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What is the idiomatic way to write a map closure with a result type? Do I just collect it as a result and use a ? On it? Doesn’t that make the iteration occur twice? #rust #rustlang

If I remember correctly, Result is an IntoIterator type, so you could flat_map instead of map if you’re just trying to ignore the Err’s.

What if I want to early return if there’s any error

I think you could replace starting at .collect() with .map(|result| result .map(/* your Ok value logic */)) .take_until(|result| result .is_err() .fold(|result| { let aggregate = result?/* rest of the fold logic here */ }) I use [take_until](docs.rs/take-until/l...), but take_while could work too