• Nov 19, 2022 •CodeCatch
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// There are n rings and each ring is either red, green, or blue. The rings are distributed across ten rods labeled from 0 to 9. // You are given a string rings of length 2n that describes the n rings that are placed onto the rods. Every two characters in rings forms a color-position pair that is used to describe each ring where: // The first character of the ith pair denotes the ith ring's color ('R', 'G', 'B'). // The second character of the ith pair denotes the rod that the ith ring is placed on ('0' to '9'). // For example, "R3G2B1" describes n == 3 rings: a red ring placed onto the rod labeled 3, a green ring placed onto the rod labeled 2, and a blue ring placed onto the rod labeled 1. // Return the number of rods that have all three colors of rings on them. let rings = "B0B6G0R6R0R6G9"; var countPoints = function(rings) { let sum = 0; // Always 10 Rods for (let i = 0; i < 10; i++) { if (rings.includes(`B${i}`) && rings.includes(`G${i}`) && rings.includes(`R${i}`)) { sum+=1; } } return sum; }; console.log(countPoints(rings));
• Nov 8, 2023 •LeifMessinger
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function copyString(text){ async function navigatorClipboardCopy(text){ if(document.location.protocol != "https:"){ return false; } return new Promise((resolve, reject)=>{ navigator.clipboard.writeText(text).then(()=>{resolve(true);}, ()=>{resolve(false);}); }); } function domCopy(text){ if(!(document.execCommand)){ console.warn("They finally deprecated document.execCommand!"); } const input = document.createElement('textarea'); input.value = text; document.body.appendChild(input); input.select(); const success = document.execCommand('copy'); document.body.removeChild(input); return success; } function promptCopy(){ prompt("Copy failed. Might have ... somewhere. Check console.", text); console.log(text); } function done(){ alert("Copied to clipboard"); } navigatorClipboardCopy(text).catch(()=>{return false;}).then((success)=>{ if(success){ done(); }else{ if(domCopy(text)){ done(); }else{ promptCopy(); } } }); }
• 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;
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]
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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
• Mar 22, 2022 •LeifMessinger
//QM Helper by Leif Messinger //Groups numbers by number of bits and shows their binary representations. //To be used on x.com const minterms = prompt("Enter your minterms separated by commas").split(",").map(x => parseInt(x.trim())); const maxNumBits = minterms.reduce(function(a, b) { return Math.max(a, Math.log2(b)); }); const bitGroups = []; for(let i = 0; i < maxNumBits; ++i){ bitGroups.push([]); } for(const minterm of minterms){ let outputString = (minterm+" "); //Count the bits let count = 0; for (var i = maxNumBits; i >= 0; --i) { if((minterm >> i) & 1){ ++count; outputString += "1"; }else{ outputString += "0"; } } bitGroups[count].push(outputString); } document.body.textContent = ""; document.body.style.setProperty("white-space", "pre"); for(const group of bitGroups){ for(const outputString of group){ document.body.textContent += outputString + "\r\n"; } }