✨Nora Tindall (@tindall@cybre.space)
cybre.space
Rust needs evert(), which turns an iterator over Result of T into a Result of a collection of T or a collection of errors currently the most ergonomic way to do this is to wrap a whole pipeline in a function boundary and use `?`.
  • @nutomic@lemmy.mlM
    2•2 years ago

    I think she is talking about this functionality which already exists. It is not very intuitive though.

    let res = my_collection
.iter()
.map(|x| method_that_returns_result(x))
.collect::<Result<Vec<T>, Error>>()?;

    So it turns a Vec<Result, Error> into Result<Vec<T>, Error>, and you can turn it into Vec<T> simply with ?. Otherwise you would probably need a for loop.