[swift-evolution] Proposal: Add function SequenceType.find()

[Kevin Ballard]

Proposal PR submitted as https://github.com/apple/swift-evolution/pull/94

-Kevin Ballard

On Tue, Dec 29, 2015, at 06:38 PM, Kevin Ballard wrote:
> I'm proposing a new extension method on SequenceType called find().
> It's similar to CollectionType.indexOf() except it returns the
> element:
>
> extensionSequenceType {


> /// Returns the first element where `predicate` returns `true`,
> or `nil`


> /// if such value is not found.


> public func find(@noescape predicate: (Self.Generator.Element) throws
> -> Bool) rethrows -> Self.Generator.Element? {


> for elt in self {


> if try predicate(elt) {


> return elt


> }


> }


> return nil


> }


> }


>
> -Kevin Ballard
>
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