> I recall that the thing that made me stick with Rust is the Iterator trait. It blew my mind that you could make something an Iterator, apply a handful of diff

> I recall that the thing that made me stick with Rust is the Iterator trait. It blew my mind that you could make something an Iterator, apply a handful of different combinators, then pass the resulting Iterator into any function that took an Iterator. What languages did the author use before? Is this any different from the interface pattern seen in many other languages?