Memoize in JavaScript
Memoize in JavaScript Given a function fn, return a memoized version of that function. A memoized function is a function that will never be called twice with the same …
Javascript Leetcode Problem
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Allow One Function Call
Allow One Function Call Given a function fn, return a new function that is identical to the original function except that it ensures fn is called at …
Function Composition in JavaScript
Function Composition in JavaScript Given an array of functions [f1, f2, f3, …, fn], return a new function fn that is the function composition of the array of functions. The function composition of [f(x), g(x), …
Array Reduce Transformation
Array Reduce Transformation Given an integer array nums, a reducer function fn, and an initial value init, return a reduced array. A reduced array is created by applying the following …
Filter Elements from Array
Filter Elements from Array Given an integer array arr and a filtering function fn, return a new array with a fewer or equal number of elements. The returned array …
Apply Transform Over Each Element in the Array
Apply Transform Over Each Element in the Array Given an integer array arr and a mapping function fn, return a new array with a transformation applied to …
Counter II in JavaScript
Write a function createCounter. It should accept an initial integer init. It should return an object with three functions. The three functions are: Example 1: …
Counter in JavaScript
Counter in JavaScript Given an integer n, return a counter function. This counter function initially returns n and then returns 1 more than the previous value every subsequent time it is …
Create a Hello World Function
Create a Hello World Function Write a function createHelloWorld. It should return a new function that always returns “Hello World”. Example 1: Input: args = [] …
2694. Event Emitter
2694. Event Emitter JavaScript Leetcode Problems Design an EventEmitter class. This interface is similar (but with some differences) to the one found in Node.js or the Event …