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Merge pull request #3788 from bantic/patch-1

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[swift/en] Return value of `findIndex` is `Optional<Int>`
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Divay Prakash 2020-01-24 20:32:12 +05:30 committed by GitHub
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@ -909,7 +909,7 @@ func findIndex<T: Equatable>(array: [T], valueToFind: T) -> Int? {
}
return nil
}
findIndex(array: [1, 2, 3, 4], valueToFind: 3) // 2
findIndex(array: [1, 2, 3, 4], valueToFind: 3) // Optional(2)
// You can extend types with generics as well
extension Array where Array.Element == Int {