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Leetcode

[Leetcode] JS 30 Filter Elements from Arrays

[Leetcode] JS 30 Filter Elements from Arrays

Question 2634 truthy values Question Given an integer array arr and a filtering function fn, return a filtered array filteredArr. The fn function takes one or two arguments: * arr[i] - number from the arr * i - index of arr[i] filteredArr should only contain the elements from the arr

[Leetcode] JS 30 Apply Transform over Each Element in Array

[Leetcode] JS 30 Apply Transform over Each Element in Array

Question 2635 high-order function Question Given an integer array arr and a mapping function fn, return a new array with a transformation applied to each element. The returned array should be created such that returnedArray[i] = fn(arr[i], i). Please solve it without the built-in Array.map method. Example

[Leetcode] JS 30 Counter II

[Leetcode] JS 30 Counter II

Question 2665 arrow function/pre-increment operators/return object of functions Question Write a function createCounter. It should accept an initial integer init. It should return an object with three functions. The three functions are: * increment() increases the current value by 1 and then returns it. * decrement() reduces the current value

[Leetcode] JS 30 To Be Or Not to Be

[Leetcode] JS 30 To Be Or Not to Be

Question 2704 return object of functions / IIFE / throw error function Write a function expect that helps developers test their code. It should take in any value val and return an object with the following two functions. * toBe(val) accepts another value and returns true if the two values === each other.