
Should I lower my expectation?. Well, Imagining and wondering won't answer the question, but trying will. I started my Journey.
3 weeks pass by and my sister recommends me a book series called MENSCHEN (English Translation: People). I get excited, since I like reading and learning and I expect that a book series would have more exercises for me to practice writing, reading, and even listening to the language. I hop on into the internet and start looking out for that series. A problem appears! it's too long and too heavy for me to carry both a Course Book and An Exercising Book side to side with a YouTube Series. And I really started getting used to the teacher on YouTube. Her videos are enjoyable and makes me like the language more and to some extent I feel less lonely learning because there are people in the comments thanking her and giving updates on their progress on every video just like myself.
I had an awesome Idea. Why not learn the Theoretical side of the language from the YouTube Series and exercise with the Work-Book? I start applying this style of studying. Learning a Lesson, digging up the exercises and repeat.
It's working, I'm noticing my progress through watching some German Memes on the Internet every now and then for a good laugh while also training my eyes and ears.
And that was the pillar that supported my German until I delved into the German culture, music, humor, news media and so on. Which was right after I finished the A2 Playlist and started with my B1 Playlist and Books. But that's a story for the next Week.
Follow me so you get tuned when I post the rest of the Journey.
[Links For The [Books ](http://www.germanbookhaus.com/beginners/young-adults/menschen/)And The [YouTube Channel](https://www.youtube.com/@LearnGermanOriginal)]
| justjay30a7i |
|
1,910,480 | Vercel's latest product is the best thing since sliced bread | all opinions are my own and don't reflect my employers in any way (even though it should). I write... | 0 | 2024-07-06T21:49:40 | https://dev.to/bibschan/vercels-latest-product-is-the-best-thing-since-sliced-bread-29c4 | webdev, nextjs, ai, news |
**_all opinions are my own and don't reflect my employers in any way (even though it should). I write with a humorous flair and if you get butt hurt that's your problem ٩(＾◡＾)۶_**
You should know by now that I'm a NextJS evangelist, so it should come as no surprise that I'm knocking door to door spreading the Vercel gospel yet again -- BUT, hold on to your seats my dear devs... because today, I bring a fresh-out-of-the-oven tool for y'all to delight yourselves with. **Enter our lord and savior, v0**.
---
<img width="100%" style="width:100%" src="https://i.giphy.com/media/v1.Y2lkPTc5MGI3NjExcjZpMTB4aWJxMmU2cmxvMzB3OXIzbnR2cnlmNGU4b2lqZWJwaW9iNCZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/dX3dMAyBWYyAV4zhOm/giphy.gif">
---
v0 is Vercel's newest addition to their product catalog, it is a **Generative UI** tool that uses simple text prompting and images to generate pages for you. Forget boilerplate code and templates, v0 aims to take you from a blank screen to a complete page faster than ever before!
**But how does it work?** After you submit your prompt, the platform gives you three choices of AI-generated user interfaces. You can pick one, copy the entire source code generated, or refine it further until you get what you want!
Sounds like any other AI tool out there, right? Yes and no. Yes, it's AI. But no, it's better than anything else out there. These are just some of its initial key features:
1. **Follow up prompting:** v0 allows you to endlessly refine the UI to your own taste using prompts, zero code involved! You can select individual parts of the UI to fine tune your creation.
<img width="100%" style="width:100%" src="https://cdn.discordapp.com/attachments/1258446643888656404/1258459529289662555/2.gif?ex=66881f44&is=6686cdc4&hm=7b69b4b3130e4ce4accfad6240e2d03c3ef10f460239e04ac55f014313e16c48&">
---
2. **Switch between canvas and code:** seamlessly make code and UI adjustments on the fly, your changes are reflected instantly on the generated UI. Think of Webflow meets VS Code!
<img width="100%" style="width:100%" src="https://cdn.discordapp.com/attachments/1258446643888656404/1258459528320520192/1.gif?ex=66881f44&is=6686cdc4&hm=2a209815bfd13d0adbb1d61b04a03984000ea1707e9755abe39898b31db1010e&">
---
3. **Public/private mode and community templates:** Browse through what others have published to the community, giving you an even better starting point reference. Alternatively, you can keep your work in stealth and no one will know what you're cooking!
<img width="100%" style="width:100%" src="https://cdn.discordapp.com/attachments/1258446643888656404/1258459528802992228/3.gif?ex=66881f44&is=6686cdc4&hm=2235d560d2cdefac85f4a7d19f1faeaeedb9524aedb8e44e5b9e6663efd9329f&">
---
4. **Leverage ShadCN/UI and Tailwind:** You get pre-built, open-source, fully responsive UI components with [ShadCN](https://ui.shadcn.com/) and industry-standard Tailwind. Because nobody wants to pay for [MaterialUI](https://mui.com/material-ui/) 👀
<img width="100%" style="width:100%" src="https://cdn.discordapp.com/attachments/1258446643888656404/1258459527527927808/4.gif?ex=66881f44&is=6686cdc4&hm=a0d870af863560b47088c4acb9de7b52bd59e0ee347a7357a561978b72a4d62b&">
---
**A note on accessibility** -- While v0 does generate ARIA attributes to incorporate accessibility standards, it still leaves room for improvement in terms of inclusive design. I can assure you though, it's more than what your company is doing for accessibility anyway 👀
---
## My thoughts on v0 ໒(⊙ᴗ⊙)७✎▤
While the tool is currently focused on frontend code generation and can't perform data fetching yet, we can expect this feature to be around with the official alpha release. While testing it myself, I noticed it generates somewhat generic code, but eventually, I know for a fact it will integrate with your existing code and design system, allowing it to contextualize the output and create that seamless experience that we developers love -- a good copy and paste that just works!
Now, I want to wrap this article with a prediction. Two years down the road, vanilla React will be gone and forgotten. NextJS will take over as the most popular framework and Vercel will release a CLI version of v0 with some neat VS Code plugins. Frontend engineering will be more about prompting these tools for the best output, rather than coding useless media-queries.
We'll have to wait to find out, and in the meantime, I shall continue spreading the word door to door...
---
<img width="100%" style="width:100%" src="https://media.giphy.com/media/v1.Y2lkPTc5MGI3NjExeTFwcXowd2RoNXowa2I4NGV1cTR5bHVpYm5mNHNkZGMxbG4zeXg1diZlcD12MV9naWZzX3NlYXJjaCZjdD1n/zOwzTlnOnx1T9JZgql/giphy.gif">
_Do you have five minutes to hear the word of our lord and saviour today?_
---
Play with v0 and see the magic for yourself: https://v0.dev/
Thanks for reading my silly article ๑(◕‿◕)๑~~~ | bibschan |
1,914,117 | 8 Months Recap. | 8 Months Recap. Back on Saturdays just like before, here's why I stopped posting about my growth... | 0 | 2024-07-06T21:48:21 | https://dev.to/justjay30a7i/8-months-recap-4hh2 | devjournal, webdev, gamedev, german |
8 Months Recap.
Back on Saturdays just like before, here's why I stopped posting about my growth here for the past 8 months. Last September I started learning German, completely on my own. No courses, no language schools, no online tutoring. Just me and grammar books and YouTube videos explaining them.
At first I was skeptical that I'm going to achieve this huge goal, but as things took off and I started understanding German content on the Internet, I felt that there may be some hope.
The Final goal was to reach the intermediate level or according to The Common European Framework of Reference for Languages (CEFR), the goal was to pass an acknowledged B1 exam such as Goethe's. And yesterday, the news came, the good news if I may. An email from the institute with the opening line: "Herzlichen Glückwunsch! Sie haben die Prüfung Goethe-Zertifikat B1 erfolgreich abgelegt." which directly translates to "Congratulations! You have successfully passed the Goethe-Zertifikat B1 examination.". Off course I was happy because I passed the test, but there was more to it. See dear reader, passing the exam on my own increased my self confidence by at least ten times. Because the Image in mind started to get clear that if I planned something well and poured my effort into it as well, good things will happen.
I Took the TOEFL last year completely on my own and got a solid 87 out of 120. I Took Goethe B1 Exam this year and nailed a 91 in writing, an 85 in speaking, an 80 in reading and finally a 63 in listening. Now the the last one was a shock to me especially seeing the huge margin between it and the other marks. Moreover, one of the things that helped me getting better at German were the audio-books and the German music I listened to, so how come I score the least on the thing I did the most? Personally I believe it was the stress of the exam.
I was so fearful of the dialects (especially the Swiss one) and I have to admit it. No matter the reason, there's one clear thing to me now. I have to practice more, I have to give more time and effort consistently to improve on this awesome skill I acquired. And I'll do that side to side with the journey I'm starting next month. I will start learning JS as it's the last element in my skill chain as a web-developer that I haven't collected yet. Next Saturday, I'm going to speak about the resources I used to learn German and the incredible series of "MENSCHEN". Until then, friends! | justjay30a7i |
1,914,115 | Sure Predictions | SurePredictions.net is renowned as the premier destination for accurate soccer predictions globally.... | 0 | 2024-07-06T21:39:41 | https://dev.to/sure_predictions_a78719b8/sure-predictions-12p6 | [SurePredictions.net](https://surepredictions.net) is renowned as the premier destination for accurate soccer predictions globally. Our expert analysts provide reliable football tips, ensuring high confidence in our sure predictions for today's matches.
Here are the links in markdown format:
- [Must Win Teams Today](https://surepredictions.net/blog/must-win-teams-today)
- [Bet2Win](https://surepredictions.net/blog/bet2win)
- [Loyal Tips](https://surepredictions.net/blog/loyal-tips)
- [Sure Predictions](https://surepredictions.net)
- [Draw Tips](https://surepredictions.net/tips-store/draw)
- [Double Chance Tips](https://surepredictions.net/tips-store/double-chance)
- [BTTS Tips](https://surepredictions.net/tips-store/btts)
- [0.5 HT Tips](https://surepredictions.net/tips-store/0.5HT)
- [Over 1.5 Goals Tips](https://surepredictions.net/tips-store/over-1.5-goals)
- [Over 2.5 Goals Tips](https://surepredictions.net/tips-store/over-2.5-goals)
- [Win Either Half Tips](https://surepredictions.net/tips-store/win-either-half)
- [Under 3.5 Goals Tips](https://surepredictions.net/tips-store/under-3.5-goals)
- [Handicap Prediction Tips](https://surepredictions.net/tips-store/handicap-prediction) | sure_predictions_a78719b8 |
|
1,914,114 | Howdy! | Glad to be here in the dev.to community. We've recently announced a new developer productivity tool... | 0 | 2024-07-06T21:36:36 | https://dev.to/whattheportal/howdy-bpd | webdev, javascript, programming, devops | Glad to be here in the dev.to community.
We've recently announced a new developer productivity tool called What the Portal (as you might have guessed by our name!) and are looking for some beta testers.
If you're curious to give it a whurl, we'd love the feedback!
The announcement post is on our Org page here:
https://dev.to/what-the-portal/introducing-what-the-portal-n8n
Hit us up in our discord and we'll get ya in:
https://whattheportal.com/discord | whattheportal |
1,914,113 | Day 6 of 100 Days of Code | Sat, July 6, 2024 Yesterday I spent reviewing CSS and CSS projects. CSS seems an important base to... | 0 | 2024-07-06T21:29:45 | https://dev.to/jacobsternx/day-6-of-100-days-of-code-4dkg | 100daysofcode, beginners, webdev, javascript | Sat, July 6, 2024
Yesterday I spent reviewing CSS and CSS projects. CSS seems an important base to be able to later employ media queries and React to structure HTML.
I looked at a couple VS Code time tracking extensions, but most of my time is spent in the browser, so I'll review this later, but [CodeTime](https://codetime.dev/en/) has some nice features, including nice summary and data visualizations, all data is kept indefinitely with full control, and there's a free level. However, there were some issues initializing the API token, so I'll call it a beta release. If anyone has a good experience either using an extension for VS Code and Chrome to track your coding time, or another approach, please share in the comments!
My remaining lessons for Codecademy Web Dev Foundations course:
Developing Websites Locally
Deploying Websites
Improved Styling with CSS
Making a Website Responsive
While these lessons look attainable, I'm unfamiliar with their material, so I'll target one lesson per day and see how quickly I can move on to the second Codecademy course, Building Interactive Websites, starting with JavaScript. Back to it now. | jacobsternx |
1,914,112 | Programar y cocinar, primos hermanos son | Corría el año 1999 y un jovenzuelo Jorge hacía su primer viaje transoceánico y visitaba Costa Rica... | 0 | 2024-07-06T21:28:51 | https://dev.to/jagedn/programar-y-cocinar-primos-hermanos-son-39g5 | personal, spansih | Corría el año 1999 y un jovenzuelo Jorge hacía su primer viaje transoceánico y visitaba Costa Rica (imposible olvidar ese viaje y los otros 3 que le sucedieron)
Sentados en un puesto callejero en Puerto Viejo veíamos a la cocinera preparar las cenas que le íbamos encargando. El puesto eran un par de mesas corridas, unos fogones, un lavadero y poco más pero el gallo pico con leche de coco que nos comimos me supo a gloria.
Mientras yo salivaba viendo a aquella mujer desenvolverse entre los fogones y tuppers mi maestro y mentor Fran, con el que viajaba, la observaba:
> fíjate cómo va limpiando y guardando los cacharros a medida que los usa y de esa manera aprovecha el poco espacio que tiene. Eso es lo que define a un buen cocinero, no el hacer un plato espectacular pero dejando la cocina como si hubiera caído una bomba, sino el hacer un plato sabroso y que parezca que no ha hecho nada. Pues algo así es programar
(más o menos, no me puedo acordar exactamente)
Yo devoraba ya mi plato, pero si algo aprendí desde que le conocí era a guardar sus comentarios y volver a ellos más tarde.
Y esta frase viene a menudo a mí, sobre todo en días como hoy que me encargo de hacer el arroz con cosas para la tropa, y con la excusa de que requiere concentración me abstraigo y me imagino teniendo la conversación que mi colega esperaba
- Pues sí, si en algo se parece programar es a cocinar. En ambas necesitas una planificación, una receta ...
- Experiencia ...
- Sí, correcto, pero ojo la experiencia no es solo que se hace día a día, sino cagándola y repitiendo
- Claro, además tienes las recetas, es sólo seguirlas y ya
- Ufff, para nada, una receta te sirve para tener la planificación y la idea del resultado final pero cada comida, como cada proyecto, es única. Además está bien seguir la receta pero al ser un algo único deberías sentir la necesidad de hacerla especial e innovar algún punto. Tal vez un ingrediente nuevo, tal vez cambiar el orden...
- Y volviendo a nuestra cocinera, todo aquel que programe debería ser como ella: ir limpiando las cosas a medida que las usas y tener así un entorno ordenado, con todo a la vista y cada cosa en su sitio, sin importar si ese cacharro lo vas a tener que volver a usar dentro de un rato otra vez
...
Horas y horas de conversación se me pasan en mi cabeza durante esos 30 minutos que termina el arroz en hacer chupchup.
"Horas" de conversaciones donde sigo dialogando con mi colega Fran y buscamos similitudes entre cocinar y programar
Pero lo peor son que esas "horas" de conversaciones sólo consigo plasmarlas en 10 párrafos de un artículo
| jagedn |
1,914,111 | Algorithmic Trading Architecture and Quants: A Deep Dive with Case Studies on BlackRock and Tower Research | (https://dev-to-uploads.s3.amazonaws.com/uploads/articles/t044ftmmhixpbqma1io7.png) Algorithmic... | 0 | 2024-07-06T21:26:22 | https://dev.to/nashetking/algorithmic-trading-architecture-and-quants-a-deep-dive-with-case-studies-on-blackrock-and-tower-research-55ao | quant, webdev, coding, software |
(https://dev-to-uploads.s3.amazonaws.com/uploads/articles/t044ftmmhixpbqma1io7.png)
Algorithmic trading, or "algo trading," involves using computer programs and algorithms to trade securities. These algorithms execute pre-defined strategies at speeds and frequencies that a human trader cannot match. This article delves into the architecture of algorithmic trading systems, the role of quants, and explores case studies from industry giants BlackRock and Tower Research. We will also provide step-by-step implementation examples, code snippets, calculations, and real-world examples from the London Stock Exchange (LSE) and the Singapore Exchange (SGX) over the past 25 years.
## Algorithmic Trading Architecture
### 1. **Market Data Feed Handlers**
Algo trading systems begin with market data feed handlers, which receive real-time data from various exchanges. These handlers process, filter, and normalize the data for the subsequent components.
### 2. **Strategy Engine**
The strategy engine is the core of the algo trading system. It runs the trading algorithms and makes trading decisions based on the incoming data. Strategies can range from simple rules to complex mathematical models.
### 3. **Order Management System (OMS)**
The OMS is responsible for managing and executing orders. It ensures that the orders are sent to the market, filled correctly, and that any necessary modifications or cancellations are handled.
### 4. **Risk Management**
Risk management systems monitor the trading activities in real-time to ensure compliance with predefined risk parameters. They can halt trading activities if the risk thresholds are breached.
### 5. **Execution Management System (EMS)**
The EMS optimizes the execution of orders. It determines the best possible way to execute a trade, taking into account factors like order size, market conditions, and transaction costs.
### 6. **Backtesting and Simulation**
Before deploying strategies, they are rigorously tested using historical data. This process, known as backtesting, helps in understanding the performance and potential pitfalls of the strategy.
### 7. **Latency and Infrastructure**
Latency is a critical factor in algorithmic trading. High-frequency trading (HFT) firms invest heavily in low-latency infrastructure, including direct market access (DMA), co-location of servers, and high-speed communication networks.
### 8. **Compliance and Reporting**
Algo trading systems must adhere to regulatory requirements. Compliance modules ensure that trading activities comply with legal standards, and reporting modules generate necessary reports for regulatory bodies.
## The Role of Quants
Quantitative analysts, or quants, are the backbone of algorithmic trading. They use mathematical models, statistical techniques, and programming skills to develop trading strategies. Their work involves:
- **Data Analysis:** Sifting through vast amounts of historical and real-time data to identify patterns and trends.
- **Model Development:** Creating mathematical models to predict price movements and optimize trading strategies.
- **Strategy Implementation:** Coding the strategies into algorithms and integrating them with the trading system.
- **Risk Assessment:** Evaluating the risk associated with each strategy and ensuring it aligns with the firm’s risk appetite.
## Step-by-Step Implementation of an Algorithmic Trading Strategy
### Example Strategy: Mean Reversion
Mean reversion is a popular trading strategy that assumes prices will revert to their historical mean. Here’s a step-by-step implementation with code snippets in Python.
#### Step 1: Import Libraries
```python
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
from datetime import datetime
import yfinance as yf
```
#### Step 2: Fetch Historical Data
We use the `yfinance` library to fetch historical stock data.
```python
ticker = "AAPL"
start_date = "2020-01-01"
end_date = "2023-01-01"
data = yf.download(ticker, start=start_date, end=end_date)
```
#### Step 3: Calculate Moving Averages
We calculate the short-term and long-term moving averages.
```python
short_window = 40
long_window = 100
data['short_mavg'] = data['Close'].rolling(window=short_window, min_periods=1).mean()
data['long_mavg'] = data['Close'].rolling(window=long_window, min_periods=1).mean()
```
#### Step 4: Generate Trading Signals
We generate buy and sell signals based on the moving averages.
```python
data['signal'] = 0.0
data['signal'][short_window:] = np.where(data['short_mavg'][short_window:] > data['long_mavg'][short_window:], 1.0, 0.0)
data['positions'] = data['signal'].diff()
```
#### Step 5: Backtest the Strategy
We backtest the strategy to evaluate its performance.
```python
initial_capital = float(100000.0)
positions = pd.DataFrame(index=data.index).fillna(0.0)
positions[ticker] = 100*data['signal']
portfolio = positions.multiply(data['Close'], axis=0)
pos_diff = positions.diff()
portfolio['holdings'] = (positions.multiply(data['Close'], axis=0)).sum(axis=1)
portfolio['cash'] = initial_capital - (pos_diff.multiply(data['Close'], axis=0)).sum(axis=1).cumsum()
portfolio['total'] = portfolio['cash'] + portfolio['holdings']
portfolio['returns'] = portfolio['total'].pct_change()
```
#### Step 6: Plot the Results
We visualize the strategy's performance.
```python
fig = plt.figure()
ax1 = fig.add_subplot(111, ylabel='Portfolio value in $')
portfolio['total'].plot(ax=ax1, lw=2.)
data['signal'].plot(ax=ax1, lw=2.)
ax1.plot(data.loc[data.positions == 1.0].index,
data.short_mavg[data.positions == 1.0],
'^', markersize=10, color='m')
ax1.plot(data.loc[data.positions == -1.0].index,
data.short_mavg[data.positions == -1.0],
'v', markersize=10, color='k')
plt.show()
```
### Explanation and Conditions
- **Buy Signal:** Generated when the short-term moving average crosses above the long-term moving average.
- **Sell Signal:** Generated when the short-term moving average crosses below the long-term moving average.
## Real-World Examples from LSE and SGX
### London Stock Exchange (LSE)
#### Example 1: Mean Reversion on LSE
Let's consider a mean reversion strategy implemented on the FTSE 100 index.
#### Step 1: Fetch Historical Data
We fetch the historical data for the FTSE 100 index.
```python
ticker = "^FTSE"
start_date = "2000-01-01"
end_date = "2023-01-01"
data = yf.download(ticker, start=start_date, end=end_date)
```
#### Step 2-6: Similar to the steps outlined above for mean reversion strategy
By applying the same steps to the FTSE 100 index data, we can observe how the strategy performs on the LSE.
### Singapore Exchange (SGX)
#### Example 2: Momentum Trading on SGX
Momentum trading is another popular strategy. Let's implement a simple momentum strategy on the STI index.
#### Step 1: Fetch Historical Data
```python
ticker = "^STI"
start_date = "2000-01-01"
end_date = "2023-01-01"
data = yf.download(ticker, start=start_date, end=end_date)
```
#### Step 2: Calculate Momentum
We calculate the momentum as the percentage change in price over a certain period.
```python
momentum_window = 20
data['momentum'] = data['Close'].pct_change(momentum_window)
```
#### Step 3: Generate Trading Signals
We generate buy and sell signals based on momentum.
```python
data['signal'] = 0.0
data['signal'] = np.where(data['momentum'] > 0, 1.0, 0.0)
data['positions'] = data['signal'].diff()
```
#### Step 4-6: Similar to the steps outlined above for backtesting and plotting results
By applying these steps, we can backtest and visualize the performance of a momentum trading strategy on the SGX.
## Calculations and Analysis
### Example 1: LSE Mean Reversion Strategy Performance
**CAGR (Compound Annual Growth Rate) Calculation:**
\[ \text{CAGR} = \left( \frac{\text{Ending Value}}{\text{Beginning Value}} \right)^{\frac{1}{n}} - 1 \]
Where \( n \) is the number of years.
```python
beginning_value = portfolio['total'].iloc[0]
ending_value = portfolio['total'].iloc[-1]
years = (data.index[-1] - data.index[0]).days / 365.25
CAGR = (ending_value / beginning_value) ** (1 / years) - 1
print(f"CAGR: {CAGR:.2%}")
```
### Example 2: SGX Momentum Strategy Performance
**Sharpe Ratio Calculation:**
\[ \text{Sharpe Ratio} = \frac{\text{Mean Portfolio Return} - \text{Risk-Free Rate}}{\text{Portfolio Standard Deviation}} \]
Assuming a risk-free rate of 2%.
```python
risk_free_rate = 0.02
mean_return = portfolio['returns'].mean()
std_return = portfolio['returns'].std()
sharpe_ratio = (mean_return - risk_free_rate) / std_return
print(f"Sharpe Ratio: {sharpe_ratio:.2f}")
## Case Study: BlackRock
### Overview
BlackRock, the world’s largest asset manager, leverages algorithmic trading to manage its extensive portfolio. The firm employs sophisticated algorithms to execute trades, manage risks, and optimize portfolio performance.
### Trading Strategies
BlackRock’s algo trading strategies include:
- **Index Arbitrage:** Exploiting price differences between index futures and underlying stocks.
- **Mean Reversion:** Identifying stocks that have deviated from their historical price patterns and betting on their return to the mean.
- **Momentum Trading:** Capitalizing on stocks that show strong trends in a particular direction.
### Technology Stack
BlackRock uses a proprietary trading platform called Aladdin, which integrates risk management, trading, and portfolio management. Aladdin employs advanced data analytics, machine learning, and cloud computing to support algo trading activities.
### Impact
BlackRock’s algorithmic trading has significantly enhanced its trading efficiency, reduced transaction costs, and improved overall portfolio performance. The firm’s ability to execute large volumes of trades with minimal market impact has been a critical factor in its success.
