Friday, 26 October, 2018 UTC


Whenever you want to loop over an array and create a new array based on each element in the first array, it's possible to use the `map` function on the array, instead of using a `for` loop. There are a few advantages to `map` over `for`, including shorter code that is more composable - meaning you can easily extract and reuse the function(s) that you're using. You can also chain multiple `map` calls together.