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يسهل حقن التبعيات استبدال العناصر الحقيقية بمحاكاة (Mocks) أثناء الاختبارات، مما يقلل التعقيد ويزيد دقة نتائج الاختبار.

يمكن تعديل أو استبدال أي تبعية دون تغيير الكائن الرئيسي، مما يجعل الكود أسهل في التطوير على المدى الطويل.

Restart SSH:

sudo systemctl restart sshd

Create i18n.js:

import i18n from 'i18next';
import { initReactI18next } from 'react-i18next';
import LanguageDetector from 'i18next-browser-languagedetector';

import en from './locales/en.json';
import fr from './locales/fr.json';

i18n
  .use(LanguageDetector)
  .use(initReactI18next)
  .init({
    resources: { en: { translation: en }, fr: { translation: fr } },
    fallbackLng: 'en',
    interpolation: {
      escapeValue: false,
    },
  });

export default i18n;

new Intl.NumberFormat('en-US', {
  style: 'currency',
  currency: 'USD'
}).format(4999.99);

// Output: $4,999.99

Make this dynamic in React:

import React from 'react';
import { useTranslation } from 'react-i18next';

const Home = () => {
  const { t, i18n } = useTranslation();

  const changeLanguage = (lng) => {
    i18n.changeLanguage(lng);
  };

  const today = new Date();
  const price = 199.99;

  return (
    <div className="p-4">
      <h1>{t('welcome')}</h1>

      <div className="mt-4">
        <strong>{t('language')}:</strong>
        <button onClick={() => changeLanguage('en')} className="ml-2">EN</button>
        <button onClick={() => changeLanguage('fr')} className="ml-2">FR</button>
      </div>

      <p>{t('date_example', { date: today })}</p>
      <p>{t('price_example', { price })}</p>
    </div>
  );
};

export default Home;

Install i18next-format plugin (optional):

Start the remote app (Vue):

cd analytics-app
npx webpack serve

import create from 'zustand';
import { persist } from 'zustand/middleware';

const useStore = create(persist(
  (set) => ({
    count: 0,
    increase: () => set((state) => ({ count: state.count + 1 })),
  }),
  {
    name: 'counter-storage',
  }
));

Zustand allows you to select specific parts of the state to prevent unnecessary re-renders:

In this example, Greeting will only re-render when the name prop changes. This optimization is particularly beneficial for components that render frequently with the same props.([React][4], [Content That Scales][5])

Passing functions as props can cause child components to re-render unnecessarily because functions are recreated on every render. The useCallback hook memoizes functions, ensuring they maintain the same reference unless their dependencies change.([React][4])

UNINSTALL COMPONENT 'file://component_validate_password';

If successful, you'll see:

If needed, recreate the MySQL socket directory:

sudo mkdir -p /var/run/mysqld
sudo chown mysql:mysql /var/run/mysqld

sudo mysql_secure_installation

This script will prompt you to set a root password, remove anonymous users, disallow remote root login, remove the test database, and reload privilege tables.

You’ll see a list like:

driver   : nvidia-driver-550 - distro non-free recommended
...
driver   : xserver-xorg-video-nouveau - distro free builtin

Consider this code:

void loadData() {
    char* buffer = new char[1024];
    // some processing...
    if (someCondition()) {
        return; // leak!
    }
    delete[] buffer;
}

• Avoid shallow copies.
• Always implement deep copy logic.
• Follow the Rule of Three (or Rule of Five).
• Prefer std::string, std::vector, or smart pointers in modern C++.

Understanding deep copy is essential for writing robust, bug-free C++ code.

https://www.google.com/recaptcha/admin

Limit how many times a single IP can submit a form within a short period (e.g., 3 times per minute).

You’re no longer blindly relying on a package—you understand and control the system.

Want to extend this?

Open the Arduino IDE and enter the following code:

// Arduino LED Blink Example

// The setup function runs once when you press reset or power the board.
void setup() {
  // Initialize digital pin 13 as an output.
  pinMode(13, OUTPUT);
}

// The loop function runs repeatedly forever.
void loop() {
  digitalWrite(13, HIGH);  // Turn the LED on (HIGH is the voltage level)
  delay(1000);             // Wait for one second (1000 milliseconds)
  digitalWrite(13, LOW);   // Turn the LED off by making the voltage LOW
  delay(1000);             // Wait for one second
}

In this tutorial, you’ll learn how to create a web application that performs real-time object detection using your webcam. By combining TensorFlow.js—Google’s library for machine learning in JavaScript—with p5.js for creative coding and drawing, you can build an interactive app that detects objects on the fly.

This guide will walk you through setting up your development environment, loading a pre-trained model, capturing video input, and overlaying detection results on the video feed.

npm run dev

In a separate terminal window, start Tauri’s development server:

(3 + 4) * (5 - 2) / 2

The lexer (or tokenizer) converts a stream of characters into a sequence of tokens. Each token represents a logical unit, such as a number or operator.