[swift-evolution] Add an ifPresent function to Optional
erica at ericasadun.com
Mon Mar 14 17:44:05 CDT 2016
> No. My argument is that map on collections and on optionals are two
> completely different things. They unify on a level that does not
> exist in Swift (higher-kinded types). We could name Optional.map()
> differently, and that would be a separate decision from renaming
> Collection.map(), but we used the name `map` primarily because of
> precedent, not because there is a HKT notion of these two operations
> being the same.
Convergent evolution then, like tenrecs and hedgehogs?
Because the way I've been thinking of it is like a teeny tiny collection that either can fit one thing snugly into it or not.
You're going to make me have completely different mental images when I use Optional.map now, and I don't even
have a mental metaphor to replace it with.
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