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September 2, 2016 07:01
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Returns a random value from an array
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| extension Array { | |
| func randomValue() -> Element? { | |
| guard self.isEmpty == false else { | |
| return nil | |
| } | |
| let idx = Int(arc4random() % UInt32(count)) | |
| return self[idx] | |
| } | |
| } |
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