DSA

🔗LC2634 🟢 Easy 🧩 Pattern – Array Transformations 📅 Day 6/30 Days of JavaScript Given an integer array arr and a filtering function fn, return a filtered array filteredArr. The fn function takes one or two arguments: filteredArr should only contain the elements from the arr for which the expression fn(arr[i],… Read More »Filter Elements from Array – 2634

🔗LC2635 🟢 Easy 🧩 Pattern – Array Transformations 📅 Day 5/30 Days of JavaScript 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.… Read More »Apply Transform Over Each Element in Array – 2635

🔗LC2665 🟢 Easy 🧩 Pattern – Closures 📅 Day 4/30 Days of 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 Solution We return an object with the three required functions as properties, we implement a… Read More »Counter II – 2665

🔗LC2704 🟢 Easy 🧩 Pattern – Closures 📅 Day 3/30 Days of JavaScript 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. Example Solution Here, we need to understand how we are returning an object that… Read More »To Be Or Not To Be – 2704

🔗LC2620 🟢 Easy 🧩 Pattern – Closures 📅 Day 2/30 Days of 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 called (n, n + 1, n + 2, etc). Example Solution In JavaScript,… Read More »Counter – 2620

🔗 LC2667 🟢 Easy 🧩 Pattern – Closures and Higher Order Functions 📅 Day 1/30 Days of JavaScript Write a function createHelloWorld. It should return a new function that always returns “Hello World”. Example Solution While this is a straightforward question, it’s important to understand key JavaScript concepts such as Higher Order Functions,… Read More »Create Hello World Function – 2667