### Real-World Example: Index Arbitrage on LSE
#### Index Arbitrage Strategy:
Assume a scenario where BlackRock is using index arbitrage on the FTSE 100 index. If the index futures price is trading above its fair value compared to the underlying stocks, BlackRock would sell the futures and buy the underlying stocks.
### Calculations:
- **Fair Value of Futures**: \( \text{Futures Price} = \text{Spot Price} \times (1 + \text{Risk-Free Rate} - \text{Dividend Yield})^{T} \)
- **Spot Price**: Current price of the underlying index.
- **Risk-Free Rate**: Assume a risk-free rate of 2%.
- **Dividend Yield**: Assume a dividend yield of 3%.
- **Time to Maturity (T)**: Assume 0.5 years.
```python
spot_price = 7000 # Current spot price of FTSE 100
risk_free_rate = 0.02
dividend_yield = 0.03
T = 0.5
fair_value = spot_price * (1 + risk_free_rate - dividend_yield) ** T
print(f"Fair Value of Futures: {fair_value:.2f}")
```
### Impact:
If the actual futures price is significantly higher than the fair value, BlackRock can capitalize on this discrepancy by executing the arbitrage strategy.
## Case Study: Tower Research
### Overview
Tower Research Capital, a leading HFT firm, is renowned for its low-latency trading strategies. The firm employs cutting-edge technology and sophisticated algorithms to trade across various asset classes.
### Trading Strategies
Tower Research’s strategies include:
- **Statistical Arbitrage:** Using statistical models to identify and exploit price discrepancies between related financial instruments.
- **Market Making:** Providing liquidity by continuously quoting buy and sell prices and profiting from the bid-ask spread.
- **Event-Driven Trading:** Trading based on news events, earnings announcements, and economic data releases.
### Technology Stack
Tower Research invests heavily in low-latency infrastructure. The firm uses custom-built hardware, co-located servers, and high-speed communication networks to achieve ultra-fast trade execution.
### Impact
Tower Research’s focus on low latency has enabled it to gain a competitive edge in the market. The firm’s ability to execute trades within microseconds has resulted in consistent profitability and significant market share in the HFT space.
### Real-World Example: Statistical Arbitrage on SGX
#### Statistical Arbitrage Strategy:
Assume a scenario where Tower Research is using statistical arbitrage to trade pairs of stocks on the SGX. If stock A and stock B are typically correlated but have diverged, Tower Research can buy the underperforming stock and short the outperforming stock, expecting them to revert to their mean correlation.
### Calculations:
- **Z-Score Calculation**: \( Z = \frac{\text{Price Spread} - \mu}{\sigma} \)
- **Price Spread**: Difference between the prices of stock A and stock B.
- **Mean (\(\mu\)) and Standard Deviation (\(\sigma\)) of Price Spread**: Calculated based on historical data.
```python
spread = data['stock_A'] - data['stock_B']
mean_spread = spread.mean()
std_spread = spread.std()
z_score = (spread - mean_spread) / std_spread
data['z_score'] = z_score
```
### Trading Signals:
- **Buy Signal**: If Z-Score < -1.0 (Buy stock A and short stock B).
- **Sell Signal**: If Z-Score > 1.0 (Sell stock A and buy stock B).
```python
data['signal'] = 0.0
data['signal'][data['z_score'] < -1] = 1.0
data['signal'][data['z_score'] > 1] = -1.0
```
### Impact:
By implementing statistical arbitrage, Tower Research can profit from temporary deviations in the prices of correlated stocks.
## Conclusion
Algorithmic trading and quants have revolutionized the financial markets, enabling firms to execute trades with speed, precision, and efficiency. The cases of BlackRock and Tower Research highlight the diverse applications and impact of algo trading in the industry. Real-world examples from the LSE and SGX illustrate how these strategies can be applied and the calculations involved. As technology continues to evolve, the role of quants and the sophistication of algorithmic trading systems are expected to grow, further transforming the landscape of financial markets.
| nashetking |
1,914,110 | JavaScript MMORPG - Maiu Online - #babylonjs - Ep: 26 Abilities definitions and new targeting marks | Hello, This week I spent mostly on thinking about future gameplay. I did several tests and... | 0 | 2024-07-06T21:24:42 | https://dev.to/maiu/javascript-mmorpg-maiu-online-babylonjs-ep-26-abilities-definitions-and-new-targeting-marks-hc5 | babylonjs, indiegamedev, mmorpg, javascript | Hello,
This week I spent mostly on thinking about future gameplay. I did several tests and prototypes, I know much more then before and I gain some knowledge about limitations and problems which gameplay related stuff brings into the game.
From the stuff that is visible I managed to improve targeting marking. I added new target mark under the mesh and outline around it.
Recently I had some problems and most of the area of the meshes didn't triggered cursorOver/cursorPick events, it was occurring for random entities and i didn't manage to replicate it in the babylonjs playground. To not spend to much time on this problem which might be related to the mesh itself I fixed it with a hack. Each entity has assigned cylinder which is user for picking and it works quite good :)
I made first steps into abilities. Since now each class has 2 abilities, which are fetched from the server with all related data: icons, descriptions, animations names etc... Also there's tooltip with spell description - again i didn't manage to make tooltip showing next to the icon so i picked ad hoc solution and it's displayed in the middle of the screen.
The last thing which I added are tabs in the settings panel.
Last 3 days i spent on rewriting player controller system , adding key bindings and handling user inputs with some more structured way. I broke movement and combat and for now it's not working :p. I hope this version(4th or 5th one) which I'm working on will be final and soon I'll be able to continue working on the abilities.
{% youtube m3eoblgMTHg %} | maiu |
1,914,078 | Popular Interview Questions for Senior .NET ✅Developer | Preparing for a senior .NET developer interview involves covering a broad range of topics, including... | 0 | 2024-07-06T20:58:56 | https://dev.to/shahed1bd/popular-interview-questions-for-senior-net-developer-4cpe | Preparing for a senior .NET developer interview involves covering a broad range of topics, including advanced C# programming, .NET framework details, architecture and design patterns, cloud services integration, and more.
Here are some popular interview questions for senior .NET developers:
#1 C# Fundamentals:
- Explain the differences between ref and out parameters.
- What are delegates and events? Provide an example of each.
- Discuss the various access modifiers (public, private, protected, internal) and their scope.
#2 Object-Oriented Programming (OOP):
- What is polymorphism? How is it achieved in C#?
- Describe the SOLID principles. How do they apply to C# development?
- Explain the differences between abstract classes and interfaces. When would you use one over the other?
#3 ASP.NET and Web Development:
- What are the different session state management options in ASP.NET?
- Explain the role of MVC (Model-View-Controller) architecture in ASP.NET applications.
- How does Web API differ from MVC? When would you choose one over the other?
#4 Database and Entity Framework:
- What is Entity Framework, and how does it work with databases?
- Discuss the advantages of using LINQ over traditional SQL queries.
- How do you handle concurrency and transactions in Entity Framework?
#5 Testing and Debugging:
- What testing frameworks have you used with .NET applications?
- How would you debug a performance issue in a .NET application?
- What is unit testing, and why is it important in software development?
#6 Advanced Topics:
- Explain dependency injection and its benefits. How is it implemented in .NET?
- Discuss asynchronous programming in C#. When would you use async and await?
- What are the different types of design patterns you’ve implemented in .NET projects?
#7 Cloud and Microservices:
- Have you integrated .NET applications with cloud services like Azure? Describe your experience.
- What are microservices? How would you design a .NET application using microservices architecture?
#8 General Development Practices:
- How do you handle version control in .NET projects?
- Describe your approach to code reviews and maintaining code quality.
- How do you stay updated with the latest .NET technologies and best practices?
Preparing for these questions involves not only understanding the concepts but also being able to articulate your experiences and problem-solving skills effectively. Tailor your answers to reflect your practical experience and how you’ve applied these concepts in real-world scenarios.
[👋 .NET Application Collections](https://1.envato.market/7mA73y)
[🚀 My Youtube Channel](https://www.youtube.com/@DotNetTech)
[💻 Github](https://github.com/shahedbd) | shahed1bd |
|
1,914,077 | TradingView / Coinglass | Hello everyone and thank you for your help. I would like to add this function to my indicator on... | 0 | 2024-07-06T20:52:00 | https://dev.to/bob_a_c19e0eb7e484454d406/tradingview-coinglass-4epd | Hello everyone and thank you for your help.
I would like to add this function to my indicator on TradingView:
https://www.coinglass.com/pro/futures/LiquidationHeatMap
Is there an equivalence that exists on TradingView
How to do it?
Thank you for your valuable help. | bob_a_c19e0eb7e484454d406 |
|
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|
1,914,075 | king's clean. | cleaning service landing page For this, I used CSS Grid and Flex. They allow me to focus more on the... | 0 | 2024-07-06T20:42:50 | https://dev.to/mutalibb/kings-clean-5781 | **cleaning service landing page**
For this, I used CSS Grid and Flex. They allow me to focus more on the design and worry less about different screen sizes. CSS Grid and Flex are perfect for creating responsive layouts; they fit and display beautifully on all kinds of screens without requiring media queries. This is a cleaning company landing page—a demo I designed to showcase how a simple page can include all the necessary details without the need for navigation between pages.
| mutalibb |
|
1,914,074 | A Comprehensive Analysis of the Educational Landscape of Diploma Programs in Web Design | In Today's age, web designing is a crucial skill as the demand for attractive and functional websites... | 0 | 2024-07-06T20:39:16 | https://dev.to/wisdom_collegecreativity/a-comprehensive-analysis-of-the-educational-landscape-of-diploma-programs-in-web-design-186h | webdesign, webdesigning | In Today's age, web designing is a crucial skill as the demand for attractive and functional websites continues to grow. A [diploma in web design](https://wisdomdesigncollege.in/diploma-in-Web-design-development) offers a practical approach to gaining the necessary skills required to succeed in the dynamic field of website design.
This article provides an analysis of the educational landscape of diploma offers in web design, stating course structure, skills required, career opportunities, and future designs in web design. Let’s start with a basic understanding of web design and the concepts students need to master in web design.
## What is a Diploma in Web Design?
A diploma in web design is a specialized educational program that equips students with the skills and knowledge needed to design and develop efficient websites. This program covers various aspects of website designing such as graphic design, user interface (UI) design, coding and user experience (UX). Diplomas are often shorter than degrees making it more convenient for students to learn these specific skills in web design.
### Curriculum of a Web Design Course
A diploma course in web design usually ranges from six to 2 years and covers both the basic and advanced topics in web design and development. Key areas of study in web designing often include:
**HTML and CSS:** Fundamentals of web development, teaching students how to structure and style web pages.
**JavaScript:** Essential for creating interactive web elements.
**Responsive Design:** Techniques used to create websites across different devices and screen sizes.
**UX/UI Design:** Principles of designing user-friendly and visually appealing interfaces.
**Graphic Design Software:** Learning tools like Adobe Photoshop and Illustrator for creating web graphics.
**Web Development Tools:** Familiarity with tools like WordPress, Sketch and Adobe Creative Suite.
## Why Pursue a Diploma in Web Designing?
The skills and exposure that students get after completing a diploma in web design is something that makes it worth every penny, but there are other benefits also, such as:
1. The value of a diploma or degree in the ever-evolving field of web designing is manifold.
2. The technical proficiency gained in various coding languages like HTML, CSS and JavaScript is essential.
3. Web design also requires students to find errors in website design and then fix all the flaws which requires attention to detail, other skills like problem-solving and critical thinking skills can also be learned in a diploma in web design.
4. The practical learning experience, guest lectures from web designing experts and internship opportunities provided in a diploma in web design make student's portfolios stronger and get them better packages.
## What are the Career Opportunities with a Web Design Diploma?
Graduates with a diploma in web design have a variety of career paths available to them, such as:
- **Web Designer:** Web designers create the visual aspects of the websites, ensuring they are user-friendly and appealing to them. They work with clients to understand which type of website they want, the visuals, theme, etc.
- **Front-End Developer:** Front-end developers focus on the user side of the website and make it easier to navigate, search and interact with. They use HTML, JavaScript and CSS to build interactive and responsive web pages.
- **UI/UX Designer:** UI or UX designers specialize in creating instinctive and engaging user interfaces to improve user experience. They conduct usability tests and user research to create stunning designs.
- **E-Commerce Specialist:** E-commerce specialists design and create online stores, optimizing them for sales and improving user experience. They often work on platforms like Magento and Shopify.
## What are the Future Trends in Web Designing?
The field of web designing is always expanding because of advancements in technology and changing user expectations. Numerous future trends are covered in a Diploma in web design, such as:
**1. Emphasis on Mobile-Friendly Design:** Prioritizing mobile-friendly designs as mobile users continue to grow.
**2. Use of AI and Machine Learning:** AI is making waves in every industry and web design is no exception, there is an increasing use of AI to enhance user experience and make customized websites according to different users.
**3. Focus on Accessibility:** Ensuring the website is accessible to all users, including those with disabilities.
## Conclusion
A diploma in web design offers a focused and practical education to learners dedicated to website designing and development. It offers a comprehensive understanding of website development, design principles and the latest tools needed to succeed in today’s digital landscape. As demand for skilled web designers and developers continues to grow, a diploma in web design & development remains a valuable asset for aspiring professionals. | wisdom_collegecreativity |
1,914,073 | Telegram weather bot | Hello, friends! I want to share my project with you. This is a Telegram bot that gets weather... | 0 | 2024-07-06T20:38:08 | https://dev.to/kyoresuas/telegram-weather-bot-5bcl | javascript, programming, tutorial, telegram | Hello, friends! I want to share my project with you. This is a Telegram bot that gets weather information using the OpenWeatherMap API. But more importantly, it has a scalable and modular architecture. I would appreciate it if you would check out my repository and star it if you find it useful, and maybe even follow me (if you feel like it). Feel free to leave a comment about what you think about the project - I'd love to hear your feedback! GitHub repository link: https://github.com/kyoresuas/telegram-weather-bot | kyoresuas |
1,914,067 | Dataverse Web Resources with React, Typescript and FluentUI (_neronotte's way) | In a world that moves towards Custom Pages and PCFs, there are still scenarios in which a old,... | 0 | 2024-07-06T20:36:27 | https://dev.to/_neronotte/dataverse-web-resources-with-react-typescript-and-fluentui-neronottes-way-3n40 | powerplatform, webresources, react, typescript | In a world that moves towards _Custom Pages_ and _PCFs_, there are still scenarios in which a old, simple, custom _WebResource_ is the best choice.
[Diana Birkelbach wrote a really interesting post about this topic](https://dianabirkelbach.wordpress.com/2021/09/29/goodbye-html-web-resources/) describing pros and cons of both, and also describing how to mix them together to enrich the user experience.
It's 2024, and the best way to create custom WebResources for Dataverse is to leverage React, Typescript and FluentUI, for many reasons:
- Continuity with Dataverse internal UI engine
- Continuity with PCF development
- UI automatically styled like Dataverse
- Automatic support for themes
- Strongly-typing & compile time errors
... and many more.
There are a lot of interesting articles and videos online on how to create _WebResources_ leveraging those techs, and I don't like to repeat stuff that's already available (I'm lazy, you know it), thus you will find a few references at the end of this article. Today I'm gonna show you how I like to work on this stuff.
## Let's start
### Prerequisites
To work with react + Typescript + FluentUI, be sure to have the latest version of **Node.js** and **NPM** installed on your local machine. [This doc shows you how to setup both](https://docs.npmjs.com/downloading-and-installing-node-js-and-npm).
### Initial folder setup
First of all, I like to start setting up the folder that will contain all my WebResources (images, html pages, javascripts, and so on). For the sake of this tutorial I will store everything under `c:\sources\test\WebResourcesMyWay`. [I like to do it via PACX](https://github.com/neronotte/Greg.Xrm.Command/wiki/pacx-webresources-init):
```Powershell
pacx webresources init
```
It initializes my WebResources folder with the following structure:
The folder names are self explanatory. They will reflect how WRs will be named within my Dataverse environment.
## A custom home page
Assume we would like to create a Dataverse WebResource that acts as home page for users accessing one of our model driven apps.
Let's setup our React + Typescript + FluentUI project. On the root folder, let's type:
```Powershell
npx create-react-app home --template @_neronotte/cra-template-dataverse-webresource
```
This command will create our WebResource project folder called `home` with the following structure:
It generates a React+Typescript App project with:
- [sass](https://sass-lang.com/) to handle CSS on steroids.
- [@types/xrm](https://www.npmjs.com/package/@types/xrm) to manage Dataverse client API using strongly typed classes.
- [ClientGlobalContext.js.aspx](https://learn.microsoft.com/en-us/power-apps/developer/model-driven-apps/clientapi/reference/getglobalcontext-clientglobalcontext.js.aspx) automatically referenced in the `index.html` page (you can remove it manually if your web resource needs to be opened within a form).
- Webpack already configured to generate a single JS file without chunks.
- A ready-to-use local stub for Dataverse client API that can be used to test the WebResource locally, simulating server calls (under the `src/sdk` folder).
There are a few manual operations to complete before starting, that are described in the generated `README.md` file.
I need to:
1. Change the value of the **title** tag of the `./public/index.html` page to provide a meaningful title for the webresource.
2. in the `config-overrides.js` file, replace `<output path>` with `../ava_/pages/home` (where I want my WebResource to be saved).
3. in the `package.json` file, replace `<output path>` with `../ava_/pages/home`.
4. If needed, in the same `./public/index.html` page change the relative url of `ClientGlobalContext.js.aspx` page to match our project structure. In my case, the compiled React app will be placed into `ava_/pages/home` folder, thus the default `ClientGlobalContext.js.aspx` path works fine.
Once done, everything's ready for our WR to be compiled and run. Just type:
```Powershell
cd home
npm run build
```
And you'll see that the current content of the WR is compiled and placed in the `ava_/pages/home` folder.
Now, if you type:
```Powershell
npm run start
```
The WR starts in a new browser window.
You can now change the contents of the WR starting from `App.tsx`, and **Node** will recompile on the fly and reflect the changes in the browser window.
You are now ready to go, happy pro-code development!
## References
- [@_neronotte/cra-template-dataverse-webresource](https://www.npmjs.com/package/@_neronotte/cra-template-dataverse-webresource)
- [The LinkedIn post that shows a first use of @_neronotte/cra-template-dataverse-webresource](https://www.linkedin.com/posts/riccardogregori_dynamics365-react-typescript-activity-7117118675152756737-pfNY?utm_source=share&utm_medium=member_desktop)
- [This is a tutorial on React App Rewired](https://egghead.io/lessons/react-customize-create-react-app-cra-without-ejecting-using-react-app-rewired), that seems to be the easiest way to generate build that can "work" in a Dataverse environment.
- [Tutorial on how to create custom webresources from scratch](https://butenko.pro/2020/04/22/development-of-custom-html-js-webresources-with-help-of-modern-frameworks/) it shows how to properly modify webpack.config.js | _neronotte |
1,909,887 | NoSQL | When to use a NoSQL Database Need to be able to store different data type formats: NoSQL... | 0 | 2024-07-03T08:26:55 | https://dev.to/congnguyen/nosql-4cef | ##**When to use a NoSQL Database**
- **Need to be able to store different data type formats:** NoSQL was also created to handle different data configurations: structured, semi-structured, and unstructured data. JSON, XML documents can all be handled easily with NoSQL.
- **Large amounts of data:** Relational Databases are not distributed databases and because of this they can only scale vertically by adding more storage in the machine itself. NoSQL databases were created to be able to be horizontally scalable. The more servers/systems you add to the database the more data that can be hosted with high availability and low latency (fast reads and writes).
- **Need horizontal scalability:** Horizontal scalability is the ability to add more machines or nodes to a system to increase performance and space for data
- **Need high throughput:** While ACID transactions bring benefits they also slow down the process of reading and writing data. If you need very fast reads and writes using a relational database may not suit your needs.
- **Need a flexible schema:** Flexible schema can allow for columns to be added that do not have to be used by every row, saving disk space.
- **Need high availability:** Relational databases have a single point of failure. When that database goes down, a failover to a backup system must happen and takes time.
##**When NOT to use a NoSQL Database?**
- **When you have a small dataset:** NoSQL databases were made for big datasets not small datasets and while it works it wasn’t created for that.
- **When you need ACID Transactions:** If you need a consistent database with ACID transactions, then most NoSQL databases will not be able to serve this need. NoSQL database are eventually consistent and do not provide ACID transactions. However, there are exceptions to it. Some non-relational databases like MongoDB can support ACID transactions.
- **When you need the ability to do JOINS across tables:** NoSQL does not allow the ability to do JOINS. This is not allowed as this will result in full table scans.
- **If you want to be able to do aggregations and analytics**
- **If you have changing business requirements :** Ad-hoc queries are possible but difficult as the data model was done to fix particular queries
- **If your queries are not available and you need the flexibility :** You need your queries in advance. If those are not available or you will need to be able to have flexibility on how you query your data you might need to stick with a relational database | congnguyen |
|
1,867,061 | Run Flyway DB migrations with AWS Lambda and RDS - Part 1 | Usually there is a need to run SQL database updates: update table columns, add new rows, create a new... | 27,542 | 2024-07-06T20:32:14 | https://dev.to/aws-builders/run-flyway-db-migrations-with-aws-lambda-and-rds-part-1-2a6j | devops, aws, java, database | Usually there is a need to run SQL database updates: update table columns, add new rows, create a new schema etc. Often developer teams are using [Flyway](https://flywaydb.org/) It is an open-source database SQL deployment tool. In Flyway, all DDL and DML changes to the database are called migrations. Migrations can be versioned or repeatable.
If RDS cluster is in private subnet how then you are going to automate these DB migrations?
One of the solutions is to use AWS Lambda in the same VPC that will have flyway run against DB
Here is what we are going to do:
Part 1 - Create local setup
1. Initialize project
2. Docker image for PostgreSQL and Flyway so we can test our code
3. Write Java class that will run Flyway Migrations in our docker container
Part 2 - Deploy in AWS
4. Create AWS Lambda using Terraform
5. Update Java class and deploy code in Lambda
6. Configure access from Lambda to RDS (no DB password is needed)
7. Make some conclusions
---
**Initialize project**
- create new java project using gradle init
- you src folder should like this (Example https://github.com/nbekenov/flyway-lambda/tree/local-setup)
```
└── src
├── main
├── java
│ └── com
│ └── example
│ └── DatabaseMigrationHandler.java
└── resources
└── db
└── migration
└── V1__Create_table.sql
```
- our SQL migration scripts will be stored in src/resources/db/migration folder
- our main java class will be in DatabaseMigrationHandler.java (you can name you package the way you want - I named it com.example)
---
**Docker Compose Setup for Local Development**
In this setup, we are using Docker Compose to create a local environment for testing database migrations using Flyway and PostgreSQL. If you want you can skip explanation and get to [git repo with the code](https://github.com/nbekenov/flyway-lambda/tree/local-setup)
```
/docker
├── .env.pg_admin
├── README.md
├── docker-compose.yml
└── init
└── create_schemas.sql
```
- Create docker folder.
- Create init folder inside docker folder
In init folder create new file create_schemas.sql. This file will be used for initialization and creating our DB schema.
```
CREATE SCHEMA IF NOT EXISTS myschema;
```
- Create new file .env.pg_admin inside docker folder - this file contains values for env variables for one of the docker containers
```
[email protected]
PGADMIN_DEFAULT_PASSWORD=mysecretpassword
```
- And finally create docker-compose.yml inside docker folder
```
version: '3.1'
services:
db:
image: postgres
restart: always
environment:
POSTGRES_USER: postgres
POSTGRES_PASSWORD: mysecretpassword
volumes:
- ./local-data:/var/lib/postgresql/data
- ./init:/docker-entrypoint-initdb.d # init scripts are executed upon DB container startup
ports:
- 5432:5432
flyway:
image: flyway/flyway
depends_on:
- db
volumes:
- ../src/main/resources/db/migration:/flyway/sql
command: -url=jdbc:postgresql://db:5432/postgres -schemas=myschema -user=postgres -password=mysecretpassword -connectRetries=60 migrate
pg_admin:
image: dpage/pgadmin4
depends_on:
- db
env_file:
- .env.pg_admin
ports:
- 80:80
volumes:
local-data:
external: false
```
We define three services: db, flyway, and pg_admin.
_Database Service (db)_
- Environment Variables: Sets the PostgreSQL user and password.
- Volumes:
- ./local-data:/var/lib/postgresql/data: Maps a local directory to the PostgreSQL data directory to persist data.
- ./init:/docker-entrypoint-initdb.d: Maps a local directory to the directory where PostgreSQL looks for initialization scripts.
_Flyway Service (flyway)_
- Depends_on: Ensures that the db service starts before the Flyway service.
- Volumes: Maps the local directory containing SQL migration scripts to Flyway's expected location.
- Command: Provides Flyway with the necessary parameters to connect to the database and run the migrations:
```
-url=jdbc:postgresql://db:5432/postgres: JDBC URL to connect to the PostgreSQL database.
