Well, I didn’t see which exact insult you wrote to be deleted by mods (I value their support emotionally, but frankly would prefer to replace all “deleted by mod” cases with “hidden by mod” to see what’s been posted if I want), but laziness in functional programming is not limited to lazy iterators. I meant lazy evaluations, as in Lisp. If that still doesn’t make sense to you, please postpone answering by 8-10 hours.