Pet peeves:
.map()
(or any other array iteration method like .filter
, etc), in JavaScript for simply going through the array instead of .forEach()
or a loop`. In general, use the array methods for their purpose:
.map
- I have an array, I need another array where each item is based on the first one.flatMap
- like .map
but I use it when each new item also an array.filter
- I have an array, I need less of it.find
- I have an array, I need one item from it.findIndex
- I have an array, I need the index of an item.some
- I have an array, I need to check if at least one item passes a check.every
- I have an array, I need to see if all items pass a check.forEach
- I have an array, I need to do something with each item. Usually I don't want to return anything.reduce
/.reduceRight
- I have an array, I need to make it into "one value". I'll have to check if I really need to use reduce for thisfor
, for..in
, for..of
, while
, do..while
loops if the problem can't (or doesn't need to) fit into one of the above