I wouldn't do any of this, Ruby / Python are OO so they provide already baked in primitives to do this, e.g: array.map { |e| e + val } It bugs me when dev

I wouldn't do any of this, Ruby / Python are OO so they provide already baked in primitives to do this, e.g: array.map { |e| e + val } It bugs me when developers roll their own instead of utilizing what's already been done (minus performance reasons).