Is there a way to write code like this in

Question

Is there a way to write code like this in

a shorter form?

let a = if let Some(b) = &c {
if let Some(d) = b.e {
calcSome(d)
} else {
0
}
} else {
0
};

So it would become one else instead of two

0

08.09.2023

2 ответов

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Thomas

(&c) .and_then(|b| b.e.map(calcSome)) .unwrap_or(0)

0

08.09.2023

Holmes · Accepted Answer

Holmes

if the type of b is B, you can destruct it like this: if let Some(B {e: Some(d), ..}) = &c { calcSome(d) } else {0}

0

08.09.2023

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