-schemas=myschema: Specifies the schema to migrate.
-user=postgres and -password=mysecretpassword: Database credentials.
-connectRetries=60: Retries the connection for up to 60 seconds if the database is not immediately available.
migrate: Command to run the migrations.
```
_pgAdmin Service (pg_admin)_
- Depends_on: Ensures the db service starts before pgAdmin.
- Env_file: Loads environment variables from a .env.pg_admin file to configure pgAdmin.
- Ports: Maps port 80 on the host to port 80 in the container to access pgAdmin through a web browser.
Start containers
```
cd docker
docker-compose up -d
```
Verify that Flyway run
```
docker ps -a
docker logs <container-id-or-name> --tail 20
```
---
**Write Java class**
In this section, we'll dive into the Java class DatabaseMigrationHandler that is designed to run Flyway migrations against a local PostgreSQL database set up in a Docker container. This class encapsulates all the necessary logic to establish a database connection, test the connection, and execute the migrations.
If you want you can skip explanation and get to [git repo with the code](https://github.com/nbekenov/flyway-lambda/blob/local-setup/src/main/java/com/example/DatabaseMigrationHandler.java)
- Package and Imports
```
package com.example;
import org.flywaydb.core.Flyway;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;
import java.util.Objects;
import software.amazon.jdbc.PropertyDefinition;
import software.amazon.jdbc.ds.AwsWrapperDataSource;
```
Package Declaration: The class is part of the com.example package.
Imports: Necessary classes from the Flyway library, Java SQL package, and AWS JDBC wrapper for handling database connections are imported
- Class and Instance Variables
```
public class DatabaseMigrationHandler {
// instance vars
private final String dbHost;
private final String dbPort;
private final String dbName;
private final String dbSchema;
private final String dbUser;
private final String dbPassword;
private static final String DB_HOST = "localhost";
private static final String DB_PORT = "5432";
private static final String DB_NAME = "postgres";
private static final String DB_SCHEMA = "myschema";
private static final String DB_USER = "postgres";
private static final String DB_PASSWORD = "mysecretpassword";
}
```
Instance Variables: These store the database connection details such as host, port, name, schema, user, and password.
Static Constants: Default values for the database connection details are defined as static constants.
- Constructor
```
public DatabaseMigrationHandler() {
this.dbHost = DB_HOST;
this.dbPort = DB_PORT;
this.dbName = DB_NAME;
this.dbSchema = DB_SCHEMA;
this.dbUser = DB_USER;
this.dbPassword = DB_PASSWORD;
}
```
Constructor: Initializes the instance variables with the default values defined above.
- Test Connection Method
```
private boolean testConnection() {
try (Connection connection = getDataSource().getConnection()) {
return connection != null;
} catch (SQLException e) {
e.printStackTrace();
return false;
}
}
```
testConnection Method: Attempts to establish a connection to the database. Returns true if successful, otherwise logs the exception and returns false.
- Run Migrations Method
```
private void runMigrations() {
try{
Flyway flyway = Flyway.configure()
.dataSource(getDataSource())
.schemas(this.dbSchema. )
.load();
flyway.migrate();
System.out.println("Completed Database migration!");
} catch (Exception e) {
System.out.println("Database migration failed!");
e.printStackTrace();
}
}
```
runMigrations Method: Configures and runs Flyway migrations. It uses the Flyway class to set up the data source and schema, then initiates the migration process.
- Data Source Configuration
```
private AwsWrapperDataSource getDataSource() {
Properties targetDataSourceProps = new Properties();
targetDataSourceProps.setProperty("ssl", "false");
targetDataSourceProps.setProperty("password", this.dbPassword);
AwsWrapperDataSource ds = new AwsWrapperDataSource();
ds.setJdbcProtocol("jdbc:postgresql:");
ds.setTargetDataSourceClassName("org.postgresql.ds.PGSimpleDataSource");
ds.setServerName(this.dbHost);
ds.setDatabase(this.dbName);
ds.setServerPort(this.dbPort);
ds.setUser(this.dbUser);
ds.setTargetDataSourceProperties(targetDataSourceProps);
return ds;
}
}
```
getDataSource Method: Configures the data source using [AwsWrapperDataSource](https://github.com/aws/aws-advanced-jdbc-wrapper/blob/main/docs/using-the-jdbc-driver/DataSource.md) to connect to the PostgreSQL database. It sets the necessary properties such as server name, database name, port, user, and password.
- Main method
```
public static void main(String[] args) {
DatabaseMigrationHandler handler = new DatabaseMigrationHandler();
if (handler.testConnection()) {
System.out.println("Database connection successful!");
handler.runMigrations();
} else {
System.out.println("Failed to connect to the database.");
}
}
```
main Method: The entry point of the application. It creates an instance of DatabaseMigrationHandler, tests the database connection, and runs the migrations if the connection is successful.
---
**Explanation of the build.gradle**
In this section, we'll go through the build.gradle file, which is used to configure the build process for your Java project. We'll also cover some useful Gradle commands for building and running your project.
- Plugins Section
```
plugins {
id 'java'
id 'groovy'
id 'application'
}
```
application Plugin: Facilitates the creation of Java applications and provides tasks for running the application
- Dependencies Section
```
dependencies {
implementation 'org.flywaydb:flyway-core:9.22.3'
implementation 'org.postgresql:postgresql:42.7.2'
implementation 'software.amazon.jdbc:aws-advanced-jdbc-wrapper:2.3.0'
testImplementation platform('org.junit:junit-bom:5.10.0')
testImplementation 'org.junit.jupiter:junit-jupiter'
}
```
implementation: Declares dependencies required to compile and run the application. Here, flyway-core, postgresql, and aws-advanced-jdbc-wrapper are included.
- Application Section
```
application {
mainClass = 'com.example.DatabaseMigrationHandler'
}
```
mainClass: Specifies the main class of the application, which is com.example.DatabaseMigrationHandler. This is the entry point when running the application.
---
Once you have your build.gradle file set up, you can use several Gradle commands to manage your project. These commands are executed from the command line.
```
./gradlew clean
```
clean: Deletes the build directory, effectively cleaning the project. This is useful for ensuring a fresh build environment.
```
./gradlew build
```
build: Compiles the source code, runs tests, and packages the project into a JAR file. This command performs all the necessary steps to create a build artifact.
```
./gradlew run
```
run: Executes the main class specified in the application section. In this case, it will run com.example.DatabaseMigrationHandler, which handles the Flyway migrations.
In the logs you should see that connection to DB was established and DB migrations run successfully.
| nbekenov |
1,914,072 | How to Create a Virtual Machine Scale Set in Azure | Creating a Virtual Machine Scale Set (VMSS) in Azure allows you to manage and automatically scale a... | 0 | 2024-07-06T20:31:19 | https://dev.to/florence_8042063da11e29d1/how-to-create-a-virtual-machine-scale-set-in-azure-5agg | virtualmachinescaleset, vmss, azure, virtualmachine | Creating a Virtual Machine Scale Set (VMSS) in Azure allows you to manage and automatically scale a group of virtual machines.
Here's a step-by-step guide to create a VMSS using the Azure portal:
###Step 1: Sign in to Azure Portal###
Open your web browser and go to the Azure portal.
Sign in with your Azure account credentials.
###Step 2: Navigate to Virtual Machine Scale Sets###
In the Azure portal, click on the **"Create a resourc"** button (+) in the left-hand menu.
In the **"Search the Marketplace"** box, type **"Virtual Machine Scale Sets"** and select it from the list.
Click "Create" to start the creation process.
Step 3: Configure Basic Settings
Subscription: Select your Azure subscription.
Resource Group: Select an existing resource group or create a new one.
Name: Enter a name for your scale set.
Region: Choose the region where you want to deploy the VMSS.
Availability Zone: (Optional) Select an availability zone if required.
Orchestration mode: Choose Uniform (recommended for most scenarios) or Flexible.
Step 4: Configure Instance Details
Image: Select an operating system image for your VMs (e.g., Ubuntu Server 20.04 LTS).
Size: Choose a VM size (e.g., Standard DS1 v2).
Step 5: Configure Scaling Settings
Instance Count: Set the initial number of instances (e.g., 2).
Scaling Policy: Configure the scaling policy to automatically increase or decrease the number of instances based on CPU usage, memory, or custom metrics.
Step 6: Configure Networking
Virtual Network: Select an existing virtual network or create a new one.
Subnet: Select a subnet within the chosen virtual network.
Public IP Address: Choose whether to associate a public IP address with the VMs.
Load Balancer: (Optional) Select a load balancer to distribute traffic across the VMs.
Step 7: Configure Management Settings
Diagnostics: Enable boot diagnostics and choose a storage account for storing diagnostic logs.
Identity: (Optional) Assign a managed identity for your VMSS to access other Azure resources securely.
Auto-shutdown: Configure auto-shutdown settings if needed.
Step 8: Review and Create
Review all the settings you have configured.
Click "Review + create" to validate the configuration.
Once validation passes, click "Create" to deploy the VMSS.
Step 9: Monitor and Manage the VMSS
After deployment, navigate to the "Virtual Machine Scale Sets" service in the Azure portal.
Select your newly created VMSS to view its details.
Use the "Instances" tab to monitor the status of individual VM instances.
Use the "Scaling" tab to adjust scaling policies and settings.
Step 10: Connect to a VM Instance
In the VMSS overview, click on "Instances".
Select an instance and click "Connect".
Follow the instructions to connect to the VM instance using SSH (for Linux) or RDP (for Windows).
Conclusion
By following these steps, you can create a Virtual Machine Scale Set in Azure, which allows you to automatically scale your application based on demand, ensuring high availability and performance.
| florence_8042063da11e29d1 |
1,914,071 | Smoke and Fire Detection integrated with LoRA Module | Breathe easy with my smoke detection project! Using the power of Python, I’ve created a vigilant... | 0 | 2024-07-06T20:25:49 | https://dev.to/swhaadi/smoke-and-fire-detection-integrated-with-lora-module-3il2 | webdev, developers, python, ai | Breathe easy with my smoke detection project! Using the power of Python, I’ve created a vigilant sentinel that spots smoke faster than a campfire storyteller. Whether it’s a smoldering toast or a sneaky cigarette, this code has your back, keeping your space safe and sound. | swhaadi |
1,914,070 | HMI for Cheese Manufacturing Factory | Say cheese to the future of dairy! I've created an HMI project that transforms your cheese... | 0 | 2024-07-06T20:23:14 | https://dev.to/swhaadi/hmi-for-cheese-manufacturing-factory-46db | webdev, python, ai, developers | Say cheese to the future of dairy! I've created an HMI project that transforms your cheese manufacturing factory into a smooth operation. With just a swipe and a tap, you can control the curds and whey like a maestro, making sure every wheel of cheese is perfect. From milk to mozzarella, I’ve made cheese-making a breeze! | swhaadi |
1,914,047 | The AI That Knows Everything (Except What You Need) | Imagine this: You've created an AI that can discuss quantum physics, write poetry, and crack jokes.... | 0 | 2024-07-06T19:21:35 | https://dev.to/samadpls/the-ai-that-knows-everything-except-what-you-need-5cpe | rag, llm, ai, machinelearning | Imagine this: You've created an AI that can discuss quantum physics, write poetry, and crack jokes. But when asked about your company's latest product, it draws a blank. Frustrating, right? Welcome to the cutting edge of AI development, where even the smartest machines need a helping hand. Whether you're a seasoned pro or a curious newcomer, this guide will help you navigate the AI landscape and choose between the game-changing approaches of RAG and fine-tuning.
### RAG: Teaching Old AI New Tricks Without Surgery
Retrieval-Augmented Generation (RAG) is a system for creating generative AI applications. It uses enterprise data sources and vector databases to address the knowledge limitations of LLMs. RAG works by using a retriever module to search for relevant information from an external data store based on a user's prompt. The information retrieved is then used as context, combined with the original prompt to create an expanded prompt, which is passed to the language model. The language model then generates a response that includes the enterprise knowledge.
RAG allows language models to use current, real-world information. It deals with the challenge of frequent data changes by retrieving current and relevant information instead of relying on potentially outdated data sets.
Here’s a simple architecture diagram to explain RAG:
### Fine-Tuning: When AI Goes Back to School
While RAG is beneficial for enterprise applications, it does have some limitations. The retrieval process is confined to the datasets stored in the vector at the time of retrieval, and the model itself remains static. The retrieval process can also introduce latency, which may be problematic for certain use cases. Additionally, the retrieval is based on pattern matching rather than a complex understanding of the context.
Model fine-tuning provides a way to permanently change the underlying foundation model. Through fine-tuning, the model can learn specific enterprise terminology, proprietary datasets, and terminologies. Unlike RAG, which temporarily enhances the model with context, fine-tuning modifies the model itself.
There are two main categories of fine-tuning:
#### Prompt-Based Learning
Prompt-based learning involves fine-tuning the foundation model for a specific task using a labelled dataset of examples formatted as prompt-response pairs. This process is usually lightweight and involves a few training epochs to adjust the model’s weights. However, this type of fine-tuning is specific to one task and cannot be generalized across multiple tasks.
#### Example
| Prompt | Response |
|------------------------------------------------|---------------------------------------------------|
| "Translate the following English sentence to French: 'Hello, how are you?'" | "Bonjour, comment ça va ?" |
| "Summarize the following text: 'AI is transforming the tech industry by automating tasks and providing insights.'" | "AI automates tasks and provides insights, transforming the tech industry." |
| "What is the capital of France?" | "The capital of France is Paris." |
| "Generate a formal email requesting a meeting."| "Dear [Name], I hope this message finds you well. I would like to request a meeting to discuss [subject]. Please let me know your availability. Best regards, [Your Name]" |
#### Domain Adaptation
Domain adaptation enables you to adjust pre-trained foundational models to work for multiple tasks using limited domain-specific data. By exposing the model to unlabeled datasets, you can update its weights to understand the specific language used in your industry, including jargon and technical terms. This process can work with varying amounts of data for fine-tuning.
To carry out fine-tuning, you'll need a machine learning environment that can manage the entire process, as well as access to appropriate compute instances.
#### Example
| Text |
|-------------------------------------------------|
| "The Q3 financial report indicates a 15% increase in revenue." |
| "Our proprietary software, InnoTech, streamlines workflow processes and improves efficiency." |
| "Technical specifications for the new product include a 2.4 GHz processor, 8 GB RAM, and a 256 GB SSD." |
| "Market analysis shows a growing trend in sustainable energy solutions." |
| "The user manual for the AlphaX device includes troubleshooting steps and FAQs." |
### Comparing RAG and Fine-Tuning
Both RAG and fine-tuning are effective for customizing a foundation model for enterprise use cases. The choice between them depends on various factors such as complexity, cost, and specific requirements of the task at hand.
- **RAG**: Best for applications requiring up-to-date information from dynamic data sources. It's suitable when you need to temporarily enhance the model with context from relevant documents.
- **Fine-Tuning**: Ideal for tasks requiring a deeper, more permanent integration of domain-specific knowledge into the model. It's suitable for applications where the model needs to understand and generate responses based on enterprise-specific language and terminologies.
As we've seen, RAG and fine-tuning each offer unique advantages in customizing LLMs. By understanding these approaches, you can create AI applications that are not just powerful, but truly relevant to your specific needs. The choice between them—or even combining both—can significantly impact your AI's effectiveness.
I'm Abdul Samad, aka `samadpls`. Passionate about AI? Let's connect on GitHub at [samadpls](https://github.com/samadpls) and push the boundaries of what's possible in AI development! | samadpls |
1,914,068 | Weapon Detection and Tracking | Transform your computer into a crime-fighting sidekick with my weapon detection project! From knives... | 0 | 2024-07-06T20:20:03 | https://dev.to/swhaadi/weapon-detection-and-tracking-3g8h | python, developers, webdev, ai | Transform your computer into a crime-fighting sidekick with my weapon detection project! From knives to bazookas, this Python-powered guardian spots threats faster than you can say "Abracadabra!" | swhaadi |
1,913,232 | Take your Resume Online with Azure CLI: A Beginner's Guide | Get Started: Before diving in, download the Azure CLI for your machine (Windows, Mac, or Linux)... | 0 | 2024-07-06T20:17:58 | https://dev.to/jimiog/take-your-resume-online-with-azure-cli-a-beginners-guide-ol4 | azure, webdev, microsoft, cloud | **Get Started:**
Before diving in, download the Azure CLI for your machine (Windows, Mac, or Linux) following the official guide: [link to Azure CLI download instructions](https://learn.microsoft.com/en-us/cli/azure/install-azure-cli-windows). Think of it as a mini-Azure control center to manage your online resume!
This streamlined guide will show you how to set up an Azure App Service using the Azure CLI, giving your resume a professional online presence.
**Logging In:**
1. **Sign in to Azure:** Open your terminal and type:
```bash
az login
```
Follow the on-screen instructions to log in to your Azure account using the Azure portal.
**Building Your Foundation:**
2. **Resource Group:** Imagine a folder for all your Azure resources. That's a resource group! Create one using this command, replacing `[name]` with your desired group name and `[location]` with a nearby Azure region:
```bash
az group create --name [name] --location [location]
```
3. **App Service Plan:** This defines the computing resources for your resume. Create a plan using:
```bash
az appservice plan create --name [name] --resource-group [resource_group_name] --sku FREE # Choose a pricing tier (FREE for this example)
```
**Deploying Your Resume:**
4. **Create Web App:** Now, create a web app to hold your resume:
```bash
az webapp create --name [name] --resource-group [resource_group_name] --plan [app_service_plan_name]
```
**Uploading Your Resume:**
1. **Access Web App:** Head over to the Azure portal and find your new web app. In the blade, seek out the "Development Tools" and click "Go" under "Advanced Tools."
2. **Open Command Prompt:** Open the "Debug console" and choose "CMD" from the top navigation bar.
3. **Navigate to wwwroot:** Click the "site" directory in the list of directories, then click on "wwwroot".
4. **Edit hostingstart.html:** While you can upload any file here, this example assumes an HTML resume. You can edit the existing `hostingstart.html`.
**See Your Resume Online:**
1. **Find your Web App URL:** In the Azure portal, locate your web app's overview and look for the "URL" field. This is the public address where your resume will be accessible.
**Cleaning Up (Optional):**
Remember, Azure resources cost money while they're running. To avoid unwanted charges, navigate to the resource group you created and delete it using the Azure portal or the following command:
```bash
az group delete --name [resource_group_name]
```
**Bonus Tips:**
* **Customize Your Resume:** This guide focuses on deployment. Feel free to personalize your HTML resume with CSS styling and additional information.
* **Consider a Custom Domain:** For a professional touch, you can purchase a custom domain name and map it to your Azure web app.
* **Explore Azure Static Web Apps:** Azure offers a simpler option called Static Web Apps specifically designed for hosting static content like resumes.
By following these steps, you've successfully created an Azure App Service using Azure CLI and given your resume a permanent online home! Now, potential employers can easily find you and learn about your skills. | jimiog |
1,914,066 | Redux persist: https://www.npmjs.com/package/redux-persist | --- npm i redux-persist Enter fullscreen mode Exit fullscreen mode ... | 0 | 2024-07-06T20:17:57 | https://dev.to/debos_das_9a77be9788e2d6e/redux-persist-httpswwwnpmjscompackageredux-persist-5ffa | [](url)---
```
npm i redux-persist
```
```
**store.ts**
import { configureStore } from '@reduxjs/toolkit';
import authReducer from '../features/authSlice';
import { baseApi } from '../api/baseApi';
import { persistReducer, persistStore } from 'redux-persist';
import storage from 'redux-persist/lib/storage';
const persistConfig = {
key: 'auth',
storage,
};
const persistAuthReducer = persistReducer(persistConfig, authReducer);
export const store = configureStore({
reducer: {
[baseApi.reducerPath]: baseApi.reducer,
// auth: authReducer,
auth: persistAuthReducer,
},
middleware: (getDefaultMiddlewares) =>
getDefaultMiddlewares().concat(baseApi.middleware),
});
export type RootState = ReturnType<typeof store.getState>;
// Inferred type: {posts: PostsState, comments: CommentsState, users: UsersState}
export type AppDispatch = typeof store.dispatch;
export const persistor = persistStore(store);
```
```
{% embed <u>**main.tsx**</u>
import { Provider } from 'react-redux';
import { persistor, store } from './redux/features/store.ts';
import { PersistGate } from 'redux-persist/integration/react';
ReactDOM.createRoot(document.getElementById('root')!).render(
<React.StrictMode>
<Provider store={store}>
<PersistGate loading={null} persistor={persistor}>
<RouterProvider router={router}></RouterProvider>
</PersistGate>
</Provider>
</React.StrictMode>);
%}
```
To solved this error
chunk-AA2DKTG5.js?v=b2582f6e:1742 A non-serializable value was detected in an action, in the path: `register`. Value: ƒ register2(key) {
_pStore.dispatch({
type: REGISTER,
key
});
}
Take a look at the logic that dispatched this action:
Object
(See https://redux.js.org/faq/actions#why-should-type-be-a-string-or-at-least-serializable-why-should-my-action-types-be-constants)
(To allow non-serializable values see: https://redux-toolkit.js.org/usage/usage-guide#working-with-non-serializable-data)
**link**
https://redux-toolkit.js.org/usage/usage-guide#use-with-react-redux-firebase
**store.ts**
```
import { configureStore } from '@reduxjs/toolkit';
import authReducer from '../features/authSlice';
import { baseApi } from '../api/baseApi';
import {
persistReducer,
persistStore,
FLUSH,
REHYDRATE,
PAUSE,
PERSIST,
PURGE,
REGISTER,
} from 'redux-persist';
import storage from 'redux-persist/lib/storage';
const persistConfig = {
key: 'auth',
storage,
};
const persistAuthReducer = persistReducer(persistConfig, authReducer);
export const store = configureStore({
reducer: {
[baseApi.reducerPath]: baseApi.reducer,
// auth: authReducer,
auth: persistAuthReducer,
},
middleware: (getDefaultMiddlewares) =>
getDefaultMiddlewares({
serializableCheck: {
ignoredActions: [
FLUSH,
REHYDRATE,
PAUSE,
PERSIST,
PURGE,
REGISTER,
],
},
}).concat(baseApi.middleware),
});
export type RootState = ReturnType<typeof store.getState>;
// Inferred type: {posts: PostsState, comments: CommentsState, users: UsersState}
export type AppDispatch = typeof store.dispatch;
export const persistor = persistStore(store);
```
```
```
| debos_das_9a77be9788e2d6e |
|
1,914,065 | Office for Rent | Finding the Perfect Office for Rent: A Comprehensive Guide Searching for the perfect office for rent... | 0 | 2024-07-06T20:17:54 | https://dev.to/muhammad_mohsin_3f8e62755/office-for-rent-3g28 | Finding the Perfect [Office for Rent](https://superoffice.sa/): A Comprehensive Guide
Searching for the perfect office for rent can be a daunting task, especially in a competitive real estate market. Whether you're a startup looking to establish your first office space or a well-established company seeking to expand, finding an office that meets your needs and fits within your budget is crucial. This guide will walk you through the essential steps and considerations to help you find the ideal office for rent.
Determine Your Needs
Before you start your search, it's important to have a clear understanding of your requirements. Ask yourself the following questions:
How much space do you need?
What is your budget?
What type of location would be most beneficial for your business?
What amenities and facilities are essential for your operations?
Having a clear idea of your needs will help you narrow down your options and make the search process more efficient.
Location, Location, Location
One of the most critical factors in finding the right office for rent is its location. Consider the following aspects:
Proximity to clients and customers: Choose a location that is convenient for your clients to visit.
Accessibility: Ensure the office is easily accessible by public transportation and has ample parking space.
Neighborhood: Evaluate the safety, amenities, and overall vibe of the neighborhood. A vibrant area can enhance employee satisfaction and attract talent.
Budget Considerations
Your budget will play a significant role in determining the office space you can afford. It's important to consider not only the monthly rent but also additional costs such as utilities, maintenance, and insurance. Be realistic about what you can afford and look for offices that offer good value for money. Remember, a higher rent might be justified by better facilities and a prime location.
Office Layout and Design
The layout and design of the office are crucial for productivity and employee satisfaction. When looking at potential offices for rent, consider:
Open vs. closed spaces: Depending on your business type, you may prefer an open-plan office for better collaboration or private offices for confidentiality.
Flexibility: Look for spaces that can be easily reconfigured as your business grows.
Natural light: Offices with ample natural light can boost employee morale and productivity.
Amenities and Facilities
An office for rent should come with the necessary amenities and facilities to support your business operations. These may include:
High-speed internet and reliable IT infrastructure
Meeting rooms and conference facilities
Kitchen and break areas
Security and surveillance systems
On-site maintenance and cleaning services
Lease Terms and Flexibility
When renting an office, it's essential to carefully review the lease terms. Pay attention to:
Lease duration: Short-term leases offer flexibility, while long-term leases provide stability.
