• Nov 19, 2022 •CodeCatch
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const toFixed = (n, fixed) => ~~(Math.pow(10, fixed) * n) / Math.pow(10, fixed); // Examples toFixed(25.198726354, 1); // 25.1 toFixed(25.198726354, 2); // 25.19 toFixed(25.198726354, 3); // 25.198 toFixed(25.198726354, 4); // 25.1987 toFixed(25.198726354, 5); // 25.19872 toFixed(25.198726354, 6); // 25.198726
const bucketSort = (arr, size = 5) => { const min = Math.min(...arr); const max = Math.max(...arr); const buckets = Array.from( { length: Math.floor((max - min) / size) + 1 }, () => [] ); arr.forEach(val => { buckets[Math.floor((val - min) / size)].push(val); }); return buckets.reduce((acc, b) => [...acc, ...b.sort((a, b) => a - b)], []); }; bucketSort([6, 3, 4, 1]); // [1, 3, 4, 6]
• Mar 11, 2021 •C S
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import { configureStore } from "@reduxjs/toolkit"; import { combineReducers } from "redux"; import profile from "./profile"; import auth from "./auth"; import alert from "./alert"; const reducer = combineReducers({ profile, auth, alert, }); const store = configureStore({ reducer }); export default store;
• Oct 15, 2022 •CodeCatch
3 likes • 4 views
const MongoClient = require('mongodb').MongoClient; const assert = require('assert'); // Connection URL const url = 'mongodb://localhost:27017'; // Database Name const dbName = 'myproject'; // Use connect method to connect to the server MongoClient.connect(url, function(err, client) { assert.equal(null, err); console.log("Connected successfully to server"); const db = client.db(dbName); client.close(); });
const linearSearch = (arr, item) => { for (const i in arr) { if (arr[i] === item) return +i; } return -1; }; linearSearch([2, 9, 9], 9); // 1 linearSearch([2, 9, 9], 7); // -1
const getURLParameters = url => (url.match(/([^?=&]+)(=([^&]*))/g) || []).reduce( (a, v) => ( (a[v.slice(0, v.indexOf('='))] = v.slice(v.indexOf('=') + 1)), a ), {} );