• Apr 10, 2025 •hasnaoui1
0 likes • 11 views
const express = require('express') const mongoose = require('mongoose') const cors = require('cors') const dotenv = require('dotenv') const server = express() dotenv.config() server.use(express.json()) server.get('/' , (req , res)=>{ res.send('Hello') }) //4.lancement du serveur server.listen(process.env.PORT , ()=>{ console.log('server run on http://localhost:'+process.env.PORT) })
• Feb 3, 2021 •C S
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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
• Nov 19, 2022 •CodeCatch
0 likes • 2 views
const powerset = arr => arr.reduce((a, v) => a.concat(a.map(r => r.concat(v))), [[]]); powerset([1, 2]); // [[], [1], [2], [1, 2]]
• Sep 13, 2023 •C S
/** * @param {number[]} nums * @return {boolean} */ var containsDuplicate = function(nums) { return new Set(nums).size !== nums.length };
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const getTimezone = () => Intl.DateTimeFormat().resolvedOptions().timeZone; // Example getTimezone();
const gcd = (...arr) => { const _gcd = (x, y) => (!y ? x : gcd(y, x % y)); return [...arr].reduce((a, b) => _gcd(a, b)); }; gcd(8, 36); // 4 gcd(...[12, 8, 32]); // 4