[swift-evolution] [Pitch] New collection-based 'repeat' API

Karl Wagner razielim at gmail.com
Mon May 1 21:52:25 CDT 2017

> On 2 May 2017, at 04:44, Xiaodi Wu <xiaodi.wu at gmail.com> wrote:
> Does this gain something by being part of the standard library as opposed to being built on top of it?

Well, somebody thought repeatElement<T> was general enough to make part of the standard library. If we’re going to allow repeating a single item as a Collection, we might as well allow generalise it to repeating any Collection in a loop (including a CollectionOfOne, which is the existing use-case).

Personally, I usually want to repeat a collection of things far more often than I want to repeat an individual thing. It annoys me that the standard library only provides the one I almost never need.

Additionally, it could help remove the top-level “repeatElement” function, which I know irritates some people who would rather us not have any top-level functions in the standard library.

- Karl

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