Rent escalation: Understand how and when rent increases will occur.
Exit clauses: Ensure there are clear terms for ending the lease if needed.
Negotiating favorable terms can save you money and provide peace of mind.
Working with a Real Estate Agent
Enlisting the help of a real estate agent can significantly simplify the process of finding an[ office for rent](https://superoffice.sa/). Agents have extensive knowledge of the local market and can help you find properties that match your criteria. They can also assist with negotiations and ensure you get the best possible deal.
Making the Decision
Once you've shortlisted a few potential offices for rent, it's time to make a decision. Arrange for site visits to get a feel for the spaces and their surroundings. During these visits, take note of the office's condition, the building's maintenance, and the responsiveness of the landlord or property manager.
Discuss the options with your team and consider their feedback. After weighing all the factors, choose the office that best meets your needs and budget.
Conclusion
Finding the perfect [office for rent](https://superoffice.sa/) requires careful consideration of various factors, including location, budget, layout, amenities, and lease terms. By taking the time to evaluate your needs and exploring multiple options, you can secure an office space that supports your business growth and fosters a productive work environment. Whether you're a startup or an established company, the right office for rent can be a catalyst for your success. | muhammad_mohsin_3f8e62755 |
|
1,914,063 | Hand Gesture Machine Learning Model | Empowering the blind with the magic of gestures! My hand gesture recognition project turns everyday... | 0 | 2024-07-06T20:08:29 | https://dev.to/swhaadi/hand-gesture-machine-learning-model-856 | python, webdev, developers, ai | Empowering the blind with the magic of gestures! My hand gesture recognition project turns everyday hand movements into powerful communication tools. Using the latest in AI and computer vision, I've crafted a system that translates gestures into spoken words, opening up a world of interaction and independence. | swhaadi |
1,914,051 | Creating a home server with CasaOS on Debian from that old dusty PC in your closet. | Introduction Setting up a home server can be an exciting project, especially when you aim... | 0 | 2024-07-06T19:41:20 | https://dev.to/jpdengler/creating-a-home-server-with-casaos-on-debian-from-that-old-dusty-pc-in-your-closet-22ao | webdev, tutorial, serverless, beginners | ## Introduction
Setting up a home server can be an exciting project, especially when you aim to centralize backups, file sharing, and possibly even media streaming. Recently, I decided to repurpose my old desktop as a home server using Debian as the base operating system. During the process, I encountered a black screen issue caused by my graphics card, but removing the GPU resolved it since a home server doesn't require a dedicated graphics card. In this guide, I will walk you through the steps to install Debian on an old PC and then install CasaOS on your Debian home server.
## Prerequisites
1. An old desktop, laptop, Raspberry Pi, or any computer that can install Debian.
2. A USB/External drive (at least 8GB) for flashing.
3. Software such as [Rufus (Windows)](https://rufus.ie/en/) or [Etcher (Mac/Linux)](https://etcher.balena.io)to flash the Debian iso to the USB drive.
4. Basic knowledge of terminal commands.
## Step 1: Install Debian on Your Old PC
### Download Debian
1. Go to the [Debian website](https://www.debian.org/distrib/) and download the latest stable version of Debian. Choose the appropriate ISO file for your system architecture (usually `amd64` for modern PCs).
### Create a Bootable USB Drive
1. Use a tool like Rufus or Etcher to create a bootable USB drive with the downloaded Debian ISO file.
2. Insert the USB drive into your old PC.
### Boot from USB and Install Debian
1. Boot your old PC from the USB drive. You may need to change the boot order in the BIOS settings to prioritize USB boot, this is dependent on your MOBO bios.
2. Follow the on-screen instructions to install Debian. Here are some key points:
- Select your language, location, and keyboard layout.
- Configure the network (you can set up a static IP later if needed).
- Set up the root password and create a new user.
- Partition the disk (the guided option is recommended for beginners).
- Select the software to install. At the software selection screen, choose:
- Debian desktop environment
- GNOME (or any of the preferred desktop environments, you could go
UI less and stick with terminal for performance but odds are you
won't have major issues with that using GNOME or a basic interface)
- Web server
- SSH server
- Standard system utilities
Once Debian is up and running, be sure to update packages and that bash and curl commands are installed (bash should already be installed but feel free to check):
```
sudo apt-get update
```
```
sudo apt-get install bash
```
```
sudo apt-get install curl
```
You can verify installations:
```
bash --version
curl --version
```
### Troubleshooting
- If you encounter a black screen with just a mouse cursor after installing Debian with the GNOME desktop environment, it could be due to issues with the display manager or graphics drivers. In my case, removing the graphics card was the key to resolve the issue.
- You can also access the TTY2 by pressing CTR+ALT+F2 to bring up the terminal/login and install drivers (dependent on system) from there if needed. Further troubleshooting may be needed if encountered and the above doesn't resolve anything, feel free to reach out for assistance!
- Check Logs: If you encounter other issues, check system logs using:
```
journalctl -xe
```
## Step 2: Install CasaOS
[CasaOS](https://casaos.io) provides a straightforward installation script that sets everything up for you. To install CasaOS, run the following command in your terminal on the newly created Debian machine (BY THIS POINT YOU SHOULD KNOW THE MACHINES IP AND LOGIN DETAILS):
```
bash
curl -fsSL https://get.casaos.io | sudo bash
```
CasaOS should take several minutes to execute and install dependencies. Once complete, you should be able to access the CasaOS interface be either entering:
```
casaos
```
or going to any web browser (connected to your router) and entering the IP, port, and then /#/:
```
EX: 196.168.1.1:81/#/
```
If you are having trouble finding or remembering the IP, simple enter this into the Debian terminal:
```
hostname -I
```
## Completion
Congratulations, you now have a fully functioning home server. You still have plenty to configure, but CasaOS has an entire app store with detailed, documented, open-source programs to accomplish many things, including home media server, photo backups (goodbye Google Photos), and so much more. By default, the installation already includes a file system ready to implement between the many machines using your network.
If you found this guide helpful, share it with others who might benefit from setting up their own home server and give me a like! Happy hosting!
Feel free to ask any questions, share your experiences, or help debug in the comments below. | jpdengler |
1,914,050 | How to save time when run RSpec tests | two tips that help a lot to save time when running test suites on Rails with RSpec. 1.... | 0 | 2024-07-06T19:39:19 | https://dev.to/alanmaik/how-to-save-time-when-run-rspec-tests-10ld | rails, tdd, test, rspec | **two tips that help a lot to save time when running test suites on Rails with RSpec.**
## 1. Reduce Devise.stretches
> Note: _This tip is useful if you are using Devise as an
> authentication tool._
In your spec/test.rb file, add the following line:
`Devise.stretches = 1`
When using Devise, the cost value is set by a class variable called stretches, with a default value of 11. It specifies the number of times the password is hashed. By setting this value lower, you make the hash algorithm less costly and time-consuming, saving time in the test suite as it's unnecessary to have such a secure password in our testing environment.
## 2. Increase log level in the test environment
In your spec/test.rb file, add the following line:
`Rails.logger.level = 4`
Rails logs everything that happens in your test environment by default to "log/test.log". By increasing the logger level, you reduce IO during your tests. The downside is that if a test fails, nothing will be logged. In such cases, simply comment out the above configuration option and rerun your tests.
These two tips already help you save a lot of time when running the test suite with RSpec. Hope this helps!
| alanmaik |
1,913,615 | Getting started with Pionia Framework | For this specific article, I will save you from the backgrounds and inspirations of the framework.... | 0 | 2024-07-06T19:30:29 | https://dev.to/jet_ezra/getting-started-with-pionia-frameowrk-54lo | webdev, pionia, restapi, php | For this specific article, I will save you from the backgrounds and inspirations of the framework. You can always find those in the [official framework documentation here](https://pionia.netlify.app).
However, let's get to work and draft a simple API in less than 20 minutes.
The following sections assume you're running PHP 8.1+, the composer is already set up and you have any RDBMS database preferably one of MySQL and Postgres.
## What we shall be working on today.
We shall create an API that:-
1. Creates a todo
2. Deletes a todo
3. Marks a todo as complete
4. Queries completed todos
5. Queries 1 or more random incomplete todo\[s\]
6. Returns a list of all todos
7. Returns a list of paginated todos
8. Updates a todo
9. Returns a single todo items
10. Returns overdue todos
This sounds and looks simple, but by the end of the day, you shall be able to perform all CRUD operations in Pionia, data filtration and interacting with Pionia APIs.
Our project shall be called todoApp.
For starters, we shall need to bootstrap a Pionia project using the following command.
```bash
composer create-project pionia/pionia-app todoApp
```
On successful installation, you should have a directory [similar to this](https://pionia.netlify.app/documentation/application-structure/) though missing a few folders. Our focus folder is **app/services.** Other folders can be added when needed especially using our `pionia` command.
Pionia does not use models, therefore, it can work with only existing databases. For starters, you need to create your database, whether in Postgres, SQLite, MySQL, or any other database supported by PHP PDO.
For this guide, we shall use MySQL and create a database called `todo_app_db` . In your `mysql` console run the following.
```sql
CREATE DATABASE todo_app_db;
use todo_app_db;
```
Then, let's add the table that we shall be working with.
```sql
create table todo
(
id bigint auto_increment,
title varchar(225) null,
description text null,
created_at timestamp default CURRENT_TIMESTAMP null,
start_date date not null,
end_date date not null,
completed bool default false null,
constraint table_name_pk
primary key (id)
);
```
This is all outside the Pionia framework. Let's come back to Pionia now.
We already have our default switch targeting `/api/v1/` registered already. This can be viewed in the `routes.php` file.
```php
use Pionia\Core\Routing\PioniaRouter;
$router = new PioniaRouter();
$router->addSwitchFor("application\switches\MainApiSwitch");
return $router->getRoutes();
```
And if we look at `application\switches\MainApiSwitch`, we find it is registering the `UserService`. Let's drop that and create our service. Remember to remove the import too - `use application\services\UserService;`
```php
public function registerServices(): array
{
return [
'user' => new UserService(), // remove this
];
}
}
```
Now it should be looking like this.
```php
public function registerServices(): array
{
return [
];
}
}
```
Head over to `services` folder and remove the `UserService` too. We want to add our own.
In your terminal, run the following command.
```bash
php pionia addservice todo
```
This shall create our new service `TodoService` in the services folder looking like this.
```php
<?php
/**
* This service is auto-generated from pionia cli.
* Remember to register your this service as TodoService in your service switch.
*/
namespace application\services;
use Pionia\Request\BaseRestService;
use Pionia\Response\BaseResponse;
class TodoService extends BaseRestService
{
/**
* In the request object, you can hit this service using - {'ACTION': 'getTodo', 'SERVICE':'TodoService' ...otherData}
*/
protected function getTodo(?array $data, ?array $files): BaseResponse
{
return BaseResponse::JsonResponse(0, 'You have reached get action');
}
/**
* In the request object, you can hit this service using - {'ACTION': 'createTodo', 'SERVICE':'TodoService' ...otherData}
*/
protected function createTodo(?array $data, ?array $files): BaseResponse
{
return BaseResponse::JsonResponse(0, 'You have reached create action');
}
/**
* In the request object, you can hit this service using - {'ACTION': 'listTodo', 'SERVICE':'TodoService' ...otherData}
*/
protected function listTodo(?array $data, ?array $files): BaseResponse
{
return BaseResponse::JsonResponse(0, 'You have reached list action');
}
/**
* In the request object, you can hit this service using - {'ACTION': 'deleteTodo', 'SERVICE':'TodoService' ...otherData}
*/
protected function deleteTodo(?array $data, ?array $files): BaseResponse
{
return BaseResponse::JsonResponse(0, 'You have reached delete action');
}
}
```
Before doing anything else, let's first register our service in the `MainApiSwitch` in our services under `registerServices` like this.
Also, since we don't intend to upload anything, let's remove all `?array $files` from our actions.
```php
public function registerServices(): array
{
return [
'todo' => new TodoService(),
];
}
```
So, let's test what we have so far. Run the server using the following command.
```php
php pionia serve
```
Your app is being served under `http://localhost:8000` but your API is served under `/api/v1/` . Let's first open `http://localhost:8000`, you should see the following.
Now let's try to open `http://localhost:8000/api/v1` in browser. If you have JSONViewer installed, you should see this.
All `get` requests in Pionia will return the above! Therefore to test our service we need to make POST requests, we might not pull that off in the browser, so, I suggest we use Postman.
Fire up your postman or whatever you want to use. I will use Postman. All our services can receive either JSON or form data. Form data should be preferred for file uploads.
For now, let's send JSON data.
```json
{
"SERVICE": "todo",
"ACTION": "getTodo"
}
```
And we should get back the following.
```json
{
"returnCode": 0,
"returnMessage": "You have reached get action",
"returnData": null,
"extraData": null
}
```
This is what we are returning in our `getTodo`:-
```php
protected function getTodo(?array $data): BaseResponse
{
return BaseResponse::JsonResponse(0, 'You have reached get action');
}
```
More about how we discovered the right action can be found [here in the official docs](https://pionia.netlify.app/documentation/services/)
Now, let's add our database settings in our `settings.ini` file like this.
```ini
[db]
;change this to your db name
database = "todo_app_db"
;change this to your db username
username = "root"
type = "mysql"
host = "localhost"
password = ""
port = 3306
```
To see what is happening in real time, Pionia ships in with a logger, open a new terminal window and run the following command.
```ini
tail -f server.log
```
You can also edit the logging behaviour in the settings file as below.
```ini
[SERVER]
port=8000
DEBUG=true
LOG_REQUESTS=true
PORT=8000
LOG_DESTINATION=server.log ; the file to log to.
NOT_FOUND_CODE=404
UNAUTHENTICATED_CODE=401
SERVER_ERROR_CODE=500
HIDE_IN_LOGS= ; what fields should be encrypted in logs
HIDE_SUB= ; the string to replace with the hidde value default is ********
LOGGED_SETTINGS= ; the settings to add in logs eg db,SERVER
LOG_FORMAT=TEXT ; can be json or test
;APP_NAME= ; you can override this as the app name. default is Pionia.
```
After setting this up, you be able to now view all requests and responses in your terminal.
So far we have not yet started coding anything. Just adding optional configurations to our app.
Let's start by creating a todo in our `createTodo` action.
```php
protected function createTodo(?array $data): BaseResponse
{
$this->requires(['title', 'description', 'start_date', 'end_date']);
$title = $data['title'];
$description = $data['description'];
$startDate = date( 'Y-m-d', strtotime($data['start_date']));
$endDate = date( 'Y-m-d', strtotime($data['end_date']));
$saved = Porm::table('todo')->save([
'title' => $title,
'description' => $description,
'start_date' => $startDate,
'end_date' => $endDate
]);
return BaseResponse::JsonResponse(0,
'You have successfully created a new todo',
$saved
);
}
```
Then let's send our request to target this action with all the required data like this.
```json
{
"SERVICE": "todo",
"ACTION": "createTodo",
"title": "Am a brand new todo",
"description":"Am the description of the brand new todo",
"start_date":"12/12/2024",
"end_date":"06/06/2024"
}
```
And we shall get back our response like this.
```json
{
"returnCode": 0,
"returnMessage": "You have successfully created a new todo",
"returnData": {
"id": 12,
"title": "Am a brand new todo",
"description": "Am the description of the brand new todo",
"created_at": "2024-07-06 22:23:47",
"start_date": "2024-12-12",
"end_date": "2024-06-06",
"completed": 0
},
"extraData": null
}
```
To shed some light on what is going on. The client requested `/api/v1/`, in the request, the client defined the `SERVICE` it is targeting, and the `ACTION`. This came straight to our `index.php` which also calls the kernel and sends all these requests to it.
The kernel sanitises the request and checks if there is an endpoint that handles `/api/v1`, it then sends the entire sanitised request to the switch in our case, the `MainApiSwich`, this in turn checks if it has any `service` that matches the `SERVICE` name that came through our request. It discovered that there is and it is called `TodoService`. It loads this service and calls the method that matches the name of the `ACTION` key, passing along all the request data as `$data`.
The action also expects certain data to be available in the request. This can be observed on this line.
```php
$this->requires(['title', 'description', 'start_date', 'end_date']);
```
If any of the required data is not found on the request. The request will abort with a clean exception. Let's test this.
In your postman, delete the `title` key and send it as follows:-
```json
{
"SERVICE": "todo",
"ACTION": "createTodo",
"description":"Am the description of the brand new todo",
"start_date":"12/12/2024",
"end_date":"06/06/2024"
}
```
This will fail like below:-
```json
{
"returnCode": 500,
"returnMessage": "The field title is required",
"returnData": null,
"extraData": null
}
```
Notice that all scenarios still return an HTTP Status Code of 200 OK, but different returnCode\[s\]. Also, notice that the response format stays the same throughout. This is [moonlight pattern](https://pionia.netlify.app/moonlight/introduction-to-moonlight-architecture/) in action!
This is how you can pull off actions in Pionia. However, Pionia suggests that if what you are looking for is just CRUD, then you can look into [Generic Services](https://pionia.netlify.app/documentation/generic-services/). If you do not know about generic services, you can read about these in [one of my articles here](https://hashnode.com/post/cly9sd3zk000f09l6cy3qdjbj).
So, proceeding, let's first create the entire CRUD and see what generic services can help us reduce.
Full-Service code so far for our `TodoService`
```php
<?php
/**
* This service is auto-generated from pionia cli.
* Remember to register this service as TodoService in your service switch.
*/
namespace application\services;
use Exception;
use Pionia\Exceptions\FailedRequiredException;
use Pionia\Request\BaseRestService;
use Pionia\Request\PaginationCore;
use Pionia\Response\BaseResponse;
use Porm\database\aggregation\Agg;
use Porm\database\builders\Where;
use Porm\exceptions\BaseDatabaseException;
use Porm\Porm;
class TodoService extends BaseRestService
{
/**
* In the request object, you can hit this service using - {'ACTION': 'getTodo', 'SERVICE':'TodoService' ...otherData}
* @throws Exception
*/
protected function getTodo(?array $data): BaseResponse
{
$this->requires(['id']);
$id = $data['id'];
$todo = Porm::table('todo')->get($id);
return BaseResponse::JsonResponse(0, null, $todo);
}
/**
* In the request object, you can hit this service using - {'ACTION': 'createTodo', 'SERVICE':'TodoService' ...otherData}
* @throws Exception
*/
protected function createTodo(?array $data): BaseResponse
{
$this->requires(['title', 'description', 'start_date', 'end_date']);
$title = $data['title'];
$description = $data['description'];
$startDate = date( 'Y-m-d', strtotime($data['start_date']));
$endDate = date( 'Y-m-d', strtotime($data['end_date']));
$saved = Porm::table('todo')->save([
'title' => $title,
'description' => $description,
'start_date' => $startDate,
'end_date' => $endDate
]);
return BaseResponse::JsonResponse(0,
'You have successfully created a new todo',
$saved
);
}
/**
* In the request object, you can hit this service using - {'ACTION': 'listTodo', 'SERVICE':'TodoService' ...otherData}
* @throws BaseDatabaseException
*/
protected function listTodo(?array $data): BaseResponse
{
$todos = Porm::table('todo')->all();
return BaseResponse::JsonResponse(0, null, $todos);
}
/**
* In the request object, you can hit this service using - {'ACTION': 'deleteTodo', 'SERVICE':'TodoService' ...otherData}
* @throws Exception
*/
protected function deleteTodo(?array $data): BaseResponse
{
$this->requires(['id']);
$id = $data['id'];
Porm::table('todo')->delete($id);
return BaseResponse::JsonResponse(0, 'To-do deleted successfully');
}
/**
* In the request object, you can hit this service using - {'ACTION': 'deleteTodo', 'SERVICE':'TodoService' ...otherData}
* @throws Exception
*/
protected function updateTodo(?array $data): BaseResponse
{
$this->requires(['id']);
$id = $data['id'];
$todo = Porm::table('todo')->get($id);
if (!$todo) {
throw new Exception("Todo with id $id not found");
}
$title = $data['title'] ?? $todo->title;
$description = $data['description'] ?? $todo->description;
$startDate = isset($data['start_date']) ? date( 'Y-m-d', strtotime($data['start_date'])) : $todo->start_date;
$endDate = isset($data['end_date']) ? date( 'Y-m-d', strtotime($data['end_date'])) : $todo->end_date;
$completed = $data['completed'] ?? $todo->completed;
Porm::table('todo')->update([
'title' => $title,
'description' => $description,
'start_date' => $startDate,
'end_date' => $endDate,
'completed' => $completed
], $id);
$newTodo = Porm::table('todo')->get($id);
return BaseResponse::JsonResponse(0, 'To-do updated successfully', $newTodo);
}
/**
* @param $data
* @return BaseResponse
* @throws BaseDatabaseException
* @throws Exception
*/
protected function randomTodo($data): BaseResponse
{
$size = $data['size'] ?? 1;
$todos = Porm::table('todo')->random($size);
return BaseResponse::JsonResponse(0, null, $todos);
}
/**
* @param $data
* @return BaseResponse
* @throws BaseDatabaseException
* @throws Exception
*/
protected function markComplete($data): BaseResponse
{
$this->requires(['id']);
$id = $data['id'];
$todo = Porm::table('todo')->get($id);
if (!$todo) {
throw new Exception("Todo with id $id not found");
}
if ($todo->completed) {
throw new Exception("Todo with id $id is already completed");
}
Porm::table('todo')->update(['completed' => 1], $id);
$newTodo = Porm::table('todo')->get($id);
return BaseResponse::JsonResponse(0, 'To-do marked as completed', $newTodo);
}
/**
* @throws BaseDatabaseException
*/
protected function listCompletedTodos(): BaseResponse
{
$todos = Porm::table('todo')->where(['completed' => true])->all();
return BaseResponse::JsonResponse(0, null, $todos);
}
/**
* @throws BaseDatabaseException
*/
protected function listPaginatedTodos($data): BaseResponse
{
$limit = $data['limit'] ?? 5;
$offset = $data['offset'] ?? 0;
$paginator = new PaginationCore($data, 'todo', $limit, $offset);
$todos = $paginator->paginate();
return BaseResponse::JsonResponse(0, null, $todos);
}
/**
* @throws BaseDatabaseException
*/
protected function listOverdueTodos(): BaseResponse
{
$today = date('Y-m-d');
$todos = Porm::table('todo')
->where(
Where::builder()->and([
"end_date[<]" => $today,
'completed' => false
])->build())
->all();
return BaseResponse::JsonResponse(0, null, $todos);
}
}
```
With the above, we have completed our entire checklist of all we needed to cover. Play with it in Postman to see if everything is functioning properly.
As you have noticed it, we only focused on services, nothing like controllers, routes, models!! This is how Pionia is changing how we develop APIs.
Let me know what you say about this framework in the comment section below.
Happy coding! | jet_ezra |
1,914,049 | HTML Semantic Elements(A to Z) | HTML Semantic Elements: A Comprehensive Guide HTML semantic elements clearly describe... | 0 | 2024-07-06T19:26:54 | https://dev.to/ridoy_hasan/html-semantic-elementsa-to-z-56p | webdev, beginners, programming, html | ### HTML Semantic Elements: A Comprehensive Guide
HTML semantic elements clearly describe their meaning in a way that both the browser and the developer can understand. They enhance the readability and accessibility of web pages. This guide explores various semantic elements, their purposes, and practical code examples.
#### What Are Semantic Elements?
Semantic elements are HTML elements that convey meaning about the content they contain. Unlike non-semantic elements like `<div>` and `<span>`, semantic elements provide a clear structure to the web page.
#### Common HTML Semantic Elements
1. **`<header>`**: Defines a header for a document or a section.
2. **`<nav>`**: Defines a container for navigation links.
3. **`<article>`**: Represents a self-contained piece of content.
4. **`<section>`**: Defines a section in a document.
5. **`<aside>`**: Defines content aside from the content it is placed in.
6. **`<footer>`**: Defines a footer for a document or a section.
7. **`<main>`**: Specifies the main content of a document.
8. **`<figure>`**: Specifies self-contained content, like illustrations or diagrams.
9. **`<figcaption>`**: Provides a caption for a `<figure>` element.
10. **`<time>`**: Represents a specific time or date.
#### Example: Using Semantic Elements
Let's create a simple webpage using semantic elements to demonstrate their usage.
