this post was submitted on 16 Oct 2024
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What are some mind blowing Rust tricks? (self.rust)
submitted 1 day ago* (last edited 1 day ago) by little_ferris to c/rust
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If we were to create a Rust version of this page for Haskell, what cool programming techniques would you add to it?

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[–] [email protected] 2 points 1 day ago* (last edited 1 day ago)

Well, you would determine the TypeId of SomeOtherType, then search for that as the key in your HashMap and get back a None, because no entry exists and then you'd hand that back to the user.
I guess, my little usage example should've included handling of an Option value...

So, it's only a runtime error, if you decide to .unwrap() or similar.