• Sep 13, 2023 •C S
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/** * @param {number[]} nums * @return {number[]} */ var productExceptSelf = function(nums) { var output = []; var leftMult = 1; var rightMult = 1; for (var i=nums.length - 1; i >= 0; i--) { output[i] = rightMult; rightMult *= nums[i]; console.log({output: JSON.stringify(output), i}) } for (var j=0; j < nums.length; j++) { output[j] *= leftMult; leftMult *= nums[j]; console.log({output: JSON.stringify(output), j}) } return output; }; console.log(productExceptSelf([1, 2, 3, 4]))
• Nov 19, 2022 •CodeCatch
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const nums = [1, 2, 3]; const strs = Array.from('est'); nums.push(6); nums.push(4, 9); strs.unshift('t'); nums.length; // 6 nums[nums.length - 1]; // 9 strs[0]; // 't' strs[2]; // 's' nums.slice(1, 3); // [2, 3] nums.map(n => n * 2); // [2, 4, 6, 12, 8, 18] nums.filter(n => n % 2 === 0); // [2, 6, 4] nums.reduce((a, n) => a + n, 0); // 25 strs.reverse(); // ['t', 's', 'e', 't'] strs.join(''); // 'test' const nums = new Set([1, 2, 3]); nums.add(4); nums.add(1); nums.add(5); nums.add(4); nums.size; // 5 nums.has(4); // true nums.delete(4); nums.has(4); // false [...nums]; // [1, 2, 3, 5] nums.clear(); nums.size; // 0 const items = new Map([ [1, { name: 'John' }], [2, { name: 'Mary' }] ]); items.set(4, { name: 'Alan' }); items.set(2, { name: 'Jeff' }); items.size; // 3 items.has(4); // true items.get(2); // { name: 'Jeff' } items.delete(2); items.size; // 2 [...items.keys()]; // [1, 4] [...items.values()]; // [{ name: 'John' }, { name: 'Alan' }] items.clear(); items.size; // 0
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// `arr` is an array const clone = arr => arr.slice(0); // Or const clone = arr => [...arr]; // Or const clone = arr => Array.from(arr); // Or const clone = arr => arr.map(x => x); // Or const clone = arr => JSON.parse(JSON.stringify(arr)); // Or const clone = arr => arr.concat([]);
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/** * @param {number[]} nums * @return {boolean} */ var containsDuplicate = function(nums) { return new Set(nums).size !== nums.length };
• May 17, 2021 •LeifMessinger
//Upvotes comments according to a regex pattern. I tried it out on https://www.reddit.com/r/VALORANT/comments/ne74n4/please_admire_this_clip_precise_gunplay_btw/ //Known bugs: //If a comment was already upvoted, it gets downvoted //For some reason, it has around a 50-70% success rate. The case insensitive bit works, but I think some of the query selector stuff gets changed. Still, 50% is good let comments = document.getElementsByClassName("_3tw__eCCe7j-epNCKGXUKk"); //Comment class let commentsToUpvote = []; const regexToMatch = /wtf/gi; for(let comment of comments){ let text = comment.querySelector("._1qeIAgB0cPwnLhDF9XSiJM"); //Comment content class if(text == undefined){ continue; } text = text.textContent; if(regexToMatch.test(text)){ console.log(text); commentsToUpvote.push(comment); } } function upvote(comment){ console.log(comment.querySelector(".icon-upvote")); //Just showing you what it's doing comment.querySelector(".icon-upvote").click(); } function slowRecurse(){ let comment = commentsToUpvote.pop(); //It's gonna go bottom to top but whatever if(comment != undefined){ upvote(comment); setTimeout(slowRecurse,500); } } slowRecurse();
const celsiusToFahrenheit = (celsius) => celsius * 9/5 + 32; const fahrenheitToCelsius = (fahrenheit) => (fahrenheit - 32) * 5/9; // Examples celsiusToFahrenheit(15); // 59 celsiusToFahrenheit(0); // 32 celsiusToFahrenheit(-20); // -4 fahrenheitToCelsius(59); // 15 fahrenheitToCelsius(32); // 0