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بهذه الطريقة، يصبح كل كائن أقل اعتماداً على التفاصيل الداخلية، وأكثر مرونة وقابلاً للاختبار.

عندما تعتمد الكائنات على إنشاء التبعيات داخلياً، فإن النظام يصبح مترابطاً بشكل كبير. حقن التبعيات يفصل عملية الإنشاء عن الاستخدام، مما يقلل الترابط ويجعل البنية أكثر تنظيماً.

This ensures your SSH client pings the server regularly.

That’s it. With these changes, your SSH session will stay alive and won’t drop after just a minute.

Update App.js:

import React from 'react';
import { useTranslation } from 'react-i18next';
import { BrowserRouter, Routes, Route, useNavigate } from 'react-router-dom';
import { routes } from './routes';
import './i18n';

const LanguageSwitcher = () => {
  const { i18n } = useTranslation();
  const navigate = useNavigate();

  const switchLang = (lang) => {
    const currentPath = window.location.pathname;
    const currentPage = currentPath.split('/')[1];

    i18n.changeLanguage(lang).then(() => {
      // Re-map path using new language
      const t = i18n.getFixedT(lang);
      const mappedRoutes = {
        en: { accueil: 'home', 'a-propos': 'about-us' },
        fr: { home: 'accueil', 'about-us': 'a-propos' },
      };

      const newPath = `/${mappedRoutes[lang][currentPage] || ''}`;
      navigate(newPath);
    });
  };

  return (
    <div className="lang-switch">
      <button onClick={() => switchLang('en')}>EN</button>
      <button onClick={() => switchLang('fr')}>FR</button>
    </div>
  );
};

const App = () => {
  const { t } = useTranslation();

  return (
    <BrowserRouter>
      <LanguageSwitcher />
      <Routes>
        {routes(t).map((route, idx) => (
          <Route key={idx} path={route.path} element={route.element} />
        ))}
      </Routes>
    </BrowserRouter>
  );
};

export default App;

• GDPR requires local-language privacy policies
• China's Cybersecurity Law needs local hosting + Mandarin support
• Saudi localization laws mandate Arabic for all government services

Your React app must support legal localization where applicable.

• Translate your app without performance loss
• Format dates, numbers, currencies natively
• Scale your translations across large React apps

• Add RTL (right-to-left) support for Arabic or Hebrew
• Integrate with translation platforms like Locize or Crowdin
• Explore SSR-ready i18n setups (e.g., with Next.js)
• Use useContext for localized theme changes (e.g., cultural preferences)

As web applications grow larger and teams become more distributed, the traditional monolithic frontend architecture becomes harder to scale. Enter micro-frontends — the 2025-ready solution that brings backend microservices thinking to the frontend world.

Micro-frontends allow different teams to work independently on isolated UI components, which are then stitched together at runtime. This enables:

   import React from 'react';
   import useStore from './store';

   function Counter() {
     const { count, increase, decrease } = useStore();
     return (
       <div>
         <h1>{count}</h1>
         <button onClick={increase}>Increase</button>
         <button onClick={decrease}>Decrease</button>
       </div>
     );
   }

   export default Counter;

With these steps, you've set up a basic state management system using Zustand without the need for additional boilerplate or context providers.

   const value = useMemo(() => ({ user, setUser }), [user]);

   const increment = useCallback(() => setCount(c => c + 1), []);

Run the following command in the MySQL prompt:

UNINSTALL COMPONENT 'file://component_validate_password';

Edit AppArmor profile for MySQL:

sudo nano /etc/apparmor.d/usr.sbin.mysqld

Install the MySQL server package:

sudo apt install mysql-server

Run:

sudo ubuntu-drivers devices

Let’s build a small ScopedPointer class.

template <typename T>
class ScopedPointer {
private:
    T* ptr;

public:
    explicit ScopedPointer(T* p = nullptr) : ptr(p) {}

    ~ScopedPointer() {
        delete ptr;
    }

    T& operator*() const { return *ptr; }
    T* operator->() const { return ptr; }
    T* get() const { return ptr; }

    void reset(T* p = nullptr) {
        if (ptr != p) {
            delete ptr;
            ptr = p;
        }
    }

    // Prevent copy
    ScopedPointer(const ScopedPointer&) = delete;
    ScopedPointer& operator=(const ScopedPointer&) = delete;
};

In C++11 and newer, also consider:

• Move Constructor
• Move Assignment Operator

• Easy for most users
• Stops most bots
• Sometimes annoying

• No user interaction
• Uses a score (0–1) to decide if the user is a bot

Create a .env file:

REDIS_URL=redis://localhost:6379

• Connect the longer leg (anode) of the LED to digital pin 13.
• Connect the shorter leg (cathode) to one end of the 220Ω resistor.

• Connect the other end of the resistor to the Arduino’s GND pin.

Create a new file called sketch.js in your project folder. We’ll use p5.js to access the webcam and display the video on a canvas:

let video;
let detector;
let detections = [];

function setup() {
  // Create the canvas to match the video dimensions
  createCanvas(640, 480);
  // Capture video from the webcam
  video = createCapture(VIDEO);
  video.size(640, 480);
  video.hide();

  // Load the pre-trained COCO-SSD model
  cocoSsd.load().then(model => {
    detector = model;
    console.log("Model Loaded!");
    // Begin detecting objects every frame
    detectObjects();
  });
}

function detectObjects() {
  detector.detect(video.elt).then(results => {
    detections = results;
    // Continue detection in a loop
    detectObjects();
  });
}

function draw() {
  // Draw the video
  image(video, 0, 0);

  // Draw detection boxes and labels if available
  if (detections) {
    for (let i = 0; i < detections.length; i++) {
      let object = detections[i];
      stroke(0, 255, 0);
      strokeWeight(2);
      noFill();
      rect(object.bbox[0], object.bbox[1], object.bbox[2], object.bbox[3]);
      noStroke();
      fill(0, 255, 0);
      textSize(16);
      text(object.class, object.bbox[0] + 4, object.bbox[1] + 16);
    }
  }
}

npm install -g @tauri-apps/cli

We’ll start by creating a new Svelte project. You can use a template via degit:

Implementation: Lexer.cpp

#include "DSL/Lexer.h"
#include <cctype>
#include <cstdlib>

Lexer::Lexer(const std::string& input) : input(input) {}

char Lexer::currentChar() {
    if (pos < input.size()) {
        return input[pos];
    }
    return '\0';
}

void Lexer::advance() {
    pos++;
}

void Lexer::skipWhitespace() {
    while (std::isspace(currentChar())) {
        advance();
    }
}

Token Lexer::number() {
    size_t start = pos;
    while (std::isdigit(currentChar()) || currentChar() == '.') {
        advance();
    }
    std::string numStr = input.substr(start, pos - start);
    double value = std::strtod(numStr.c_str(), nullptr);
    return { TokenType::Number, numStr, value };
}

Token Lexer::getNextToken() {
    skipWhitespace();

    char current = currentChar();

    if (current == '\0') {
        return { TokenType::EndOfFile, "", 0 };
    }
    if (std::isdigit(current) || current == '.') {
        return number();
    }

    Token token;
    token.text = std::string(1, current);
    token.value = 0;
    switch (current) {
        case '+': token.type = TokenType::Plus; break;
        case '-': token.type = TokenType::Minus; break;
        case '*': token.type = TokenType::Asterisk; break;
        case '/': token.type = TokenType::Slash; break;
        case '(': token.type = TokenType::LParen; break;
        case ')': token.type = TokenType::RParen; break;
        default: token.type = TokenType::Invalid; break;
    }
    advance();
    return token;
}