It sounds like the author is not aware of the `FromIterator` trait which is implemented for `Result` which allows short circuiting to a `Result` type. Instead

It sounds like the author is not aware of the `FromIterator` trait which is implemented for `Result` which allows short circuiting to a `Result` type. Instead of collecting to: Vec<Result<T,Error>> You collect to: Result<Vec<T>,Error> as your explicit type and your iterator will short circuit on the first error. I admit this was not obvious to me either and should be talked about more as it is very handy.