Sort By – 2724

🔗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 by fn output.

You may assume that fn will never duplicate numbers for a given array.

Example

Input: arr = [5, 4, 1, 2, 3], fn = (x) => x
Output: [1, 2, 3, 4, 5]
Explanation: fn simply returns the number passed to it so the array is sorted in ascending order.Code language: JavaScript (javascript)

Solution

/**
 * @param {Array} arr
 * @param {Function} fn
 * @return {Array}
 */
var sortBy = function (arr, fn) {
    return arr.sort((a, b) => fn(a) - fn(b));
};Code language: JavaScript (javascript)

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