[swift-evolution] Reduce with inout

Karl Wagner razielim at gmail.com
Tue Jan 17 16:09:04 CST 2017

> On 16 Jan 2017, at 14:49, Chris Eidhof via swift-evolution <swift-evolution at swift.org> wrote:
> Hi,
> 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: https://gist.github.com/chriseidhof/fd3e9aa621569752d1b04230f92969d7 <https://gist.github.com/chriseidhof/fd3e9aa621569752d1b04230f92969d7>
> -- 
> Chris Eidhof
> _______________________________________________
> swift-evolution mailing list
> swift-evolution at swift.org
> https://lists.swift.org/mailman/listinfo/swift-evolution


I would even argue for it to be the default.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.swift.org/pipermail/swift-evolution/attachments/20170117/e46fa84f/attachment.html>

More information about the swift-evolution mailing list