168. collect::, _>>() — Bail an Iterator on the First Error

Thu, 28 May 2026 17:00:00 +0100

You have a Vec<&str> of numbers to parse and you want to bail the moment one of them is malformed. The hand-rolled loop with ? works, but collect() does the same thing in one line — and most people never realize the trick is in the turbofish.

Collect on rustbites

168. collect::, _>>() — Bail an Iterator on the First Error