![]() Presume that you will only get numbers in the input array.Ĭonst input = Square the value of every element in the array. Age difference from the youngest and oldest.I would like to prove to you that by using Map, Filter, and Reduce array methods, not only will the code be more readable, but you will also be able to analyze the problem better and write the code with ease. You could use 'nested for loops' to solve most of the problems you will encounter, but that leaves the code hard to read and understand. Arrays of numbers, arrays of objects, arrays of arrays of objects, multi-dimensional arrays, and you will need to simplify, transform or manipulate them. ![]() If you need some additional help, you can check out our Arrays video from #lockdown learning series in which we discuss Map, Filter and Reduce or contact the author of the article directly.Īs a JavaScript developer, you will come across arrays. Try to solve the problems without taking a peek at the solution. Every exercise has a brief description of the problem, starting code, links to relevant MDN docs, and expected results. We have prepared some exercises to help out beginner devs to solidify their understanding of Map, Filter, Reduce, and other useful array methods. It's really hard to test your programming knowledge after you have completed a tutorial or a lecture. Written by David Abram Last updated: Tuesday, November 21, 2023
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