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Small pattern that made my code much cleaner (lemmy.ca)

submitted 11 months ago by [email protected] to c/[email protected]

9 comments fedilink hide all child comments

This is a really simple silly thing I just realized, but I noticed I have a lot code that looks something like this:

fn foo() -> Result&lt;(), Error> {
    // do something
}

fn bar() -> Option&lt;()> {
    let Ok(f) = foo() else {
        return None;
    };
}

I hated that if-statement. I realized today that I could simplify to:

fn bar() -> Option&lt;()> {
    let f = foo().ok()?;
}

And that cleaned up my code a lot. It's a tiny thing, but when it's okay to discard the error from the result, makes such a big difference when you have a lot of them!

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[–] [email protected] 2 points 11 months ago

Yeah that's a good point. This is a special case where the file is simply caching runtime results so errors surrounding it not being read aren't a big deal.