Create vector with 0 or 1 elements from an Option

user_15602349 0
Viewed 92

Is there a shorter and simpler way to achieve this:

let o: Option<i32> = ...;
let ve: Vec<i32> = match o {
    None => vec![],
    Some(n) => vec![n],
};
rust
2 Answers
let o: Option<i32> = Some(2);
let ve: Vec<i32> = o.into_iter().collect();

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user_114987730

Option implements IntoIterator, so you can make an iterator and collect it:

let ve: Vec<i32> = o.into_iter().collect();
user_4937290
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