**HTML Code:**
```html
<!DOCTYPE html>
<html>
<head>
<title>Semantic HTML Example</title>
</head>
<body>
<header>
<h1>Welcome to My Website</h1>
<nav>
<ul>
<li><a href="#home">Home</a></li>
<li><a href="#about">About</a></li>
<li><a href="#contact">Contact</a></li>
</ul>
</nav>
</header>
<main>
<section id="home">
<h2>Home</h2>
<p>This is the home section of the webpage.</p>
</section>
<section id="about">
<h2>About</h2>
<article>
<h3>About Us</h3>
<p>We are a company that values excellence and innovation.</p>
</article>
</section>
<section id="contact">
<h2>Contact</h2>
<aside>
<h3>Contact Information</h3>
<p>Email: [email protected]</p>
<p>Phone: 123-456-7890</p>
</aside>
</section>
</main>
<footer>
<p>© 2024 My Website. All rights reserved.</p>
</footer>
</body>
</html>
```
**Output:**
**Welcome to My Website**
- Home
- About
- Contact
**Home**
This is the home section of the webpage.
**About**
***About Us***
We are a company that values excellence and innovation.
**Contact**
***Contact Information***
Email: [email protected]
Phone: 123-456-7890
© 2024 My Website. All rights reserved.
In this example, we use semantic elements like `<header>`, `<nav>`, `<main>`, `<section>`, `<article>`, `<aside>`, and `<footer>` to structure the webpage. These elements improve the readability of the HTML code and help search engines and assistive technologies understand the content better.
#### Benefits of Using Semantic Elements
- **Improved Readability**: Semantic elements make the HTML code more readable and understandable for developers.
- **Better SEO**: Search engines can better understand and index the content, improving search engine rankings.
- **Enhanced Accessibility**: Assistive technologies can better interpret the content, improving the user experience for people with disabilities.
- **Consistent Structure**: Provides a consistent and standardized way to structure web pages.
### Conclusion
Understanding and using HTML semantic elements is essential for creating well-structured, accessible, and SEO-friendly web pages. By incorporating these elements into your projects, you can improve the readability and functionality of your web content.
## FOLLOW ME ON LINKEDIN -
https://www.linkedin.com/in/ridoy-hasan7 | ridoy_hasan |
1,914,048 | Are All Swift Functions Actually Returning Tuples? | Contents Introduction The Genesis of the Theory Unraveling the Tuple Mystery The Swift... | 0 | 2024-07-06T19:25:51 | https://asafhuseyn.com/blog/2024/07/06/Are-All-Swift-Functions-Actually-Returning-Tuples.html | swift, ios, mobile, tuple | ## Contents
1. [Introduction](#introduction)
2. [The Genesis of the Theory](#the-genesis-of-the-theory)
3. [Unraveling the Tuple Mystery](#unraveling-the-tuple-mystery)
4. [The Swift Type System: A Deeper Dive](#the-swift-type-system-a-deeper-dive)
5. [Void in Swift vs. Other Languages](#void-in-swift-vs-other-languages)
6. [Implications and Reflections](#implications-and-reflections)
7. [Conclusion](#conclusion)
8. [References](#references)
## Introduction
Swift, known for its expressive and powerful type system, continues to surprise developers with its intricate design decisions. Today, we're diving deep into a fascinating theory that could reshape our understanding of Swift's function return types: Are all Swift functions secretly returning tuples? (Like SwiftUI does for Views)
## The Genesis of the Theory
This intriguing question arose while investigating the subtle differences between `()` and `Void` in Swift. At first glance, these two seem interchangeable, often described as representing "nothing" or an empty return type. However, a closer look reveals some surprising behavior:
```swift
// This works fine
let emptyTuple: () = ()
// This causes an error: "Expected member name or constructor call after type name"
let emptyVoid: Void = Void
```
To understand this discrepancy, we need to peek into Swift's source code:
```swift
public typealias Void = ()
```
This revelation is the cornerstone of our theory. If `Void` is just an alias for an empty tuple, could this tuple-based representation extend to all function return types in Swift?
## Unraveling the Tuple Mystery
Let's explore this theory with some intriguing examples:
### Single-Element Tuples and Singular Values
```swift
let a: Int = 5
let b: (Int) = (5)
print(type(of: a)) // Output: Int
print(type(of: b)) // Output: Int
print(a == b) // Output: true
```
Surprisingly, Swift treats `b`, declared as a single-element tuple, identical to `a`, a regular `Int`. This behavior suggests that Swift might be automatically "unwrapping" single-element tuples.
### Function Return Types
```swift
func returnInt() -> Int { return 5 }
func returnTuple() -> (Int) { return (5) }
print(type(of: returnInt())) // Output: Int
print(type(of: returnTuple())) // Output: Int
let result1 = returnInt()
let result2 = returnTuple()
print(type(of: result1)) // Output: Int
print(type(of: result2)) // Output: Int
let sum = result1 + result2 // Works seamlessly
```
Despite the different return type declarations, both functions behave identically. This consistency across seemingly different types further supports our tuple theory.
## The Swift Type System: A Deeper Dive
To understand this behavior, we need to explore Swift's type system more thoroughly. Swift employs a concept called "type erasure" for single-element tuples. This means that at runtime, Swift treats single-element tuples as equivalent to their contained type.
### The Hidden Tuple Structure
While Swift presents single-element tuples as their contained type, the tuple structure might still exist behind the scenes. This becomes evident when we try to access tuple elements:
```swift
func returnTuple() -> (Int) { return (5) }
let result = returnTuple()
print(type(of: result)) // Output: Int
// print(result.0) // This would cause a compile-time error
```
The error we get when trying to access `result.0` suggests that Swift is performing some magic to hide the tuple structure while preserving type information.
## Void in Swift vs. Other Languages
The concept of `Void` in Swift is handled differently compared to some other programming languages. Let's explore these differences:
### C and C++
In C and C++, `void` is a fundamental type that represents the absence of a value. It's commonly used as a return type for functions that don't return anything.
```c
void noReturnFunction() {
// Function body
}
```
### C#
C# uses `void` similarly to C and C++, as a keyword indicating no return value.
```csharp
void NoReturnMethod()
{
// Method body
}
```
### Swift and Rust
Swift takes a different approach, aligning more closely with Rust's philosophy. In both languages, the concept of "no value" is represented using an empty tuple `()`.
Swift:
```swift
typealias Void = ()
func noReturnFunction() -> Void {
// Function body
}
```
Rust:
```rust
fn no_return_function() -> () {
// Function body
}
```
This approach in Swift and Rust provides more consistency with the type system, as `()` is a valid type that can be used in other contexts, unlike the `void` keyword in C-like languages.
## Implications and Reflections
The idea that all Swift functions might be returning tuples has several interesting implications:
1. **Type System Consistency**: This theory aligns with Swift's goal of a consistent and expressive type system. By treating single-element tuples as their contained type, Swift maintains simplicity while allowing for potential future expansions.
2. **Performance and Optimization**: The compiler's handling of single-element tuples could have subtle performance implications, especially in high-performance code. However, for most developers, this is likely to be a non-issue due to compiler optimizations.
3. **API Design Considerations**: Understanding this behavior could influence how we design function signatures, potentially leading to more flexible and future-proof APIs. However, it's important not to over-engineer based on this theory alone.
4. **Language Evolution**: This behavior might influence future Swift proposals, possibly leading to more advanced tuple-related features. As the language evolves, developers should stay informed about changes in this area.
While these implications are intriguing, it's important to remember that for most day-to-day Swift programming, the underlying tuple nature of function returns (if true) doesn't significantly impact how we write or think about our code. The real value of this theory lies in deepening our understanding of Swift's design philosophy and type system intricacies.
As Swift developers, we should:
- Be aware of this potential behavior, especially when working with complex types or performance-critical code.
- Keep an eye on Swift evolution proposals related to tuples and return types.
- Focus on writing clear, expressive code, letting the compiler handle these lower-level details.
Ultimately, whether all functions return tuples or not, Swift's design ensures that we can write safe, expressive, and performant code without getting bogged down in these implementation details.
## Conclusion
While we can't definitively state that all Swift functions return tuples without official confirmation from the Swift core team, this theory opens up fascinating avenues for understanding and leveraging Swift's type system.
As Swift continues to evolve, insights like these push the boundaries of what's possible with the language. They challenge us to think deeper about the design decisions behind Swift and how we can use them to write more expressive, safer, and more efficient code.
Whether this theory is ultimately confirmed or not, it serves as a testament to the depth and complexity of Swift's design. It encourages us to keep exploring, questioning, and pushing the limits of what we can achieve with this powerful language.
What are your thoughts on this theory? Have you observed similar behaviors or have alternative explanations? Let's continue this discussion and collectively unravel the mysteries of Swift together!
## References
1. Swift Language Guide: [https://docs.swift.org/swift-book/documentation/the-swift-programming-language/thebasics/](https://docs.swift.org/swift-book/documentation/the-swift-programming-language/thebasics/)
2. Swift Evolution: [https://github.com/apple/swift-evolution](https://github.com/apple/swift-evolution)
3. Rust Documentation on Unit type: [https://doc.rust-lang.org/std/primitive.unit.html](https://doc.rust-lang.org/std/primitive.unit.html)
4. C++ Reference on void type: [https://en.cppreference.com/w/cpp/language/types](https://en.cppreference.com/w/cpp/language/types)
5. C# Documentation on void: [https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/builtin-types/void](https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/builtin-types/void) | asafhuseyn |
1,914,023 | jwt decode link: https://www.npmjs.com/package/jwt-decode | npm i jwt-decode verifyJwt.ts**** import { jwtDecode } from 'jwt-decode'; export const verifyToken... | 0 | 2024-07-06T18:58:52 | https://dev.to/debos_das_9a77be9788e2d6e/jwt-decode-link-httpswwwnpmjscompackagejwt-decode-523c | npm i jwt-decode
1.
verifyJwt.ts****
import { jwtDecode } from 'jwt-decode';
export const verifyToken = (token: string) => {
return jwtDecode(token);
};
2.
Login.tsx****
const onSubmit = async (data) => {
console.log(data);
const userInfo = {
id: data.id,
password: data.password,
};
const res = await login(userInfo).unwrap();
const user = verifyToken(res.data.accessToken);
dispatch(setUser({ user: user, token: res.data.accessToken }));
};
| debos_das_9a77be9788e2d6e |
|
1,914,018 | Expondo seu localhost com Ngrok (muito útil para testar webhooks) | Os problemas de "na minha máquina funciona" acabaram! Problema Estava precisando fazer... | 0 | 2024-07-06T18:58:51 | https://dev.to/thayto/expondo-seu-localhost-com-ngrok-muito-util-para-testar-webhooks-3hh0 | braziliandevs, webdev, webhooks, tutorial | > Os problemas de "na minha máquina funciona" acabaram!
## Problema
Estava precisando fazer alguns testes de webhooks, porém só conhecia uma maneira que seria deployar a app e só assim conseguir testar os webhooks. Esse método funciona e é muito utilizado por devs. Mas ele tem um problema... todo teste você vai precisar deployar novamente sua aplicação e isso leva bastante tempo.
Pesquisando por aí encontrei o [Ngrok](https://ngrok.com/) e com ele conseguimos expor nosso localhost de forma bem simples.
## Instalação
> você pode seguir a [Documentação Oficial](https://ngrok.com/docs/guides/getting-started/#step-2-install-the-ngrok-agent) também.
### Mac
Use o [Homebrew](https://brew.sh/):
```sh
brew install ngrok/ngrok/ngrok
```
### Linux
Use o apt
```sh
curl -s https://ngrok-agent.s3.amazonaws.com/ngrok.asc | \
sudo gpg --dearmor -o /etc/apt/keyrings/ngrok.gpg && \
echo "deb [signed-by=/etc/apt/keyrings/ngrok.gpg] https://ngrok-agent.s3.amazonaws.com buster main" | \
sudo tee /etc/apt/sources.list.d/ngrok.list && \
sudo apt update && sudo apt install ngrok
```
### Windows
Use o [Chocolatey](https://chocolatey.org/install)
```sh
choco install ngrok
```
## Conecte o seu agent à sua conta do ngrok
Pra isso é necessário que você faça o [log in ou sign up](https://dashboard.ngrok.com/) no Ngrok e pegue seu Authtoken.
Copie o token e adicione no seu terminal
```sh
ngrok config add-authtoken <TOKEN>
```
## Rode o Ngrok
Starte o Ngrok rodando o comando abaixo (você pode escolher a porta que preferir, mas no exemplo utilizei a porta `8000`):
```sh
ngrok http 8000
```
Obrigado por ler até aqui! Espero que esse post te ajude :)
Confira mais em https://thayto.com/links
_Originalmente postado em [https://thayto.com](https://thayto.com/blog/expondo-seu-localhost-com-ngrok) dia 06 de Julho de 2024._
_Cover Image: Photo by <a href="https://unsplash.com/@incrprl?utm_content=creditCopyText&utm_medium=referral&utm_source=unsplash">Stepan Kalinin</a> on <a href="https://unsplash.com/photos/a-woman-standing-on-a-platform-waiting-for-a-train-JzjLO92in88?utm_content=creditCopyText&utm_medium=referral&utm_source=unsplash">Unsplash</a>_ | thayto |
1,913,874 | Debouncing ⏳ Vs Throttling ⏱ | Debouncing and throttling are both used to enhance the website performance by limiting the number of... | 0 | 2024-07-06T18:56:10 | https://dev.to/mrhimanshusahni/debouncing-vs-throttling-2p22 | webdev, javascript, beginners, tutorial | Debouncing and throttling are both used to enhance the website performance by limiting the number of times the events are triggered. Debouncing and throttling are not provided by JavaScript. They’re just concepts that can be implemented using the setTimeout web API.
---
## Debouncing ⏳
> **In the debouncing technique, no matter how many Times the user fires the event, the attached function will be executed only after The specified time once the user stops firing the event.**
## Throttling ⏱
> **Throttling is a Technique in which, no matter how many times the user fires The event, the attached function will be executed only once in a given time interval.**
---
## Comparison between Debouncing and Throttling
---
## Real life Scenarios
**Debounce in Action: Live Search**
Consider a live search feature where users see search results as they type. Debouncing ensures that the search function is triggered only after the user pauses, preventing unnecessary server requests during rapid typing.
---
**Throttle in Action: Scrolling Animation**
Imagine a scroll-triggered animation. Throttling can be applied to update the animation at a controlled rate, preventing a flood of updates and ensuring a smoother visual experience.
---
## Conclusion
Debounce and throttle are indispensable tools in a developer's toolkit, offering precise control over the execution of code in response to user actions.
>**Debounce is your patient friend, waiting for the right moment, while throttle is the regulator, maintaining a steady pace.**
Understanding when and how to apply these concepts can significantly enhance the performance and user experience of your web applications.
---
I hope you liked this article 😀
Happy_Coding 😎
Follow me for more tutorials and tips on web development. Feel free to leave comments or questions below!
## Follow and Subscribe 🤗
Twitter - https://twitter.com/mrHimanshuSahni
Linkedin - https://www.linkedin.com/in/mrhimanshusahni/
Github - https://github.com/mrhimanshusahni
Youtube - https://www.youtube.com/@mrhimanshusahni
| mrhimanshusahni |
1,913,571 | Throttling in JavaScript ⏱🚀 | As a developer, making your website user-friendly is important. This goes a long way toward the... | 0 | 2024-07-06T18:55:48 | https://dev.to/mrhimanshusahni/throttling-in-javascript-2019 | webdev, javascript, beginners, tutorial | As a developer, making your website user-friendly is important. This goes a long way toward the product's success, and a key part of the user experience is the website's performance.
---
## Table of Contents 📃
1. What is Throttling in JavaScript?
2. How to implement Throttling in JavaScript
3. Implement Throttling using a Custom Hook
4. Implementations of throttling in JavaScript libraries
5. Why use Throttling?
6. Use Cases for Throttling
---
## What is Throttling? 🙄
**Throttling is a technique that limits how often a function can be called in a given period of time.** It is useful for improving the performance and responsiveness of web pages that have event listeners that trigger heavy or expensive operations, such as animations, scrolling, resizing, fetching data, etc.
For example, if you have a function that fetches some data from an API every time the user scrolls the page, you might want to throttle it so that it only makes one request every second, instead of making hundreds of requests as the user scrolls. This way, you can avoid overloading the server or the browser with unnecessary requests and reduce the bandwidth consumption.
---
## Pictorial Representation
---
## How to implement Throttling in JavaScript
Let's Take a function **`myFunction(a, b)`** having two arguments.
We want to modify this function so that it can only be called once in **`500ms`**. So, throttling will take **`myFunction()`** as an input, and return a modified (throttled) function **`throttledFun()`** that can only be executed **`500ms`** after the previous function was executed.
By using the above throttled function, we now can have **`throttledFun()`** based on **`myFunction()`**.
---
## Implement Throttling using a Custom Hook
1. Create a new file called as **`useThrottle.js`**.
2. Add the below custom function that we have made above.
Usage of throttling and **`myFunction()`** with custom throttled hook.
---
## Throttling & Debouncing with JavaScript libraries
Libraries such as **Lodash** offer `_.debounce` and `_.throttle` functions, providing a more robust and cross-browser compatible solution.
## Why use Throttling?
1. **Performance Enhancement:** Reduces the number of function executions, prevents Overloading the server or the browser with too many requests or calculations.
2. **Resource Management:** To manage the bandwidth or resources on operations that are not visible or relevant to the user.
3. **Consistent Updates:** Ensures regular updates at specified intervals, useful for tasks like updating a position indicator during scrolling.
---
## Use Cases for Throttling
1. **Scroll event listeners:** Many web applications utilize a scroll event listener to keep track of the scroll position and load or animate the content appropriately. In these cases, the scroll event may have a negative performance impact if we scroll it too frequently since it contains many videos and images. Thus, we must use throttling for the scroll event.
2. **In Gaming:** In games, a player needs to push the button to trigger any action, such as punching, shooting but during playtime, the user can hit the button more than one time in a second, and we want to trigger an action at the rate per second then the concept of Throttling will be useful for it.
3. **API Calls:** In some cases, we may wish to limit how frequently our application calls an external API. In this case, throttling can be advantageous. By rate limiting the calling function, it would eliminate unnecessary API requests to the server.
---
## Conclusion
**Throttling** is a powerful technique for optimizing web applications by controlling the frequency of function executions. By ensuring functions are called at regular intervals, throttling helps manage performance and resource usage effectively. Whether dealing with scrolling, resizing, or other rapid events, throttling is an essential tool in your JavaScript toolkit.
---
I hope you found this blog helpful and learned something new about throttling in JavaScript.
**You can check out my recent articles on**
1. Debouncing in JavaScirpt {% embed https://dev.to/mrhimanshusahni/debouncing-in-javascript-2p3o %}
2. Debouncing vs Throttling {% embed https://dev.to/mrhimanshusahni/debouncing-vs-throttling-2p22 %}
---
I hope you liked this article 😀
Happy_Coding 😎
Follow me for more tutorials and tips on web development. Feel free to leave comments or questions below!
## Follow and Subscribe 🤗
Twitter - https://twitter.com/mrHimanshuSahni
Linkedin - https://www.linkedin.com/in/mrhimanshusahni/
Github - https://github.com/mrhimanshusahni
Youtube - https://www.youtube.com/@mrhimanshusahni
| mrhimanshusahni |
1,914,022 | The Dawn of a New Retail Era | Imagine an online retail world, a realm where product listings are a living, breathing entity -... | 27,673 | 2024-07-06T18:55:00 | https://dev.to/rapidinnovation/the-dawn-of-a-new-retail-era-541a | Imagine an online retail world, a realm where product listings are a living,
breathing entity - constantly evolving, always current. In this world, the
mundane task of updating product details is as archaic as a floppy disk.
Welcome to the future of e-commerce and retail, powered by Robotic Process
Automation (RPA).
## RPA: The Silent Revolutionizer in Retail
RPA is not just a tool; it's a paradigm shift. It's akin to having a tireless
digital workforce, a battalion of virtual assistants who work relentlessly,
24/7, without the need for coffee breaks, vacations, or even sleep. These RPA
bots are the unsung heroes of the retail revolution.
Imagine a bot that knows your inventory like the back of its digital hand. It
updates product listings instantaneously, based on the slightest change in
your stockroom. Got a new shipment of designer handbags? Your RPA bot updates
the inventory numbers before the boxes are even unpacked. Launching a summer
collection? Before the first model hits the runway, your entire range is live
on your site, replete with descriptions, sizes, and vibrant images.
## The Wizardry of Automated Updates: A Tale of Efficiency and Captivation
Enter the enchanting world of automated updates, where RPA bots perform like
modern-day wizards, casting efficiency spells across your e-commerce platform.
Imagine the scene: a fresh shipment of funky t-shirts arrives, and before you
can even think about updating your inventory, your RPA bot has already done
it. Now, add a new line of eco-friendly sneakers into the mix. Instantly, your
site is updated with engaging descriptions, sizes, and a palette of colors,
all thanks to the swift and seamless magic of RPA. This isn't just a time-
saver; it's about captivating your audience at an unprecedented pace.
## Why RPA Reigns Supreme in the Retail Realm
RPA bots don’t just redefine hard work; they epitomize smart work. The era of
human errors in inventory updates and product descriptions is now a bygone
saga. These bots are a paragon of precision, ensuring data accuracy with
unparalleled meticulousness. But their prowess doesn't stop there. They
function at a remarkable speed, transforming mundane tasks into completed
checklists, thus freeing up valuable time for you to strategize and innovate
in the ever-evolving retail landscape.
## Unveiling the Crystal Ball: The RPA-Driven Future
Fast forward to 2025, where your virtual store stands as a testament to
organizational perfection and trend foresight, all powered by RPA. These
systems don't just update listings; they're equipped to predict market trends,
almost like having a crystal ball at your disposal. Meld RPA with predictive
analytics, and you get a formidable tool that’s not just managing the present
but also deciphering the future.
## The Era of Hyper-Personalization
But the future of RPA stretches beyond mere operational efficiency; it's set
to revolutionize customer experience. Envision a tool so intuitive, it
understands your customers’ preferences better than they do. Take Joe, for
instance, a regular customer with a penchant for vintage comic books and a new
pet cat. The moment he logs in, he’s greeted with superhero-themed cat
costumes. This level of personalized customer engagement transcends the
traditional boundaries of sales, creating moments of genuine delight and
forging stronger customer connections.
## Rapid Innovation: Crafting the Future for Go-Getters
In the exhilarating realm of rapid innovation, RPA transcends its role as a
mere productivity tool. For the visionaries, the dreamers, the bold
entrepreneurs, and the creative innovators, RPA is akin to a boundless canvas
of opportunity, brimming with vibrant possibilities. It's a tool that empowers
you to paint your entrepreneurial story in bold, broad strokes.
## Embracing the RPA Magic
If you're standing at the crossroads, wondering how to board the high-speed
train of RPA, let me tell you, it's simpler than you think. Whether you’re the
owner of a boutique store or the CEO of a burgeoning e-commerce empire,
integrating RPA into your business isn't just a smart move; it's your ticket
to staying relevant in a world that's constantly evolving.
## A Glimpse into a Not-So-Distant Future
As we conclude this voyage of discovery, let's pause for a moment and envision
a future that's just around the corner. Imagine stepping into the world of
retail where every operation runs with clockwork precision, where customer
satisfaction isn't just a goal, but a guarantee, and where your product
listings are perpetually up-to-date, accurate, and appealing.
This future, radiant with the promise of RPA, isn’t a distant dream; it’s an
achievable reality. Envision a scenario where your e-commerce platform
understands and adapts to the evolving preferences of every customer, where
supply chains are so robust and adaptable that market fluctuations feel like
gentle ripples instead of tidal waves.
Why not dive into the fascinating world of RPA? This isn’t merely about
keeping pace with technological advancements; it’s about being a trailblazer
in the realm of e-commerce and retail. You have the chance to write your
success story, to be a pioneer in an industry that thrives on innovation. The
future is an open book, and with RPA, you’re holding the pen. Ready to create
your legacy?
📣📣Drive innovation with intelligent AI and secure blockchain technology! Check
out how we can help your business grow!
[Blockchain App Development](https://www.rapidinnovation.io/service-
development/blockchain-app-development-company-in-usa)
[AI Software Development](https://www.rapidinnovation.io/ai-software-
development-company-in-usa)
[Blockchain App Development](https://www.rapidinnovation.io/service-
development/blockchain-app-development-company-in-usa) [AI Software
Development](https://www.rapidinnovation.io/ai-software-development-company-
in-usa)
## URLs
* <https://www.rapidinnovation.io/post/e-commerce-and-retail-horizons-automating-product-listings-seamlessly-with-rpa>
## Hashtags
#RetailRevolution
#RPATransformation
#EcommerceInnovation
#FutureOfRetail
#AutomatedEfficiency
| rapidinnovation |
|
1,914,021 | Stripe Elements in Rails and Payments Without Email Submissions | One of my freelance clients asked for a payment feature that did not require registering an email a... | 0 | 2024-07-06T18:54:41 | https://dev.to/gperilli/stripe-elements-in-rails-and-payments-without-email-submissions-3acf | webdev, stripe, javascript | One of my freelance clients asked for a payment feature that did not require registering an email a year ago, and so I set about coding this using Stripe Elements. If you are building an ecommerce web site, often you might set up an admin login page, where sales, and inventory can be monitored etc., and an authenticated user page where a user can monitor their purchases. The main difference in this case was that the users of the service could put money into the website app, and monitor this amount from their own account, but they would never need to disclose their email address, even at the payment stage. They would never get an emailed receipt in this case aswell.
