JavaScript

🔗LC2724 🟢 Easy 🧩 Pattern – JSON, Arrays and JS Sort 📅 Day 24/30 Days of JavaScript Given an array arr and a function fn, return a sorted array sortedArr. You can assume fn only returns numbers and those numbers determine the sort order of sortedArr. sortedArr must be sorted in ascending order… Read More »Sort By – 2724

🔗LC2631 🟡 Medium 🧩 Pattern – JSON, Objects and Arrays 📅 Day 23/30 Days of JavaScript Write code that enhances all arrays such that you can call the array.groupBy(fn) method on any array and it will return a grouped version of the array. A grouped array is an object where each key is the output of… Read More »Group By – 2631

🔗LC2619 🟢 Easy 🧩 Pattern – JSON and Arrays 📅 Day 22/30 Days of JavaScript Write code that enhances all arrays such that you can call the array.last() method on any array and it will return the last element. If there are no elements in the array, it should return -1. You may… Read More »Array Prototype Last – 2619

🔗LC2677 🟢 Easy 🧩 Pattern – JSON and Arrays 📅 Day 21/30 Days of JavaScript Given an array arr and a chunk size size, return a chunked array. A chunked array contains the original elements in arr; but consists of subarrays each of length size. The length of the last subarray may be less than the size of arr.length is not… Read More »Chunk Array – 2677

🔗LC2727 🟢 Easy 🧩 Pattern – JSON and Objects 📅 Day 20/30 Days of JavaScript Given an object or an array, return if it is empty. You may assume the object or array is the output of JSON.parse. Example Solution

🔗LC2721 🟡 Medium 🧩 Pattern – Promises and Time 📅 Day 19/30 Days of JavaScript Given an array of asynchronous functions functions, return a new promise promise. Each function in the array accepts no arguments and returns a promise. All the promises should be executed in parallel. promise resolves: promise rejects: Please solve… Read More »Execute Asynchronous Functions in Parallel – 2721