In JS, functions like filter/map/reduce can help when you try to write immutable code because you only work with the arguments, and return an output value. You

In JS, functions like filter/map/reduce can help when you try to write immutable code because you only work with the arguments, and return an output value. You don't have to define an empty/temporary array first, and fill it up in your regular for-loop for example. I don't 'hate' loops, I still use them sometimes. Personally I just try to avoid them (in JS) because I feel like I can solve my problem without any side-effects. It's something less to think about. It's nice when the logic/variables for a function are encapsulated entirely inside that function. It also makes it easy to extract functions so you can re-use them elsewhere.