• 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));
• Feb 5, 2021 •LeifMessinger
0 likes • 2 views
class Timer{ start(){ this.startTime = Date.now(); } stop(){ const dt = Date.now() - this.startTime; console.log(dt); return dt; } getExecTime(fun, asynchronous){ return asynchronous ? this.getAsyncExecTime(fun) : this.getSyncExecTime(fun); } getSyncExecTime(fun){ this.start(); fun(); return this.stop(); } async getAsyncExecTime(fun){ this.start(); await fun(); return this.stop(); } static average(fun, numTimes, asynchronous = false){ const times = []; const promises = []; let timer = new Timer(); if(asynchronous){ for(let i = 0; i < numTimes; i++){ timer.getAsyncExecTime(fun); } }else{ for(let i = 0; i < numTimes; i++){ timer.getSyncExecTime(fun); } } return (times => times.reduce(((sum, acc) => sume + acc), 0) / times.length); } static async timeAsync(fun, numTimes){ if(numTimes <= 1) return new Timer().getAsyncExecTime(fun); const promises = []; let timer = new Timer(true); for(let i = 0; i < numTimes; i++){ promises.push(fun().catch((e)=>{})); } try{ await Promise.all(promises).catch((e)=>{}); }catch(e){ //do absolutely nothing } return timer.stop(); } constructor(start = false){ if(start) this.start(); } }
• Mar 28, 2023 •Helper
const Discord = require('discord.js'); const client = new Discord.Client(); const token = 'YOUR_BOT_TOKEN'; // When the bot is ready, log a message to the console client.on('ready', () => { console.log(`Logged in as ${client.user.tag}!`); }); // When a user sends a message, check if they are authenticated client.on('message', async (msg) => { if (!msg.author.bot && !msg.author.authenticated) { const filter = (m) => m.author.id === msg.author.id; const collector = msg.channel.createMessageCollector(filter, { time: 15000 }); // Send an authentication message to the user msg.author.send('Please authenticate yourself by clicking this link: ' + generateAuthURL(msg.author.id)); collector.on('collect', async (m) => { // Check if the message contains the authentication code if (m.content.startsWith('!auth ')) { const code = m.content.slice(6); const { access_token } = await getAccessToken(code); // Set the user's authenticated status and access token msg.author.authenticated = true; msg.author.access_token = access_token; collector.stop(); } }); collector.on('end', () => { if (!msg.author.authenticated) { msg.author.send('Authentication timed out.'); } }); } }); // Generate an authentication URL for the user function generateAuthURL(userId) { const redirectURI = encodeURIComponent('YOUR_REDIRECT_URL'); const scopes = 'identify'; const clientID = 'YOUR_CLIENT_ID'; return `https://discord.com/api/oauth2/authorize?client_id=${clientID}&redirect_uri=${redirectURI}&response_type=code&scope=${scopes}&state=${userId}`; } // Exchange the authorization code for an access token async function getAccessToken(code) { const redirectURI = encodeURIComponent('YOUR_REDIRECT_URL'); const clientID = 'YOUR_CLIENT_ID'; const clientSecret = 'YOUR_CLIENT_SECRET'; const res = await fetch('https://discord.com/api/oauth2/token', { method: 'POST', headers: { 'Content-Type': 'application/x-www-form-urlencoded', }, body: `grant_type=authorization_code&code=${code}&redirect_uri=${redirectURI}&client_id=${clientID}&client_secret=${clientSecret}`, }); return await res.json(); } client.login(token);
• 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(); });
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const insertionSort = arr => arr.reduce((acc, x) => { if (!acc.length) return [x]; acc.some((y, j) => { if (x <= y) { acc.splice(j, 0, x); return true; } if (x > y && j === acc.length - 1) { acc.splice(j + 1, 0, x); return true; } return false; }); return acc; }, []); insertionSort([6, 3, 4, 1]); // [1, 3, 4, 6]
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]