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Return value of findIndex is Optional<Int>

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Cory Forsyth 2019-12-02 16:57:13 -05:00 committed by GitHub
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@ -904,7 +904,7 @@ 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 {