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 5, 2025 · Practice with solution of exercises on JavaScript functions; exercise on reverse a number, palindrome, generates all combinations of a string and more from w3resource.

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.

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

Jan 13, 2021 · function solution(input){ arr=input.split(" "); for(var i=0;i<arr.length;i++) { console.log(arr[i]); } return arr; } When you call a function, the value will be its return value. If no return value is specified, a function returns undefined.

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.

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.

Aug 12, 2016 · It allows you to pass expressions into a Parser that returns a function object that can then evaluate inputs. It supports trig functions (sin, cos, ect...) and other handy built in functions such as abs & ciel. Examples: http://silentmatt.com/javascript-expression-evaluator/