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Ticking clock

0 likes • Nov 19, 2022 • 0 views
JavaScript
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More JavaScript Posts

array shuffle

0 likes • Nov 19, 2022 • 0 views
JavaScript
const shuffle = ([...arr]) => {
let m = arr.length;
while (m) {
const i = Math.floor(Math.random() * m--);
[arr[m], arr[i]] = [arr[i], arr[m]];
}
return arr;
};
const foo = [1, 2, 3];
shuffle(foo); // [2, 3, 1], foo = [1, 2, 3]

Bitwise XOR operator

0 likes • Nov 19, 2022 • 0 views
JavaScript
//JavaScript program to swap two variables
//take input from the users
let a = prompt('Enter the first variable: ');
let b = prompt('Enter the second variable: ');
// XOR operator
a = a ^ b
b = a ^ b
a = a ^ b
console.log(`The value of a after swapping: ${a}`);
console.log(`The value of b after swapping: ${b}`);

Check if array is empty

0 likes • Nov 19, 2022 • 0 views
JavaScript
arr = [] // empty array
const isEmpty = arr => !Array.isArray(arr) || arr.length === 0;
// Examples
isEmpty([]); // true
isEmpty([1, 2, 3]); // false

Untitled

CAS
0 likes • Aug 13, 2023 • 2 views
JavaScript
function sortNumbers(arr) {
return arr.slice().sort((a, b) => a - b);
}
const unsortedArray = [4, 1, 9, 6, 3, 5];
const sortedArray = sortNumbers(unsortedArray);
console.log("Unsorted Numbers:", unsortedArray);
console.log("\n");
console.log("Sorted Numbers:", sortedArray);

React Short Circuit Evaluation

0 likes • Feb 3, 2021 • 0 views
JavaScript
import React, { useState } from 'react' import Welcome from '../components/Welcome' function About() { const [showWelcome, setShowWelcome] = useState(false) return ( <div> {showWelcome ? <Welcome /> : null} </div> <div> {showWelcome && <Welcome /> } </div> ) } export default App

Mongoose DB Connection

0 likes • Mar 11, 2021 • 0 views
JavaScript
require("dotenv").config();
const mongoose = require("mongoose");
const db = process.env.MONGO_URI;
const connectDB = async () => {
try {
await mongoose.connect(db, {
useNewUrlParser: true,
useUnifiedTopology: true,
useFindAndModify: false,
useCreateIndex: true
});
console.log("MongoDB Connected");
} catch (err) {
console.error(err.message);
}
};
module.exports = connectDB;