Learn how to use JavaScript’s map() method to transform arrays like a pro—in just 100 seconds. We’ll show you how it works, where it shines, and give you examples that make it click ...

Learn how JavaScript’s built-in functions like map() and filter(), as well as compose() and chain(), support a more elegant handling of JavaScript arrays.

The JavaScript method, Array.map(f) is a pure function in that it takes a function as a parameter. That last point about pure functions warrants further exploration. First-order functions vs. pure ...