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did you know, if you have an iterator that emits Result<T, E>, you can collect it into a Result<Vec<T>, E>?
@balrogboogie ah that's pretty interesting. I just injected an Err into the resultize() function and it yielded the error perfectly. Very cool!
Since an example fits in a toot:
extern crate rand;
fn resultize(i: usize) -> Result<usize, String> {
if rand::random() {
Ok(i)
} else {
Err("whoops!".into())
}
}
fn main() {
let iter = (0..10).map(|i| resultize(i));
let results = iter.collect::<Result<Vec<_>, _>>();
println!("{:?}", results);
}
Whoa whoa whoa
Hold on
What's a toot
@balrogboogie do you have an example?