[swift-evolution] Fwd: Reduce with inout
schristopher at bignerdranch.com
Mon Jan 16 11:36:30 CST 2017
I like it.
Inicio del mensaje reenviado:
> De: Dave Abrahams via swift-evolution <swift-evolution at swift.org>
> Fecha: 16 de enero de 2017, 5:15:23 PM GMT+1
> Para: swift-evolution at swift.org
> Asunto: Re: [swift-evolution] Reduce with inout
> Responder a: Dave Abrahams <dabrahams at apple.com>
>> on Mon Jan 16 2017, Chris Eidhof <swift-evolution at swift.org> wrote:
>> How does everyone feel about adding a second version of `reduce` to
>> `Sequence`? Instead of a `combine` function that's of type `(A, Element) ->
>> A`, it would be `(inout A, Element) -> ()`. This way, we can write nice
>> functionals algorithms, but have the benefits of inout (mutation within the
>> function, and hopefully some copy eliminations).
>> IIRC, Loïc Lecrenier first asked this on Twitter. I've been using it ever
>> since, because it can really improve readability (the possible performance
>> gain is nice, too).
>> Here's `reduce` with an `inout` parameter, including a sample:
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