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並前往https://newbedev.com/how-do-i-stop-iteration-and-return-an-error-when-iterator-map-returns-a-result-err

How do I stop iteration and return an error when Iterator::map ...

#[derive(Debug)] struct Item; type Id = String; fn find(id: &Id) -> Result<Item, String> { Err(format!("Not found: {:?}", id)) } fn main() { let s = |s: ...

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