Mar 5, 2025 · This resource offers a total of 145 JavaScript Functions problems for practice. It includes 29 main exercises, each accompanied by solutions, detailed explanations, and four related problems. [An Editor is available at the bottom of the page to write and execute the scripts.] 1. Reverse Number. Write a JavaScript function that reverses a number.

Function `flattenArr()` flattens a 2D array by combining each sub array into 1D array by using JavaScript reduce. function flattenArr(arr) { return arr.reduce((result, array) => result.concat(array)); } console.log(flattenArr([[1, 2, 3], [4, 5, 6], [7, 8, 9]])) // [1, 2, 3, 4, 5, 6, 7, 8, 9]

Mar 7, 2025 · It includes 1041 main exercises, each accompanied by solutions, detailed explanations, and three/four related problems. JavaScript is a lightweight, cross-platform, object-oriented scripting language that operates within host environments (e.g., web browsers) to programmatically control objects.

100 interactive JavaScript exercises that will help beginner and advanced developers to better understand the language. Created by Pava

Apr 8, 2025 · A JavaScript function is a block of code designed to perform a specific task. Functions are only executed when they are called (or "invoked"). JavaScript provides different ways to define functions, each with its own syntax and use case.

We have gathered a variety of React exercises from most of the chapters in our JavaScript Tutorial. The exercises are a mix of "multiple choice" and "fill in the blanks" questions. The answer can be found in the corresponding tutorial chapter.

Mar 5, 2025 · Write a JavaScript program to apply a function against an accumulator and each element in the array (from left to right), returning an array of successively reduced values. Click me to see the solution

By the end of these exercises, you will have a foundational understanding of JavaScript basics, including variables, functions, loops, and basic DOM manipulation. Start with the first exercise and attempt to solve it before checking the hint or solution.

Jan 31, 2025 · Functions are the backbone of JavaScript, allowing developers to write modular, reusable, and efficient code. This curated list of problems will help you master JavaScript Functions. Whether you're a beginner or looking to refine your expertise, these problems will enhance your JavaScript skills!

Oct 25, 2023 · 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), h(x)] is fn(x)...