BiosBoy

class Singleton {
    constructor() {
        if (Singleton.instance) {
            return Singleton.instance;
        }
        this.data = [];
        Singleton.instance = this;
    }

    getData() {

BiosBoy

# Code Examples from "Top 5 Underestimated Native Browser Features You Should Be Using"

## 1. Bluetooth: Connecting to Devices Wirelessly 📡

### Example: Connecting to a Bluetooth Device

```typescript
async function connectToBluetooth() {
  try {

BiosBoy

function Person(name) {
    this.name = name;
}

Person.prototype.greet = function() {
    console.log(`Hello, my name is ${this.name}`);
};

const alice = new Person('Alice');

BiosBoy

const userRole = 'admin';

if (userRole === 'admin' || userRole === 'editor' || userRole === 'moderator') {
  console.log('Access granted');
} else {
  console.log('Access denied');
}


const userRole = 'admin';

BiosBoy

# Webpack Bundle Analyzer Examples

## Install the Package

```bash
npm install --save-dev webpack-bundle-analyzer


const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;

BiosBoy

npm install apollo-server-express graphql

const express = require('express');
const { ApolloServer, gql } = require('apollo-server-express');

// Define your type definitions (schema)
const typeDefs = gql`
  type Query {
    hello: String
  }

BiosBoy

const arr1 = [1, 2, 3, 4];
const result1 = arr1.flatMap(x => [x, x * 2]);
console.log(result1); // [1, 2, 2, 4, 3, 6, 4, 8]

const arr2 = ['a', 'b', 'c', 'd'];
console.log(arr2.at(-1)); // 'd'
console.log(arr2.at(-2)); // 'c'

const arr3 = [1, 2, 3, 4, 5];
const result2 = arr3.findLast(x => x % 2 === 0);

BiosBoy

const originalArray = [1, 2, 3, 4, 5];
const slicedArray = originalArray.slice(2, 4);

console.log(slicedArray); // [3, 4]
console.log(originalArray); // [1, 2, 3, 4, 5]


const originalArray = [1, 2, 3, 4, 5];
const splicedArray = originalArray.splice(2, 2);

BiosBoy

interface User {
  id: number;
  name: string;
  email: string;
}

function updateUser(userId: number, updates: Partial<User>) {
  // Imagine this function updates a user in the database
  console.log(userId, updates);
}

BiosBoy

// Old way
if (user && user.address && user.address.city) {
  console.log(user.address.city);
}

// Modern way with Optional Chaining
console.log(user?.address?.city);

// Nullish Coalescing
const userName = user.name ?? 'Guest';