Write while loop equivalent in elixir

[sribe]

@silverdr

I would understand that the “repeatedly” is infinite, but then my first guess would be that the second part “takes” 16 instances from the infinite stream and passes to the third part, which enumerates over them, or so. But it seems like backward thinking in the context.

Key is that the docs for Stream.take start off “Lazily takes…”, meaning elements not evaluated until requested. So it immediately returns, yes, and the return is an enumerable that will yield 16 values, and that enumerable is passed into the Enum.find? call, but the values themselves are not evaluated by the enumerable until requested, if ever.