Ah, that makes sense. I was forgetting that the parameter label was on the
initial value.
+1 from me!
-BJ
> On Apr 14, 2017, at 3:07 PM, Guillaume Lessard via swift-evolution
> <swift-evolution@swift.org> wrote:
>
> The mutating version would have a parameter label to differentiate it:
>
> let a = [1, 2, 3, 4, 5]
>
> let b = a.reduce(into: []) { (result, element) in
> result.append(element * 2)
> }
>
> --
> GL
>
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