[swift-evolution] [Idea] Use optionals for non-optional parameters

[David Sweeris]

> On Aug 15, 2016, at 17:51, David Hart via swift-evolution <swift-evolution at swift.org> wrote:
> 
> I prefer the much simpler and natural:
> 
> let value = x.map { foo.bar(x: $0) }
> 
> Is it me or has everybody been avoiding the map solution for some reason. It's the most elegant way to do such operations IMHO.
It doesn't help for functions with multiple parameters. At one point I'd made a "multimap" top-level function for iterating over multiple sequences... maybe something like that?

- Dave Sweeris
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