My personal version of the app is here: [https://github.com/gperilli/fundme](https://github.com/gperilli/fundme)
This is a ready-made “fundme” web app, where users/fans can sign up, login and pay money into a project or artist or something. The amount they pay in can be seen on their post-login page.
## Stripe Payments
Integrating Stripe payments is fairly simple if using the older service from Stripe. Essentially you create a Stripe account, get the account keys, and then set up something to be sold on your site. At the checkout stage the user will be taken to a page hosted by Stripe where the transaction is completed (with a non-customizable email submission).
The main advantage of doing it this way is, that you can spend your time developing your e-commerce site, and you never deal with credit card number submissions, and storage on your database. However if you need more options, and you want to embed the Stripe checkout into your site, then you need Stripe Elements.
## Stripe Elements
A big advantage of Stripe Elements is that the checkout can be put in a modal or something. The user can select the thing they want to buy, fill out their details, and complete the payment without leaving a single page.
For Stripe’s documentation on this, take a look at [here:https://stripe.com/docs/payments/elements](here:https://stripe.com/docs/payments/elements)
The strpe elements checkout is essentially an embeddable iframe with more options than the older Stripe service.
## Using Stripe Elements Within a Rails Framework
My main source for setting up Stripe elements in a Rails framework was this: [https://github.com/cjavilla-stripe/rails-accept-a-payment](https://github.com/cjavilla-stripe/rails-accept-a-payment). The accompanying Youtube video is here: [https://www.youtube.com/watch?v=VY9IwMsMSMY&t=2194s](https://www.youtube.com/watch?v=VY9IwMsMSMY&t=2194s). From that tutorial and sample code, I developed a subscription payment system using Redis to schedule events on the server side using Rails’ background jobs. For more information on background jobs, checkout the [official documentation](https://guides.rubyonrails.org/active_job_basics.html).
Before explaining my approach to developing a monthly / yearly subscription feature, we need to actually test out fake payments using Stripe Elements. The basic flow for achieving this is as follows:
1. The Stripe publishable key (which you get after creating a Stripe account) is used client side to generate an instance of Stripe
2. When the payment form submit button is clicked, the form's submission is delayed using `preventDefault()`, and a POST request is made using Javascript’s fetch to trigger the generation of a Stripe "payment intent".
3. Over on the server side the Stripe payment intent is generated which would require the ammount to be paid etc., and then returned to the client side payment form.
4. The Stripe instance then deals with the payment using the `paymentIntent.client_secret` returned from the `POST` request (credit card handling by Stripe etc.)
5. And, finally the payment form is submitted with the payment intent id pasted into a hidden input in the payment form. In my web app this completes the process by generating a new instance of a Donation model, and recording a payment method id from Stripe which can be used to issue future payments.
The Javascript handling the Stripe Elements iframe and the Javascript fetch method looks like this in my project:
```js
<script charset="utf-8">
var stripe = Stripe('<%= Rails.configuration.stripe[:publishable_key] %>');
// load the fonts in
var fonts = [{
cssSrc: "https://fonts.googleapis.com/css?family=Karla",
}];
// styles for the stripe inputs
var styles = {
base: {
color: "#32325D",
fontWeight: 500,
fontFamily: "Inter, Open Sans, Segoe UI, sans-serif",
fontSize: "16px",
fontSmoothing: "antialiased",
"::placeholder": {
color: "#CFD7DF"
}
},
invalid: {
color: "#E25950"
},
}
var elements = stripe.elements();
var cardElement = elements.create('card', {
style: styles,
hidePostalCode: true,
});
cardElement.mount('#example4-card');
const form = document.querySelector('#new_donation');
let donationType = '<%= donation_type %>'
let donationAmount = 0;
form.addEventListener('submit', function(e) {
var formClass = '.example4';// + exampleName;
var example = document.querySelector(formClass);
example.classList.add('submitting');
// Get donation amount from form or params
if (donationType == 'one_time') {
const donationInputAmount = document.querySelector('#donation_input_amount').value;
donationAmount = donationInputAmount;
} else {
donationAmount = '<%= subscription_donation_amount %>';
}
e.preventDefault();
// Step 1: POST request to create payment intent
fetch('/payment_intents', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
authenticity_token: '<%= form_authenticity_token %>',
payment_intent: {
status: "paid",
donation_type: '<%= donation_type %>',
amount: donationAmount,
}
}),
})
.then((response) => response.json())
.then((paymentIntent) => {
// Step 2: Create payment method and confirm payment intent.
stripe.confirmCardPayment(
paymentIntent.client_secret, {
payment_method: {
card: cardElement
}
}
).then((resp) => {
if(resp.error) {
alert(resp.error.message);
} else {
// Step 3: Embed payment ID in form
const paymentIdInput = document.querySelector('#payment');
paymentIdInput.value = paymentIntent.id;
// Embed payment amount
const donationOutputAmount = document.querySelector('#donation_amount');
donationOutputAmount.value = donationAmount;
example.classList.remove('submitting');
example.classList.add('submitted');
setTimeout(form.submit(), 3500);
}
})
})
.catch((error) => {
console.error('Error:', error);
});
});
</script>
```
To see the entire Rails view file go here: [https://github.com/gperilli/fundme/blob/master/app/views/donations/new.html.erb](https://github.com/gperilli/fundme/blob/master/app/views/donations/new.html.erb)
As you can see this is server side rendered Javascript with Ruby variables being pasted into the Javascript - the first time I had ever done something like this. I would normally avoid mixing two coding languages like this, but in this case I have coded it pretty quickly, and everything is in one Rails view file with no html - js file separation.
Setting up Stripe within the Rails project is as simple as installing the gem, creating an account with Stripe, and then putting the public and private keys in a `.env` file. My keys are held in my `.env` file, and set in the `config/initializers/stripe.rb` file.
So, they look like this:
```
PUBLISHABLE_KEY='pk_test_********'
SECRET_KEY='sk_test_********'
```
```rb
Rails.configuration.stripe = {
:publishable_key => ENV['PUBLISHABLE_KEY'],
:secret_key => ENV['SECRET_KEY']
}
Stripe.api_key = Rails.configuration.stripe[:secret_key]
```
Please note the `pk_test_ `and `sk_test_` which stand for the test vesrions of the Stripe public key and secret key which you can get from your Stripe account. By using these in development you can test dummy payments using test credit card numbers such as `4444 4444 4444 4444`. The `pk_live_ `and `sk_live_` versions should only be used in production environments.
The Javascript handling my payment form page also deals with the styling of the Stripe payment iframe sitting within my payment form:
```js
var styles = {
base: {
color: "#32325D",
fontWeight: 500,
fontFamily: "Inter, Open Sans, Segoe UI, sans-serif",
fontSize: "16px",
fontSmoothing: "antialiased",
"::placeholder": {
color: "#CFD7DF"
}
},
invalid: {
color: "#E25950"
},
}
```
For more information on styling see this: [https://stripe.com/docs/js/appendix/style](https://stripe.com/docs/js/appendix/style).
Stripe provide some ready-made payment forms whih are worth checking out here: [https://stripe.dev/elements-examples/](https://stripe.dev/elements-examples/). These also have processing animations which are quite useful.
So, from this you can see that an email input can be omitted by simply not including the Stripe address element. Also worth noting here is the use of the Stripe card element which has more recently been superceded by the Stripe payment element.
## Setting Up Subscription Payments Using Delayed Jobs in Rails with Sidekiq and Redis
The next major step I had in this project was creating an automated subscription feature. In terms of an engineering feet, time keeping and computing is quite interesting but I’ll probably never have to deal with that depth of engineering. However if you think about this for a second, any web service with a large number of subscribed users depends on a time keeping technology that can trigger code after a set interval. I can only imagine that the time keeping part of the code needs to stay on, all the time…and if it doesn’t, stuff breaks.
My initial thought as a programmer was: how can I mitigate against a situation when my subscription timers fail? And this problem still remains in my mind. If my web app needs to be restarted in the event of a serious issue, how can I fix this? Well, the only solution to this, I think, is to write recovery code that would look through all the users with a subscription and then calculate the next payment date based on the last - what a pain.
OK, so setting that potential issue aside for now, background or scheduled jobs in Rails need something like Sidekiq to handle the timing. In the [Rails guides](https://guides.rubyonrails.org/active_job_basics.html) Sidekiq and others are called 3rd-party queuing libraries. Sidekiq needs to be installed as a gem and then run alongside the Rails server in order for Rails to execute timed events.
Currently, on my Ubuntu command line I use this to start up Sidekiq:
```
bundle exec sidekiq
```
This outputs this to the terminal, and after this the enqueued execution logs get printed below:
```
m,
`$b
.ss, $$: .,d$
`$$P,d$P' .,md$P"'
,$$$$$b/md$$$P^'
.d$$$$$$/$$$P'
$$^' `"/$$$' ____ _ _ _ _
$: ,$$: / ___|(_) __| | ___| | _(_) __ _
`b :$$ \___ \| |/ _` |/ _ \ |/ / |/ _` |
$$: ___) | | (_| | __/ <| | (_| |
$$ |____/|_|\__,_|\___|_|\_\_|\__, |
.d$$ |_|
```
Lovely!
Rails jobs can be generated from the command line using:
```
rails generate job job_name
```
These will then appear in the jobs directory. From within the Rails framework, the source code or the Rails console, the job can be executed using `perform_now `or `perform_later`. The perform later will execute a Rails job after the specified interval.
In my app an automated payment job is executed after a monthly interval, incrementing the number of subscription payments by one each time until the maximum of 12 payments is reached. (In the code `monthly_subscription_term `is 12.) Upon reaching the maximum number of subscription payments - 12 - the user is unsubscribed. In order for this to work I created a callback function, `trigger_next_subscription_donation `on my `Donation `model which is executed if the user makes a payment (automated or otherwise). The callback function determines if a user should still be subscribed or not and then executes a delayed payment using the `Donation `instance of the payment that was just made: `ChargeSubscriberJob.set(wait: month_wait_time).perform_later(self)`. The self in that line is the Donation instance that is being passed to thr Rails job to generate the next automated payment.
```rb
def trigger_next_subscription_donation
return unless subscription_id.present?
this_subscription = Subscription.find_by!(id: subscription_id)
if donation_type == 'monthly_subscription' || donation_type == 'automated'
subscription_stage = user.subscription_stage + 1
if subscription_stage < this_subscription.monthly_subscription_term + 1
user.update_attribute(:subscription_stage, subscription_stage)
month_wait_time = Rails.env.development? ? 1.minute : 1.month
ChargeSubscriberJob.set(wait: month_wait_time).perform_later(self)
elsif subscription_stage == this_subscription.monthly_subscription_term + 1
# Stop Monthly Subscription
user.update_attribute(:subscribed, false)
user.update_attribute(:subscription_stage, 1)
user.update_attribute(:subscription_frequency, '')
user.donations.all.each do |donation|
donation.update_attribute(:subscription_status, 'completed') if donation.subscription_status == 'active'
end
this_subscription.update_attribute(:status, 'completed')
end
elsif donation_type == 'yearly_subscription'
# Stop Yearly Subscription
year_wait_time = Rails.env.development? ? this_subscription.monthly_subscription_term.minutes : this_subscription.monthly_subscription_term.months
EndYearlySubscriptionJob.set(wait: year_wait_time).perform_later(self)
end
end
```
You can also see here that I’m using `month_wait_time = Rails.env.development? ? 1.minute : 1.month` because actually testing a month long interval is not feasible in the development environment. To see the entire Donation model, go here:
So that’s how a fairly simple subscription payment system was created. The last step in actually getting this to work in deployment is using [Redis](https://redis.io/), an often extra paid-for service in heroku for example, that is providing data storage for Sidekiq. At this point in terms of the coding there is little more to say about Redis apart from the fact that it needs to be used as gem within the Rails framework, and configured as the Sidkiq adapter in whatever deployment you are using. | gperilli |
1,914,020 | Efficient Techniques for Chunking Arrays in JavaScript: A Performance Comparison | Chunking an array means splitting it into smaller arrays of a specified size. This technique is... | 0 | 2024-07-06T18:46:00 | https://dev.to/hallowshaw/efficient-techniques-for-chunking-arrays-in-javascript-a-performance-comparison-3k2 | javascript, webdev, tutorial, learning | Chunking an array means splitting it into smaller arrays of a specified size. This technique is useful for data processing, pagination, and more. In this blog, we'll explore four methods to chunk an array and compare their performance.
**Initial Setup:**
First, let's create an array of numbers from 1 to 10:
```
const arr = Array.from({ length: 10 }, (_, i) => i + 1);
```
Array.from() is used to generate an array with elements from 1 to 10. Now, we'll look at four ways to chunk this array.
## Method 1: Using a For Loop
```
function chunkArr(arr, size) {
let res = [];
for (let i = 0; i < arr.length; i += size) {
res.push(arr.slice(i, size + i));
}
return res;
}
console.time("for");
console.log(chunkArr(arr, 2));
console.timeEnd("for");
```
`Output:`
```
[ [ 1, 2 ], [ 3, 4 ], [ 5, 6 ], [ 7, 8 ], [ 9, 10 ] ]
for: 4.363ms
```
**Explanation:**
This function iterates through the array in steps of the specified chunk size. It slices the array at each step and adds the resulting sub-array to the result array (res). The performance measurement shows it took about 4.363 milliseconds.
**Detailed Breakdown:**
- Initialization: A result array res is initialized to hold the chunks.
- Looping: A for loop iterates over the array with a step size equal to the chunk size.
- Slicing: Within each iteration, a sub-array is created using slice and added to res.
- Return: After the loop completes, the function returns the result array containing all chunks.
---
## Method 2: Using Array.reduce()
```
function chunkArr2(arr, size) {
if (size <= 0) throw new Error('Chunk size must be a positive integer');
return arr.reduce((acc, _, i) => {
if (i % size === 0) acc.push(arr.slice(i, i + size));
return acc;
}, []);
}
console.time("reduce");
console.log(chunkArr2(arr, 2));
console.timeEnd("reduce");
```
`Output:`
```
[ [ 1, 2 ], [ 3, 4 ], [ 5, 6 ], [ 7, 8 ], [ 9, 10 ] ]
reduce: 0.069ms
```
**Explanation:**
Here Array.reduce() is used to build the chunked array. It checks if the current index is a multiple of the chunk size and slices the array accordingly. This method is significantly faster, taking only about 0.069 milliseconds.
**Detailed Breakdown:**
- Validation: The function checks if the chunk size is valid.
- Reducer Function: The reduce method iterates over the array. For each element, it checks if the index is a multiple of the chunk size.
- Slicing: When the index is a multiple of the chunk size, it slices the array and pushes the sub-array into the accumulator.
- Return: The accumulator containing the chunked arrays is returned.
---
## Method 3: Using Array.splice()
```
let [list, chunkSize] = [arr, 2];
console.time('splice');
list = [...Array(Math.ceil(list.length / chunkSize))].map(_ => list.splice(0, chunkSize));
console.timeEnd('splice');
console.log(list);
```
`Output:`
```
[ [ 1, 2 ], [ 3, 4 ], [ 5, 6 ], [ 7, 8 ], [ 9, 10 ] ]
splice: 0.048ms
```
**Explanation:**
This approach uses Array.splice() in combination with Array.map() to chunk the array. It creates a new array with the required number of chunks and uses splice() to remove and collect chunks from the original array. This method is also very fast, taking about 0.048 milliseconds.
**Detailed Breakdown:**
- Initialization: Create an array with the number of chunks needed.
- Mapping: Use map to iterate over the new array.
- Splicing: Within each iteration, use splice to remove and collect chunks from the original array.
- Return: The resulting array of chunks is returned.
---
## Method 4: Recursive Approach
```
const chunk = function(array, size) {
if (!array.length) {
return [];
}
const head = array.slice(0, size);
const tail = array.slice(size);
return [head, ...chunk(tail, size)];
};
console.time('recursive');
console.log(chunk(arr, 2));
console.timeEnd('recursive');
```
`Output:`
```
[ [ 1, 2 ], [ 3, 4 ], [ 5, 6 ], [ 7, 8 ], [ 9, 10 ] ]
recursive: 4.372ms
```
**Explanation:**
This recursive method splits the array into the first chunk (head) and the remaining elements (tail). It then recursively processes the tail, concatenating the results. While more elegant, this method is slower than the reduce and splice methods, taking about 4.372 milliseconds.
**Detailed Breakdown:**
- Base Case: If the array is empty, return an empty array.
- Slicing: Split the array into the head (first chunk) and the tail (remaining elements).
- Recursion: Recursively process the tail and concatenate the results with the head.
- Return: The concatenated result is returned.
---
**All four methods successfully chunk the array into sub-arrays of the specified size. However, their performance varies significantly:**
- For Loop: 4.363ms
- Reduce: 0.069ms
- Splice: 0.048ms
- Recursive: 4.372ms
**The splice and reduce methods are the fastest, making them preferable for performance-critical applications. While functional, the for loop and recursive methods are slower and might be less suitable for large datasets.**
## Recommendations
- Performance: For optimal performance, use the splice or reduce methods.
- Readability: The recursive method offers more readability and elegance, but at the cost of performance.
- Flexibility: The for loop method is straightforward and easy to understand, suitable for simple use cases.
Thank you for reading! | hallowshaw |
1,914,019 | Evolve Your Machine Learning: Automate the Process of Model Selection through TPOT. | One day, I google for optimizing my machine learning projects and I came across the TPOT library.... | 0 | 2024-07-06T18:45:10 | https://dev.to/yuval728/evolve-your-machine-learning-automate-the-process-of-model-selection-through-tpot-4445 | programming, machinelearning, python, ai | One day, I google for optimizing my machine learning projects and I came across the TPOT library. Based on the genetic algorithms, TPOT stands for Tree-based Pipeline Optimization Tool, is an automatic way to select the model and tune hyperparameters. More information regarding TPOT, its features and a step by step guide on how to use TPOT to automate your machine learning process shall be discussed in this blog.
**What is TPOT?**
TPOT is a Python library that utilizes genetic programming to optimize the pipeline of machine learning. It deals with two problems that are otherwise time-consuming, that is; model selection and hyperparameter tuning so that the data scientists can find better solutions to ostensibly problematic tasks. TPOT has several models to choose from and the hyperparameters of the models are dynamically optimised with new best pipelines being incorporated.
**Key Features of TPOT**
Automation: TPOT optimizes the selection of models and the tuning of the hyperparameters of the chosen models themselves.
Genetic Programming: Uses genetic algorithms to solve the problem of the evolution of machine learning pipelines.
Scikit-Learn Compatibility: TPOT is designed to be highly flexible, is implemented in Python, and leverages scikit-learn which should integrate well into most pipelines.
Customizability: Users can can also set their personalized operators and pipeline settings.
**How TPOT Works**
In the case of TPOT, it applies genetic programming so as to evolve the machine learning pipelines. Starting with a set of random pipelines and then using selection, crossover, and mutation, it improves the pipelines. The fitness function is a key element of the process since it provides assessment of the pipelines’ performance.
**Getting Started with TPOT**
Now let us consider the steps of setting up TPOT as the tool to automate the most of the ML processes.
**Step 1**: Installing TPOT
You can install TPOT using pip:
```
pip install tpot
```
**Step 2**: Importing Necessary Libraries
Once installed, you can import TPOT and other necessary libraries.
```
import pandas as pd
import numpy as np
from sklearn.model_selection import train_test_split
from tpot import TPOTClassifier
```
**Step 3**: Loading and Preparing Data
I am using gamma-telescope data which I found in Kaggle datasets
```
telescope=pd.read_csv('/kaggle/input/magic-gamma-telescope-dataset/telescope_data.csv')
telescope.drop(telescope.columns[0],axis=1,inplace=True)
telescope.head()
```
```
telescope_shuffle=telescope.iloc[np.random.permutation(len(telescope))]
telescope=telescope_shuffle.reset_index(drop=True)
telescope['class']=telescope['class'].map({'g':0,'h':1})
```
**Step 4**: Configuring and Running TPOT
Configure the TPOT classifier and fit it.
```
tele_class = telescope['class'].values
tele_features = telescope.drop('class',axis=1).values
training_data, testing_data, training_classes, testing_classes = train_test_split(tele_features, tele_class, test_size=0.25, random_state=42, stratify=tele_class)
```
```
tpot = TPOTClassifier(generations=5,verbosity=2)
tpot.fit(training_data, training_classes)
```
**Step 5**: Evaluating the Best Pipeline
```
tpot.score(testing_data, testing_classes)
```
**Step 6**: Understanding the Output
The export function saves the best pipeline as a Python script
```
import os
os.makedirs('Output',exist_ok=True)
tpot.export('Output/tpot_pipeline.py')
```
Output file (tpot_pipeline.py):
```
import numpy as np
import pandas as pd
from sklearn.model_selection import train_test_split
from sklearn.neural_network import MLPClassifier
from sklearn.pipeline import make_pipeline
from sklearn.preprocessing import RobustScaler
from tpot.builtins import ZeroCount
# NOTE: Make sure that the outcome column is labeled 'target' in the data file
tpot_data = pd.read_csv('PATH/TO/DATA/FILE', sep='COLUMN_SEPARATOR', dtype=np.float64)
features = tpot_data.drop('target', axis=1)
training_features, testing_features, training_target, testing_target = \
train_test_split(features, tpot_data['target'], random_state=None)
# Average CV score on the training set was: 0.8779530318962496
exported_pipeline = make_pipeline(
ZeroCount(),
RobustScaler(),
MLPClassifier(alpha=0.001, learning_rate_init=0.01)
)
exported_pipeline.fit(training_features, training_target)
results = exported_pipeline.predict(testing_features)
```
**Conclusion**
TPOT is a significant tool based on the application of genetic algorithms, which helps to solve the task of automatic finding of the optimal structure of the machine learning pipeline. Therefore, by automating the process by bringing TPOT into your development environment, you can cut out the time devoted to model selection or fine-tuning of hyperparameters in favor of more intricate operations of your tasks.
**Resources:**
[TPOT Documentation](https://github.com/EpistasisLab/tpot)
[Genetic Programming](https://en.wikipedia.org/wiki/Genetic_programming)
| yuval728 |
1,914,017 | Let’s Build Market Analysis Team with AI Agents | Witness Building of Your 24/7 Expert Market Analysis Team Full Article What's This Article About? ○... | 0 | 2024-07-06T18:38:20 | https://dev.to/exploredataaiml/lets-build-market-analysis-team-with-ai-agents-iee | genai, llm, rag, ai | Witness Building of Your 24/7 Expert Market Analysis Team
[Full Article] (https://medium.com/@learn-simplified/lets-build-market-analysis-team-with-ai-agents-8dbe3fec7c9d)
What's This Article About?
○ This article is about creating an AI-Agents powered tool for market analysis.
○ It uses multiple AI agents, each with a specific job like financial analyst or research analyst.
○ The tool can give detailed information about any company when you type in its name.
○ It explains how the system is built, including the computer programs used and how different parts work together.
Why Read This Article?
○ It shows how AI can be used to do complex market analysis quickly.
○ It gives insights into how AI can process large amounts of financial data. ○ The article explains how AI can provide detailed analysis by combining different viewpoints.
○ It's useful for business leaders, investors, and tech experts to understand how AI can help make important decisions.
Let's Design
○ The tool uses four AI agents: Financial Analyst, Market Research, Investment Consultant, and Final Report.
○ Each agent has a specific job to cover different parts of market analysis.
○ A central system makes sure all the agents work well together.
○ Users can easily input their questions and get detailed answers.
Our Project Structure
○ Main Module: This part creates the user interface and manages how the analysis is done.
○ TeeLogger: This helps in recording what the program does.
○ MarketAnalysis: This organizes how different AI agents work together.
○ Other functions: These help run the analysis, update the display, and show results to users.
Agents (Market Observers)
○ This part explains how different AI agents are set up, each with special tools for their job.
AI Agents (Employee) Goals
○ This section describes how tasks are set up for the AI agents using a file that's easy to change.
Detailed Orientation for our AI Employees (Config)
○ This part shows the detailed instructions given to each AI agent for their specific tasks.
Closing Thoughts
○ The article ends by discussing how AI might change business in the future. ○ It mentions possible future developments like AI managing investments or giving advice to executives.
