For the sake of argument, use `forEach` if you want to introduce side effects. `map` and `reduce` are names with meaning, and passing impure functions to them i

For the sake of argument, use `forEach` if you want to introduce side effects. `map` and `reduce` are names with meaning, and passing impure functions to them is more confusing than passing some procedural function to `forEach` or using `for of`. It is something of a nit-picky argument to be sure, but it is a good mental habit to have. Edit: I think being strict with the semantic building blocks is a good mental habit, not necessarily making nit-picky arguments.