Sent from my iPhone
> On Dec 12, 2016, at 16:15, John Holdsworth via swift-evolution
> <swift-evolution@swift.org> wrote:
>
> I’d like to raise again the idea of optionality when referencing a key or
> calling a function could be possible using a ? i.e instead of
>
> let a = key != nil ? dict[key] : nil
>
> you could just write:
>
> let a = dict[key?]
>
> or even
>
> let a = func( arg: argumentThatMayBeNull? ) // not called if argument is
> nil
The first part is pretty easy to add in an extension:
extension Dictionary {
subscript(_ key:Key?) -> Value? {
return key != nil ? self[key!] : nil
}
}
At least I think that works... I'm on my phone so I can't test it.
- Dave Sweeris
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