○ It also talks about the importance of using AI responsibly and ethically.
| exploredataaiml |
1,914,016 | WW88 | Thông tin chi tiết: WW88 là địa chỉ chính thức của thương hiệu cá cược trực tuyến uy tín bậc nhất tại... | 0 | 2024-07-06T18:35:09 | https://dev.to/ww88_1/ww88-5h8f | Thông tin chi tiết: WW88 là địa chỉ chính thức của thương hiệu cá cược trực tuyến uy tín bậc nhất tại Việt Nam. Chúng tôi cung cấp link đăng ký để nhận phần quà 128k ngay lần đăng nhập đầu tiên.
Website: https://54.199.220.250/
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Phone: 0876585744
Email: [email protected]
Zipcode: 100000
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https://54.199.220.250/
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https://pixabay.com/users/ww88_1-44811715/ | ww88_1 |
|
1,914,000 | Upgrade Your Look with the Black on Black Bucket Hat | Accessories are the finishing touch that can elevate any outfit from ordinary to outstanding.... | 0 | 2024-07-06T18:16:18 | https://dev.to/priority_souls_3643ca1559/upgrade-your-look-with-the-black-on-black-bucket-hat-2nb3 | fashionforward | Accessories are the finishing touch that can elevate any outfit from ordinary to outstanding. Introducing our Black on [Black Bucket Hat]**(https://www.prioritysouls.com/products/the-bucket?pr_prod_strat=e5_desc&pr_rec_id=bd4fd87dc&pr_rec_pid=9095609221433&pr_ref_pid=9187841605945&pr_seq=uniform)**, priced at $30.00, a versatile accessory designed to enhance your style with its timeless appeal.
**Sleek and Sophisticated Design**
The all-black aesthetic of our Bucket Hat exudes sophistication and pairs effortlessly with any ensemble. Whether you're dressing up for a casual outing or aiming for a streetwear-inspired look, this hat adds a touch of sleekness to your wardrobe.
**Comfort Meets Style**
Crafted with comfort in mind, our Bucket Hat ensures a snug fit that complements your personal style. Its design not only enhances your appearance but also keeps you comfortable throughout the day.
**Durable Quality**
Made from high-quality materials, this hat is built to last. Its resilience ensures it stands the test of time, making it a reliable addition to your accessory collection.
**Versatile and Essential**
A true wardrobe staple, the Black on Black Bucket Hat is perfect for various occasions. Whether you're lounging on the beach, enjoying a casual day out, or adding a distinctive touch to your streetwear ensemble, this hat is your go-to accessory.
**Modern Twist on Classic Style**
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**One Size Fits Most**
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**Elevate Your Accessory Game**
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Don't miss out on this essential piece. Embrace sophistication, comfort, and timeless style with our [Black on Black Bucket Hat]**(https://www.prioritysouls.com/products/the-bucket?pr_prod_strat=e5_desc&pr_rec_id=bd4fd87dc&pr_rec_pid=9095609221433&pr_ref_pid=9187841605945&pr_seq=uniform**).
| priority_souls_3643ca1559 |
1,913,999 | Building a CRUD Application with the MERN Stack: A Step-by-Step Guide | skipping boaring section 😁 1. Setting Up the Backend mkdir mern-todo-app cd... | 0 | 2024-07-06T18:14:14 | https://dev.to/muhammedshamal/building-a-crud-application-with-the-mern-stack-a-step-by-step-guide-5d16 | webdev, javascript, beginners, programming | skipping boaring section 😁
## 1. Setting Up the Backend
```
mkdir mern-todo-app
cd mern-todo-app
npm init -y
1.2. Install Dependencies
`npm install express mongoose body-parser cors
`
```
1.3. Set Up the Server
Create an index.js file to set up the Express server and connect to MongoDB.
```
// index.js
const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
const cors = require('cors');
const app = express();
const PORT = process.env.PORT || 5000;
mongoose.connect('mongodb://localhost:27017/todoapp', {
useNewUrlParser: true,
useUnifiedTopology: true,
});
const db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', () => {
console.log('Connected to MongoDB');
});
app.use(bodyParser.json());
app.use(cors());
app.listen(PORT, () => {
console.log(`Server is running on port ${PORT}`);
});
```
1.4. Create Mongoose Models
Create a models directory and define the Todo model.
```
// models/Todo.js
const mongoose = require('mongoose');
const todoSchema = new mongoose.Schema({
text: { type: String, required: true },
completed: { type: Boolean, default: false },
createdAt: { type: Date, default: Date.now },
});
const Todo = mongoose.model('Todo', todoSchema);
module.exports = Todo;
```
1.5. Create Routes
Create a routes directory and define the routes for the CRUD operations
```
// routes/todoRoutes.js
const express = require('express');
const Todo = require('../models/Todo');
const router = express.Router();
// Create a new todo
router.post('/', async (req, res) => {
try {
const todo = new Todo({
text: req.body.text,
});
await todo.save();
res.status(201).json(todo);
} catch (err) {
res.status(400).json({ error: err.message });
}
});
// Get all todos
router.get('/', async (req, res) => {
try {
const todos = await Todo.find();
res.status(200).json(todos);
} catch (err) {
res.status(400).json({ error: err.message });
}
});
// Update a todo
router.put('/:id', async (req, res) => {
try {
const todo = await Todo.findByIdAndUpdate(req.params.id, req.body, { new: true });
res.status(200).json(todo);
} catch (err) {
res.status(400).json({ error: err.message });
}
});
// Delete a todo
router.delete('/:id', async (req, res) => {
try {
await Todo.findByIdAndDelete(req.params.id);
res.status(200).json({ message: 'Todo deleted successfully' });
} catch (err) {
res.status(400).json({ error: err.message });
}
});
module.exports = router;
```
> Integrate the routes into the index.js file.
`// index.js
const todoRoutes = require('./routes/todoRoutes');
app.use('/api/todos', todoRoutes);
`
## 2. Setting Up the Frontend
2.1. Initialize the React Project
Create a new React project using Create React App.
```
npx create-react-app client
cd client
```
2.2. Install Dependencies
Install Axios for making HTTP requests.
```
npm install axios
```
2.3. Create Components
Create a components directory and add the following components: TodoList, TodoItem, and TodoForm.
TodoList Component
```
// src/components/TodoList.js
import React, { useEffect, useState } from 'react';
import axios from 'axios';
import TodoItem from './TodoItem';
import TodoForm from './TodoForm';
const TodoList = () => {
const [todos, setTodos] = useState([]);
useEffect(() => {
fetchTodos();
}, []);
const fetchTodos = async () => {
const response = await axios.get('http://localhost:5000/api/todos');
setTodos(response.data);
};
const addTodo = async (text) => {
const response = await axios.post('http://localhost:5000/api/todos', { text });
setTodos([...todos, response.data]);
};
const updateTodo = async (id, updatedTodo) => {
const response = await axios.put(`http://localhost:5000/api/todos/${id}`, updatedTodo);
setTodos(todos.map(todo => (todo._id === id ? response.data : todo)));
};
const deleteTodo = async (id) => {
await axios.delete(`http://localhost:5000/api/todos/${id}`);
setTodos(todos.filter(todo => todo._id !== id));
};
return (
<div>
<h1>Todo List</h1>
<TodoForm addTodo={addTodo} />
{todos.map(todo => (
<TodoItem
key={todo._id}
todo={todo}
updateTodo={updateTodo}
deleteTodo={deleteTodo}
/>
))}
</div>
);
};
export default TodoList;
```
TodoItem Component
```
// src/components/TodoItem.js
import React from 'react';
const TodoItem = ({ todo, updateTodo, deleteTodo }) => {
const toggleComplete = () => {
updateTodo(todo._id, { ...todo, completed: !todo.completed });
};
return (
<div>
<input
type="checkbox"
checked={todo.completed}
onChange={toggleComplete}
/>
<span style={{ textDecoration: todo.completed ? 'line-through' : 'none' }}>
{todo.text}
</span>
<button onClick={() => deleteTodo(todo._id)}>Delete</button>
</div>
);
};
export default TodoItem;
```
TodoFormComponent
```
// src/components/TodoForm.js
import React, { useState } from 'react';
const TodoForm = ({ addTodo }) => {
const [text, setText] = useState('');
const handleSubmit = (e) => {
e.preventDefault();
addTodo(text);
setText('');
};
return (
<form onSubmit={handleSubmit}>
<input
type="text"
value={text}
onChange={(e) => setText(e.target.value)}
placeholder="Add a new todo"
/>
<button type="submit">Add</button>
</form>
);
};
export default TodoForm;
```
2.4. Integrate Components in App
Update the App.js file to include the TodoList component.
```
// src/App.js
import React from 'react';
import TodoList from './components/TodoList';
function App() {
return (
<div className="App">
<TodoList />
</div>
);
}
export default App;
```
2.5. Run the Application
Start the backend server and the React frontend.
`# In the root directory
node index.js
# In the client directory
npm start
`
| muhammedshamal |
1,913,998 | Order cheap website design | Ordering the cheap website design of Fars IT Group will help you to start an internet business at an... | 0 | 2024-07-06T18:09:23 | https://dev.to/sthn21_hossein_cd9a56e2e8/order-cheap-website-design-11d9 | [Ordering the cheap website design](https://it-fars.com/economic-website-design
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|
1,913,994 | Destructuring Assignment: Unleashing the Power of Simplicity | What a great topic! Destructuring assignment is a syntax feature in JavaScript that allows you to... | 0 | 2024-07-06T18:07:02 | https://dev.to/waelhabbal/destructuring-assignment-unleashing-the-power-of-simplicity-21ol | javascript, webdev, destructuringassignment | What a great topic!
Destructuring assignment is a syntax feature in JavaScript that allows you to unpack values from arrays, objects, or strings into distinct variables. It's a concise and expressive way to assign values to multiple variables at once. In this response, I'll cover the basics, provide examples, and demonstrate its various uses in JavaScript.
**Basic syntax**
The basic syntax for destructuring assignment is:
```
let [var1, var2, ...] = expression;
```
Or:
```
let {prop1: var1, prop2: var2, ...} = object;
```
Or:
```
let {prop: var1, ...rest} = object;
```
**Array destructuring**
You can extract values from an array using array destructuring:
```javascript
const colors = ['red', 'green', 'blue'];
let [red, green, blue] = colors;
console.log(red); // Output: "red"
console.log(green); // Output: "green"
console.log(blue); // Output: "blue"
```
**Object destructuring**
You can extract properties from an object using object destructuring:
```javascript
const person = { name: 'John', age: 30 };
let { name, age } = person;
console.log(name); // Output: "John"
console.log(age); // Output: 30
```
**Default values**
You can provide default values for variables that might not be present in the original data:
```javascript
const person = { name: 'John' };
let { name = 'Unknown', age } = person;
console.log(name); // Output: "John"
console.log(age); // Output: undefined
```
**Rest pattern**
The rest pattern allows you to capture the remaining elements or properties into an array or object:
```javascript
const colors = ['red', 'green', 'blue', 'yellow'];
let [red, green, ...others] = colors;
console.log(others); // Output: ["blue", "yellow"]
```
```javascript
const person = { name: 'John', age: 30, address: { street: '123 Main St' } };
let { name, age, address: { street } } = person;
console.log(street); // Output: "123 Main St"
```
**Using destructuring with functions**
You can use destructuring as function parameters to extract values from the arguments:
```javascript
function getPersonData({ name, age }) {
console.log(`Name: ${name}, Age: ${age}`);
}
const person = { name: 'John', age: 30 };
getPersonData(person);
// Output: Name: John, Age: 30
```
**Using destructuring with imports**
You can use destructuring with imports to extract specific modules or functions from a namespace:
```javascript
import { add, multiply } from './math';
console.log(add(2, 3)); // Output: 5
console.log(multiply(2, 3)); // Output: 6
```
**Real-world samples**
1. **Fetching data from an API**: Use destructuring to extract specific data from the response:
```javascript
fetch('https://api.example.com/data')
.then(response => response.json())
.then(data => {
let { id, name } = data;
console.log(`ID: ${id}, Name: ${name}`);
});
```
2. **Parsing JSON data**: Use destructuring to extract specific fields from a JSON object:
```javascript
const jsonData = '{"name": "John", "age": 30}';
const obj = JSON.parse(jsonData);
let { name, age } = obj;
console.log(`Name: ${name}, Age: ${age}`);
```
3. **Working with nested objects**: Use destructuring to extract specific properties from nested objects:
```javascript
const complexObject = {
nestedObject: {
property1: 'value1',
property2: 'value2'
}
};
let { nestedObject: { property1, property2 } } = complexObject;
console.log(property1); // Output: "value1"
console.log(property2); // Output: "value2"
```
4. **Deconstructing arrays of objects**: Use destructuring to extract specific properties from an array of objects:
```javascript
const people = [
{ name: 'John', age: 30 },
{ name: 'Jane', age: 25 }
];
let [{ name }, { age }] = people;
console.log(name); // Output: "John"
console.log(age); // Output: 30
```
These are just a few examples of the many ways you can use destructuring in JavaScript. With practice and creativity, you can unlock its full potential and write more concise and expressive code! | waelhabbal |
1,913,988 | Conventional Commits | Hoje vou falar um pouco sobre a importância dos Conventional Commits (e Gitmojis!) 💻✨ Commits... | 0 | 2024-07-06T17:50:52 | https://dev.to/ericarodrigs/conventional-commits-8mh | conventionalcommits, gitmojis, programming, softwaredevelopment | #
Hoje vou falar um pouco sobre a importância dos *Conventional Commits* (e *Gitmojis*!) 💻✨
Commits padronizados são essenciais para manter a qualidade e a organização do código-fonte de um projeto. A comunidade em geral recomenda seguir padrões como os *Conventional Commits*, que especificam um formato claro para as mensagens de commit, como "tipo(scope): mensagem", onde o tipo indica o propósito do commit (ex: feat para novas funcionalidades, fix para correções de bugs) e o escopo opcional descreve a parte do código alterada.
É crucial que as mensagens sejam sucintas e claras, destacando de forma resumida o que foi feito em cada commit. Isso não só melhora a compreensão do histórico do projeto, mas também facilita a colaboração entre os membros da equipe, por exemplo tornando mais fluido o processo de code review.
Usar *Conventional Commits* ajuda a padronizar as mensagens de commit, facilitando a compreensão do histórico do projeto e automatizando tarefas como geração de changelogs. Se você ainda não conhece, recomendo dar uma olhada neste guia essencial: [Conventional Commits Guide](https://www.conventionalcommits.org/en/v1.0.0/).
Além disso, também costumo usar *Gitmojis* no início dos commits. Acho que traz uma dose extra de clareza e diversão ao nosso trabalho diário. 🎉 Para quem não sabe, os Gitmojis são emojis usados para descrever o propósito de um commit de forma visual, como uma pequena ilustração do que foi feito. Vou deixar um [link](https://gitmoji.dev/) da página que uso como referência🌟
✨ Dica de ouro: para facilitar ainda mais o uso de *Conventional Commits*, eu utilizo uma extensão no VSCode chamada *Conventional Commits*. Ela simplifica o processo e ajuda a manter a consistência nas mensagens de commit. Com certeza existe uma extensão parecida se você usa outra IDE para codar.
Vamos juntos melhorar nossos fluxos de trabalho e comunicação no desenvolvimento de software! 💪🌐 | ericarodrigs |
1,913,996 | Building Full-Stack Applications with the MERN Stack: A Comprehensive Guide | Introduction Introduce the MERN stack, its components, and why it’s a popular choice for full-stack... | 0 | 2024-07-06T18:05:23 | https://dev.to/muhammedshamal/building-full-stack-applications-with-the-mern-stack-a-comprehensive-guide-4g6h | javascript, webdev, beginners, programming | Introduction
Introduce the MERN stack, its components, and why it’s a popular choice for full-stack web development.
1. What is the MERN Stack?
Definition: Explain that MERN stands for MongoDB, Express.js, React, and Node.js.
Purpose: Highlight the benefits of using the MERN stack, such as using JavaScript end-to-end and the synergy between its components.
Use Cases: Mention common use cases such as single-page applications (SPAs), real-time applications, and CRUD applications.
> Guys am not dealing with each ones, because already given before in depth details.
2. Integrating the MERN Stack
Connecting the Components:
Backend Setup: Show how to set up the backend with Node.js, Express.js, and MongoDB.
Frontend Setup: Guide on integrating the React frontend with the Express backend.
API Communication:
Creating RESTful APIs: Show how to create and consume APIs using Express and React.
Fetching Data: Provide examples of fetching data from the backend using Axios or Fetch API in React.
And frients here am providing "CRUD" operation code link to refer & learn;
[CRUD using MERN](https://dev.to/muhammedshamal/building-a-crud-application-with-the-mern-stack-a-step-by-step-guide-5d16)
By, happy coding!
| muhammedshamal |
1,913,995 | WebNUT: Integrate UPS into the SmartHome | Learn how to install and configure WebNUT in Docker and integrate it into HomeAssistant to monitor... | 0 | 2024-07-06T18:02:35 | https://blog.disane.dev/en/webnut-integrate-ups-into-the-smarthome/ | smarthome, usv, homeassistant, docker | Learn how to install and configure WebNUT in Docker and integrate it into HomeAssistant to monitor your UPS devices in your smart home. 🏠
---
In this article, I will show you how to install and configure WebNUT in Docker and then integrate it into HomeAssistant. WebNUT is a web interface for Network UPS Tools (NUT) that allows you to monitor UPS devices (uninterruptible power supplies) in your network. The integration with HomeAssistant allows you to integrate the UPS data directly into your smart home system, giving you even more control and overview.
## What is WebNUT and why should you use it? 🤔
WebNUT is a practical tool for anyone who has a UPS in their network. With WebNUT, you can:
* Monitor the status of your UPS in real time.
* Receive alerts and notifications in the event of power outages or other problems.
* Have centralized management for multiple UPSs.
Through integration with HomeAssistant, you can also create automated actions based on UPS status, such as shutting down devices during power outages or sending notifications.
## Preparation: What you need 🛠️
Before we get started, make sure you have the following things:
* A Docker-enabled server (e.g. a Raspberry Pi or a Raspberry Pi).e.g. a Raspberry Pi or a NAS)
* An installed and working Docker environment.
* HomeAssistant (already installed and configured).
## Install WebNUT in Docker 🐳
### Step 1: Create a Docker container for WebNUT
Create a new Docker container for WebNUT. To do this, open a terminal and execute the following command:
```bash
docker run -d \
--name=webnut \
-e TZ=Europe/Berlin \
-p 80:80 \
--restart unless-stopped \
--cap-add=NET_ADMIN \
christronyxyocum/webnut
```
This command starts a new Docker container for WebNUT with the necessary settings. Make sure that port 80 is available or adjust the port forwarding accordingly.
### Step 2: Configure WebNUT
After the container has started, you should edit the configuration file to add your UPS devices. You can find the configuration file under `/etc/nut/ups.conf`. You can enter the container and edit the file with an editor such as `nano`:
```bash
docker exec -it webnut /bin/bash
nano /etc/nut/ups.conf
```
Add the information about your UPS to the file, e.g.:
```ini
[myups]
driver = usbhid-ups
port = auto
desc = "My UPS"
```
Save the file and exit the editor. Restart the NUT service for the changes to take effect.
## Integrate WebNUT in HomeAssistant 🏠
### Step 1: Add NUT integration in HomeAssistant
Open your HomeAssistant instance and go to the integrations. Add a new integration and search for "Network UPS Tools (NUT)". Select it and configure it with the appropriate settings:
* Host: `IP address_your_WebNUT_container`
* Port: `3493`
* Username: `Your_NUT_username` (if configured)
* Password: `Your_NUT_password` (if configured)
### Step 2: Use WebNUT in HomeAssistant
After successful configuration, the UPS data should be available in HomeAssistant. You can now create sensors, notifications and automations based on the UPS status. Example of an automation:
```yaml
alias: 'Notification in case of power failure'
trigger:
- platform: state
entity_id: sensor.myups_status
to: 'OB Discharging'
action:
- service: notify.notify
data:
message: "Attention! Power failure detected. UPS is running on battery power."
```
## Conclusion 🎉
With WebNUT and Docker, you can monitor your UPS easily and effectively. Integration with HomeAssistant also gives you the opportunity to make your smart home even smarter by setting up automated actions based on the UPS status. Have fun setting it up and trying it out!
---
If you like my posts, it would be nice if you follow my [Blog](https://blog.disane.dev) for more tech stuff. | disane |
1,913,130 | Preview Your Images Instantly Before Uploading. | We all have used modern websites where you get the pleasure of previewing the image you have selected... | 0 | 2024-07-06T18:01:07 | https://dev.to/ghostaram/preview-your-images-instantly-before-uploading-194 | webdev, javascript, frontend, programming | We all have used modern websites where you get the pleasure of previewing the image you have selected for upload before you send it to the server. Image preview is such an interesting experience to have as user. You have seen this several times on social media. This is a common experience in most modern websites.
As upcoming developers, we only get to see the default behavior when uploading files, that is an ugly display of the name of the image file alongside an ugly button that says 'Choose a file'. Now are you eager to find out what magic the developers of your favorite social media sites perform to make you happy about your pictures before sending them to the rest of the world? Yes, and this article will show you how to preview images on your websites before uploading. Perhaps you can also make the users of your websites as happy as you always are.
## Writing the Markup code
Previewing files is a such an easy task that we can accomplish with just about four lines of code. Before we go deeper into the magic of previewing the image, let us write some simple HTML code for selecting an image from your computer.
```
<style>
*{
font-family: sans-serif;
}
body{
text-align: center;
padding-block-start: 4rem;
}
button{
background-color: #0369a1;
color: #f1f5f9;
border-radius: 4px;
padding-inline: 1rem;
padding-block: .5rem;
border: none;
}
button:hover{
opacity: .7;
transition: all .75s;
}
input{
display: none;
}
</style>
<body>
<h1>Preview Before Upload</h1>
<input type="file" name="imageFile">
<button>Select Image</button>
</body>
```
The code snippet above renders a heading, a HTML input element for a file and a button named 'Select Image'. We have also included some CSS styles to improve the look and feel.
In the styles we have set the display property for the input element to none. Another unusual thing we have done is adding a button called 'Select Image'. Wondering why we have done this? For one reason, the default file selection component has an ugly display graphic so we can hide it from display and use something easier to style as a button. Another reason why we have used the button is to trigger file selection dialog even if we do not have the input element on display. This means that the input element is only hidden from display but its very much active.
## Selecting the file
The next thing we want to do is to give the button the ability to open the file selection dialog when clicked. Guessed how we are going to open the file input dialog using the button. Yes, you are right - by attaching a click event listener to the button. Well, that's true but what are we going to ask the browser in the event handler? Under default display conditions, we would click the file input element manually to open a file selection dialog. In this case we are going to ask the browser to click the file input element when the button is clicked. Once the event handler is executed the file input dialog for will be opened for us. Sounds brilliant, like an automation task, doesn't it? Enough with the words, let's implement what we have just said.
```
<script>
const button = document.querySelector('button')
const fileInput = document.querySelector('input')
button.addEventListener('click', () =>{
fileInput.click()
})
</script>
```
That's it, we have instructed the browser to open the file input dialog when the 'Select Image' button is clicked. We click the button which has the click even handler. The click even handler clicks the input element. The input element opens the file selection dialog on for us. The screenshot below shows how the result would look like.
Right now if we select a file from the input dialog, we don't see anything on the screen. That sucks, let see how to preview the image in the next section.
## Displaying the Preview
Previewing an image on the client side requires one Browser API called the `FileReader`. The `FileReader` is provided readily to us by JavaSript. The `FileReader` allows us to asynchronously read content of a file in a way that can be displayed instantly. In the case of images, as data URL.
The task we have here is to tell the browser to load the fil and render it instantly after loading. How are we going to do this ? Have you ever heard of a `change` event? We can watch for the change event in the file input element, then do something when a file is selected.
Let's start small, addi a `change` event listener to the input element.
```
fileInput.addEventListener('change', (event) =>{
//Do something here
})
```
Next we will wait for the file to be loaded into the browser then get the image URL before trying to display it.
The code snippet below implements the task described above.
```
fileInput.addEventListener('change', (event) =>{
//Get the file from files array
const file = event.target.files[0]
if(file){
const fileReader = new FileReader()
//Set up event listener to the fileReader before begining to read
fileReader.onloadend = () => {
//Save the value read by the file reader in a variable
const imageSrc = fileReader.result
}
// Tell the fileReader to read this file as URL
fileReader.readAsDataURL(file)
}
})
```
We now have a URL (`imageSrc`) that we can use to render an image. To render an image we need an `<img>` element. We can create an image element using the `createElement` method of the `document` library. After creating the `<img>` element we can use it to display the image we have just loaded into the browser.
```
fileInput.addEventListener('change', (event) =>{
//Get the file from files array
const file = event.target.files[0]
if(file){
const fileReader = new FileReader()
fileReader.onloadend = () => {
const imageSrc = fileReader.result
// Create image element
const img = document.createElement('img')
// Assign value to the src attribute of the img element
img.src = imageSrc
// Add the image element to the body of the document
document.body.appendChild(img)
}
fileReader.readAsDataURL(file)
}
})
```
The code snippet added above enables us to preview before we can send it to the backend for storage. We created an image element,, assigned an image URL to it and rendered it. The image will be displayed instantly after selecting the file.
