[swift-evolution] [Pitch] Add an all algorithm to Sequence

[Víctor Pimentel Rodríguez]

On Thu, Apr 6, 2017 at 12:44 AM, Jonathan Hull via swift-evolution <
swift-evolution at swift.org> wrote:

> On that note: ‘containsOnly' is still my favorite by a wide margin.  I
> know it is longer than ‘all’, but it’s behavior is much clearer (especially
> for those of us who have never used or heard of ‘all’ in other languages),
> and it’s relationship with ‘contains’ is also very clear.
>

Also +1 to containsOnly for this very reason.

In other languages (Python, Ruby, etc) that have an `all` method, they also
have an `any` method, thus maintaining certain consistency.

In the Swift standard library that `any` method is called `contains`, so
`containsOnly` matches nicely that consistency.

-- 
Víctor Pimentel
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