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How to find an item in an array using index(of:)

Written by Paul Hudson    @twostraws

The index(of:) method tells you the index of an element in an array if it exists, or returns nil otherwise. Because it's an optional value, you need to unwrap it carefully or at least check the result, like this:

let array = ["Apples", "Peaches", "Plums"]

if let index = array.index(of: "Peaches") {
    print("Found peaches at index \(index)")
}

Available from iOS 7.0

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