An example of what we meant to achieve looks like the following screenshot:
It looks like we have achieved what we wanted but we have a little problem. Have you tried selecting a second image? If you did then you must have realized that multiple images are displayed instead of the latest only. In this little experiment, we expect a new image to replace the existing image.
## Preventing multiple image renders.
The solution to rendering multiple images involves cleaning up the DOM every time we are rendering a new image. We clean up to ensure that there is no other image in the body of the document that we don't intend to display.
The following code snippet finds and removes an `<img>` element if it exists in the body of the document.
```
... //the rest of the change event handler code
fileReader.onloadend = () => {
//Save the value read by the file reader in a variable
const imageSrc = fileReader.result
//try to select the img tag
const existingImgElement = document.querySelector('img')
//Check if the tag is not null, it then remove it before rendering the next
if(existingImgElement){
document.body.removeChild(existingImgElement)
}
const img = document.createElement('img')
img.src = imageSrc
document.body.appendChild(img)
}
...//The rest of the change event handler code
```
In the above code snippet, we remove an `<img>` tag from the body of the document just before creating a new one. We check if the value of the existing image element is truthy to avoid potential errors. Removing the existing `<img>` tag from the body fixes the unintended rendering of multiple images.
Finally, we have successfully learned how to preview an image instantly before uploading. Such a little improvement on your web apps can do a lot good to the user experience on your web apps. Previewing an image before upload can be done using the `FileReader` API provided by JavaScript. A `loadend` event handler can be added the `FileReader` to to render the image after complete loading. The `FileReader` reads the image as a data URL. The result of the file reader can be assigned directly to the `src` attribute of the `img` tag to display the image instantly after selecting it. | ghostaram |
1,913,993 | WebNUT: USV ins SmartHome einbinden | Lerne, wie Du WebNUT in Docker installierst, konfigurierst und in HomeAssistant integrierst, um Deine... | 0 | 2024-07-06T18:00:14 | https://blog.disane.dev/webnut-usv-ins-smarthome-einbinden/ | smarthome, usv, homeassistant, docker | Lerne, wie Du WebNUT in Docker installierst, konfigurierst und in HomeAssistant integrierst, um Deine USV-Geräte im Smart Home zu überwachen. 🏠
---
In diesem Artikel zeige ich Dir, wie Du WebNUT in Docker installierst und konfigurierst und anschließend in HomeAssistant integrierst. WebNUT ist ein Webinterface für Network UPS Tools (NUT), das es Dir ermöglicht, USV-Geräte (unterbrechungsfreie Stromversorgungen) in Deinem Netzwerk zu überwachen. Die Integration in HomeAssistant erlaubt es Dir, die USV-Daten direkt in Dein Smart Home System einzubinden und so noch mehr Kontrolle und Übersicht zu gewinnen.
## Was ist WebNUT und warum solltest Du es nutzen? 🤔
WebNUT ist ein praktisches Tool für alle, die eine USV in ihrem Netzwerk haben. Mit WebNUT kannst Du:
* Den Status Deiner USV in Echtzeit überwachen.
* Warnmeldungen und Benachrichtigungen bei Stromausfällen oder anderen Problemen erhalten.
* Eine zentrale Verwaltung für mehrere USVs haben.
Durch die Integration in HomeAssistant kannst Du zudem automatisierte Aktionen basierend auf dem USV-Status erstellen, z.B. das Herunterfahren von Geräten bei Stromausfällen oder das Senden von Benachrichtigungen.
## Vorbereitung: Was Du benötigst 🛠️
Bevor wir loslegen, stelle sicher, dass Du folgende Dinge hast:
* Einen Docker-fähigen Server (z.B. ein Raspberry Pi oder ein NAS).
* Eine installierte und funktionierende Docker-Umgebung.
* HomeAssistant (bereits installiert und konfiguriert).
## WebNUT in Docker installieren 🐳
### Schritt 1: Docker-Container für WebNUT erstellen
Erstelle einen neuen Docker-Container für WebNUT. Öffne dazu ein Terminal und führe folgenden Befehl aus:
```bash
docker run -d \
--name=webnut \
-e TZ=Europe/Berlin \
-p 80:80 \
--restart unless-stopped \
--cap-add=NET_ADMIN \
christronyxyocum/webnut
```
Dieser Befehl startet einen neuen Docker-Container für WebNUT mit den notwendigen Einstellungen. Stelle sicher, dass der Port 80 verfügbar ist oder passe die Portweiterleitung entsprechend an.
### Schritt 2: WebNUT konfigurieren
Nachdem der Container gestartet ist, solltest Du die Konfigurationsdatei bearbeiten, um Deine USV-Geräte hinzuzufügen. Die Konfigurationsdatei findest Du unter `/etc/nut/ups.conf`. Du kannst den Container betreten und die Datei mit einem Editor wie `nano` bearbeiten:
```bash
docker exec -it webnut /bin/bash
nano /etc/nut/ups.conf
```
Füge in der Datei die Informationen zu Deiner USV hinzu, z.B.:
```ini
[myups]
driver = usbhid-ups
port = auto
desc = "Meine USV"
```
Speichere die Datei und verlasse den Editor. Starte den NUT-Dienst neu, damit die Änderungen wirksam werden.
## WebNUT in HomeAssistant integrieren 🏠
### Schritt 1: NUT-Integration in HomeAssistant hinzufügen
Öffne Deine HomeAssistant-Instanz und gehe zu den Integrationen. Füge eine neue Integration hinzu und suche nach "Network UPS Tools (NUT)". Wähle diese aus und konfiguriere sie mit den entsprechenden Einstellungen:
* Host: `IP-Adresse_Deines_WebNUT_Containers`
* Port: `3493`
* Benutzername: `Dein_NUT_Benutzername` (falls konfiguriert)
* Passwort: `Dein_NUT_Passwort` (falls konfiguriert)
### Schritt 2: WebNUT in HomeAssistant verwenden
Nach der erfolgreichen Konfiguration sollten die USV-Daten in HomeAssistant verfügbar sein. Du kannst nun Sensoren, Benachrichtigungen und Automatisierungen basierend auf dem USV-Status erstellen. Beispiel für eine Automatisierung:
```yaml
alias: 'Benachrichtigung bei Stromausfall'
trigger:
- platform: state
entity_id: sensor.myups_status
to: 'OB Discharging'
action:
- service: notify.notify
data:
message: "Achtung! Stromausfall erkannt. USV läuft im Batteriebetrieb."
```
## Fazit 🎉
Mit WebNUT und Docker kannst Du Deine USV einfach und effektiv überwachen. Durch die Integration in HomeAssistant erhältst Du zusätzlich die Möglichkeit, Dein Smart Home noch smarter zu machen, indem Du automatisierte Aktionen basierend auf dem USV-Status einrichtest. Viel Spaß beim Einrichten und Ausprobieren!
---
If you like my posts, it would be nice if you follow my [Blog](https://blog.disane.dev) for more tech stuff. | disane |
1,913,992 | Exploring the concept of the Typescript - Day 2 Of #100DaysOfFullStackChallnege | So, Welcome back everyone 👋 I'm Aditya, and I'm starting a new series for the next 100 days to become... | 0 | 2024-07-06T17:58:30 | https://dev.to/zendeaditya/exploring-the-concept-of-the-typescript-day-2-of-100daysoffullstackchallnege-37fk | typescript, webdev, programming, nextjs | So, Welcome back everyone 👋
I'm Aditya, and I'm starting a new series for the next 100 days to become an excellent Full-stack Developer.
Today is the Day 2 of my journey. Today I learned about typescript.
Introduction to TypeScript -> TypeScript is nothing but JavaScript with the `Types`. Let's see what I mean by types. Here is a short example to start with.
**1. Types In Ts**
- 1. String type in ts
Let's define string in javascript
```
let language = "typescript";
```
and if we console this it will give output
```
typescript
```
here typescript gives you an extra edge in that you can define type something like
```
let language:string = "typescript";
```
so the `language` variable only stores the string data type into it.
It helps to reduce runtime errors and make code more readable.
It is okay that you can write
```
let language = 10;
```
so JavaScript gives you an output
```
10
```
but in typescript, if you mention the variable type in this case it is `string` you cannot assign different data type values. You have to assign a string in this case.
here is another example that shows you how typescripts work
If you create a simple object in javascript,
```
const user = {
name:"aditya",
age:21,
}
```
now if you access the property that does not exist in the `user` object javascript will return you an `undefined`
```
//js code
console.log(user.location) //undefined
```
but in the case of typescripts, you get an error
`Property 'location' does not exist on type '{ name: string; age: number; }'.`
- 2. number type in ts.
same as string, you can declare the variable that can only store the number and not other data types than numbers. e.g
```
const age:number = 20;
```
in the variable age, you can't store the data type other than a number.
you can use all javascript primitives data types like this.
Let's move to another important concept of typescript that I learned today
**3. Array**
Let's talk about how to declare an array in ts.
here is how do we declare an array in js
```
const arr= [1,,2,3,4,5,"aditya"];
```
you can store any data inside the array in js but when it comes to typescript it restricts to store of the data other than you write with `:` notation.
For example
```
const arr:number[]= [1,,2,3,4,5,"aditya"];
console.log(arr);
```
I write string inside number array so typescript is telling me that `Type 'string' is not assignable to type 'number'`. You have to write numbers and If you want to store data of different data types like numbers and string what you can do is you can use something called `Union Type`. In this type, you can two or more data types by separating them using the pipe symbol `|`.
For the above example, we can write typescript code as
```
const arr: (number | string)[] = [1, 2, 3, 4, 5, "aditya", 'string'];
console.log(arr);
```
This way you can store numbers and strings in the same array.
**2. Type Aliases**
TypeScript's type aliases allow you to create a new name for a type. This can be useful for simplifying complex type definitions and improving code readability. You can create type aliases for various types including primitive types, union types, object types, and more.
Let's see what is type aliases with some examples,
Suppose you want to define an object with some property inside it like we mentioned above
```
const user = {
name:"aditya",
age:21,
}
```
so what you can do is you can define a type alias for the whole object.
To define the type alias you have to use the keyword `type`.
```
type User= {
name: string;
age: number;
};
```
and then you can assign it to an object like
```
const user:User = {
name:"aditya",
age:21,
}
```
You can use type alliance with string, number, booleans, object, array, and functions.
if you want to make any value optional then you can use `?` to make it optional
for example, you want to make age an optional parameter so what you can do is that
```
type User= {
name: string;
age?: number;
};
```
**3. Interface**
In TypeScript, interfaces are a powerful way to define the structure of objects. They provide a way to define the shape of an object, including the types of its properties and the functions it can contain. Interfaces are especially useful for defining complex types and ensuring type safety in your code.
```
interface Person {
name: string;
age: number;
}
const user: Person = {
name: "Aditya",
age: 21,
};
```
Thank you for joining me on this journey through the 100 Days Full Stack Challenge. Each day brings new insights, challenges, and opportunities for growth, and I'm thrilled to share every step with you. Your support and feedback mean the world to me, and I'm excited to continue building and learning together. 🚀
Don't forget to follow my progress on my personal website and stay connected on [Dev.to](https://dev.to/zendeaditya), [Medium](https://medium.com/@adityazende), and [Hashnode](https://hashnode.com/@adityazende01). Let's keep pushing the boundaries of what's possible in web development! 🌐💻
Until next time, keep coding, keep creating, and keep pushing forward. 💪✨
| zendeaditya |
1,913,987 | Laravel Caching - Explained Simply | Caching is like keeping your favorite toy right on top of your toy box, so you can grab it quickly... | 27,571 | 2024-07-06T17:47:54 | https://backpackforlaravel.com/articles/tips-and-tricks/laravel-advanced-caching-explained-simply | learning, laravel, development, caching | Caching is like keeping your favorite toy right on top of your toy box, so you can grab it quickly whenever you want to play.
Similarly, cache in Laravel stores data so your website can show it quickly without searching or querying all over again. Just like finding your toy faster, caching helps websites load quickly.
## How Does Caching Work in Laravel?
Laravel has a built-in storage called `cache`. It helps you store data and quickly get it later.
### Storing Data in the Cache
For example - weather data. Weather won't change on every request, so why make a DB or API call every time? It would be way more efficient to keep the info handy in the cache:
```php
$weatherData = getWeatherFromService();
Cache::put('current_weather', $weatherData, 60);
```
Here, `current_weather` is the cache key, `$weatherData` is the info, and `60` is the minutes to keep it.
### Retrieving and Checking Data
To get weather data from the cache:
```php
$weatherData = Cache::get('current_weather');
```
To check if the data is still there:
```php
if (Cache::has('current_weather')) {
// It's there!
}
```
### Deleting Data from the Cache
To refresh weather data, remove old info:
```php
Cache::forget('current_weather');
```
## Cool Things You Can Do with Caching
- For a busy blog or for an online shop, cache posts & products to boost speed:
```php
use Illuminate\Support\Facades\Cache;
$blogPosts = Cache::remember('blog_posts', 30, function () {
return DB::table('posts')->get();
});
$productList = Cache::remember('product_list', 10, function () {
return Product::all();
});
```
- Use Model events to setup cache automation, to keep cache data up to date. Example:
```php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Facades\Cache;
class Post extends Model
{
protected $fillable = ['title', 'content'];
protected static function boot()
{
parent::boot();
static::retrieved(function ($post) {
Cache::remember("post_{$post->id}", 60, function () use ($post) {
return $post;
});
});
static::created(function ($post) {
Cache::forget('all_posts');
Cache::remember("post_{$post->id}", 60, function () use ($post) {
return $post;
});
});
static::updated(function ($post) {
Cache::forget("post_{$post->id}");
Cache::forget('all_posts');
Cache::remember("post_{$post->id}", 60, function () use ($post) {
return $post;
});
});
static::deleted(function ($post) {
Cache::forget("post_{$post->id}");
Cache::forget('all_posts');
});
}
public static function getAllPosts()
{
return Cache::remember('all_posts', 60, function () {
return self::all();
});
}
public static function searchPosts($query)
{
return Cache::remember("search_posts_{$query}", 60, function () use ($query) {
return self::where('title', 'like', "%{$query}%")
->orWhere('content', 'like', "%{$query}%")
->get();
});
}
}
```
## Wrapping Up
Caching in Laravel makes websites faster by storing data for quick access. Start using caching to speed up your Laravel app and make users happy!
All of the above have been previously shared on our Twitter, one by one. If you're on Twitter, [follow us](https://twitter.com/laravelbackpack) - you'll ❤️ it. You can also check the first article of the series, which is on the [Top 5 Scheduler Functions you might not know about](https://backpackforlaravel.com/articles/tips-and-tricks/laravel-advanced-top-5-scheduler-functions-you-might-not-know-about). Keep exploring, and keep coding with ease using Laravel. Until next time, happy caching! 🚀 | karandatwani92 |
1,913,986 | Top 10 SEO Tips to Boost Your Website’s Visibility | Search Engine Optimization (SEO) is essential for improving the visibility of your website in search... | 0 | 2024-07-06T17:47:43 | https://dev.to/savagenewcanaan/top-10-seo-tips-to-boost-your-websites-visibility-2e3o | seo, google, webdev, html | <p style="text-align: justify;">Search Engine Optimization (SEO) is essential for improving the visibility of your website in search engine results. By optimizing your site, you can attract more organic traffic, improve your rankings, and ultimately increase your business’s online presence. Here are the top 10 SEO tips to help you achieve these goals.</p>
<h3 style="text-align: justify;">1. <strong>Conduct Thorough Keyword Research</strong></h3>
<p style="text-align: justify;">Keyword research is the foundation of effective SEO. Identify the terms and phrases your target audience uses to search for your products or services. Tools like Google Keyword Planner, <a href="https://www.semrush.com/">SEMrush</a>, and Ahrefs can help you find relevant keywords with high search volumes and low competition.</p>
<h3 style="text-align: justify;">2. <strong>Optimize Your Content</strong></h3>
<p style="text-align: justify;">Once you’ve identified your target keywords, integrate them naturally into your content. Focus on creating high-quality, informative, and engaging content that addresses the needs and questions of your audience. Use keywords in titles, headings, meta descriptions, and throughout the body of your text without overstuffing.</p>
<h3 style="text-align: justify;">3. <strong>Improve Page Load Speed</strong></h3>
<p style="text-align: justify;">Page load speed is a critical factor in both user experience and SEO. Slow-loading pages can lead to higher bounce rates and lower rankings. Optimize images, leverage browser caching, and use a content delivery network (CDN) to enhance your site’s performance. Tools like Google PageSpeed Insights can provide valuable insights and recommendations.</p>
<h3 style="text-align: justify;">4. <strong>Ensure Mobile-Friendliness</strong></h3>
<p style="text-align: justify;">With the majority of searches now conducted on mobile devices, having a mobile-friendly website is essential. Use responsive design to ensure your site looks and functions well on all devices. Google’s Mobile-Friendly Test can help you identify and fix any mobile usability issues.</p>
<h3 style="text-align: justify;">5. <strong>Use Clean and Descriptive URLs</strong></h3>
<p style="text-align: justify;">URLs should be easy to read and include relevant keywords. Avoid using long strings of numbers or irrelevant characters. A clean and descriptive URL structure not only helps search engines understand your content but also improves user experience.</p>
<h3 style="text-align: justify;">6. <strong>Optimize Meta Tags</strong></h3>
<p style="text-align: justify;">Meta titles and descriptions are important for both SEO and click-through rates. Write compelling meta titles that include your primary keywords and accurately describe the content of the page. Meta descriptions should be concise, informative, and include a call to action to encourage users to click through to your site.</p>
<h3 style="text-align: justify;">7. <strong>Create High-Quality Backlinks</strong></h3>
<p style="text-align: justify;">Backlinks from reputable websites signal to search engines that your content is valuable and trustworthy. Focus on earning high-quality backlinks through guest blogging, creating shareable content, and building relationships with industry influencers. Avoid low-quality or spammy link-building practices, as they can harm your rankings.</p>
<h3 style="text-align: justify;">8. <strong>Utilize Header Tags</strong></h3>
<p style="text-align: justify;">Header tags (H1, H2, H3, etc.) help organize your content and make it easier for search engines to understand its structure. Use H1 tags for main titles and H2 or H3 tags for subheadings. Incorporating keywords into your header tags can also improve your SEO.</p>
<h3 style="text-align: justify;">9. <strong>Optimize Images</strong></h3>
<p style="text-align: justify;">Images can enhance the visual appeal of your website, but they also need to be optimized for SEO. Use descriptive file names and include alt text that describes the image and includes relevant keywords. Compress images to reduce their file size and improve page load speed.</p>
<h3 style="text-align: justify;">10. <strong>Monitor and Analyze Performance</strong></h3>
<p style="text-align: justify;">Regularly monitor your website’s performance using tools like Google Analytics and Google Search Console. Analyze metrics such as traffic, bounce rates, and conversion rates to understand how your SEO efforts are paying off. Use this data to make informed decisions and continuously refine your strategy.</p>
<p style="text-align: justify;">Implementing these top 10 SEO tips can significantly enhance your website’s visibility and drive more organic traffic. By focusing on keyword research, content optimization, technical performance, and ongoing analysis, you can build a strong foundation for SEO success. Stay up-to-date with the latest SEO trends and algorithm changes to maintain and improve your rankings over time. With dedication and consistent effort, you can achieve lasting results and grow your online presence.</p> | savagenewcanaan |
1,913,985 | Best Cars Under 15 Lakhs in India | Are you searching for the latest models of cars in India for the year 2024 that you can buy at or... | 0 | 2024-07-06T17:43:05 | https://dev.to/suggestmycar/best-cars-under-15-lakhs-in-india-12lf | cars, india, vehicle, car |
Are you searching for the latest models of cars in India for the year 2024 that you can buy at or below 15 lakhs? Welcome if you have wondered where you should turn to, congratulations if you know where to find it. This guide will guide you through the best picks in the market that are as good as the expensive ones, if not better and all at reasonable prices.
##
** Recommendations for [Best Cars under Rs 15 lakhs in India 2024](https://suggestmycar.com/best-cars-under-15-lakhs-in-india-2024/)**
1. Current top and best cars available under 15 lakhs in India: Maruti
## **Suzuki Swift. **
Price Range: ₹5. 85 Lakh – ₹8. 67 Lakh
Engine: 1. 2 L K-Series Petrol
Power Output: 83 HP
Torque: 113 Nm
Transmission: 5-Speed Manual and AMT
Mileage: Suzuki Power Drive System up to 23 kmpl
Key Features: AGS with SmartPlay Studio which is the LED projector headlamps.
Maruti Suzuki Swift is a car that is pockets friendly, requires minimal costs for maintainance and most of all delivers excellent performance. Thus, it is equally best for the first-time driver as well as the experienced one.
2. Here is the specification of the **Hyundai i20**: Best Cars Under 15 Lakhs in India 2024.
## Hyundai I20
Price Range: ₹6. 91 Lakh – ₹11. 40 Lakh
Engine Options: 1. 2 liters of Kappa Petrol, 1. 0 L Turbo GDi
Power Output: The horsepower capacity is up to 120 HP.
Torque: Up to 172 Nm
Transmission: Gear box 6 speed manual, 7 speed DCT
Mileage: Up to 20. 35 kmpl
Key Features: BlueLinkConnected CarTechnology, 8 power windows, anti lock braking system, 6 airbags, sunroof.
The Hyundai i20 is a car model that appeals to the young market due to its technically good and high-performance engines and non-compromising comfort.
3.
## **Tata Nexon**
– Excellent and Best Cars Under 15 Lakhs in India 2024
Price Range: ₹7. 60 Lakh – ₹14. 08 Lakh
Engine Options: 1. 2 L REVOTRON TWIN CAM petrol, 1. 5 L Revotorq Diesel
Power Output: 120 HP and above
Torque: Of up to 170 Nm.
Transmission: An Aerodynamic body kit, 18 inch alloy wheels, projector headlights comes with the options of 6-Speed Manual or AMT.
Mileage: Up to 13. 0 Desired Km /Pl
Key Features: CD/MP3/WMA player with Harman Kardon top & preset sound and 16 in alloy wheels, auto mobile AC, sun roof
The Tata Nexon is also not left behind when it comes to safety as well as the interior space where families are hunting for a compact SUV.
4.
## Kia Sonet
– Top Notch & Best Cars To Buy within the Price Segment of Under 15 Lakhs in India 2024
Price Range: ₹7. 49 Lakh – ₹13. 99 Lakh
Engine Options: 1. 0 Turbo Petrol, 1. 5 CRDi Diesel
Power Output: With output to 120 HP.
Torque: Up to 230 Nm
Transmission: Six speed manual or seven speed dual clutch transmission.
Mileage: Depending on the capacity, it can go up to 24 kmpl.
Key Features: Premium Sound System by BOSE, 10. 25-inch touch screen system, six air bags
The Kia Sonet possesses a touch of elegance and has splendid safety ratings to boot making it perfect for the young family man or the young executive.
5.
## Mahindra XUV300
– CAP first-class best cars under 15 lakhs in India 2024.
Price Range: ₹8. 41 Lakh – ₹14. 07 Lakh
Engine Options: 1. 2 L of Turbo Petrol, 1. 5 L Diesel
Power Output: from 88 HP up to 117 HP
Torque: 0 to 300 Nm
Transmission: 6-Speed Manual
Mileage: upto 20[kmpl]
Key Features: There are seven of them, the air conditioning is fully automatic, as well as there are two control systems for temperature, forward frigid ray sensors.
The Mahindra XUV300 is built specially with many safety features for both urban and off-road driving.
Innovations in budget-cars technology
The modern means of budget transportation have many characteristics which, previously, belonged only to the luxury cars. Such are touch display infotainment, connectivity solutions, as well as advanced driver assist systems (ADAS), which bring the fun of having a car and safety to increased levels.
## Fuel Economy and Other Green Choices
Price consciousness is another thing that is important to anyone who is considering buying a car. Its operating expenses are low due to efficiency and cost of car’s such as Maruti Suzuki Baleno, Hyundai i20 and Honda Jazz. Also, there is an innovation of environmentally-friendly models that use minimal fuel and let out minimal gases in relation to environmental conservation objectives.
##
## Conclusion
The selection of a car below 15 lakhs in India in the year 2024 is also full of choices with almost excellent performance, safety, and features. Regardless of what option you are more interested in ranging from fuel efficiency to raw power and a host of technologies in between, there is a car that is ideal for this tag price out there. For other suggestions depending on your endeavors and budget type, feel free to visit **[suggestmycar.com](https://suggestmycar.com/)** for more info regarding the same,
till then its good bye !!
Also Visit: **[dev.to](https://dev.to/)**
| suggestmycar |