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shuffle array (self)
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| mutating func shuffle() { | |
| if count < 2 { return } | |
| for i in 0..<(count - 1) { | |
| let j = Int(arc4random_uniform(UInt32(count - i))) + i | |
| swap(&self[i], &self[j]) | |
| } | |
| } | |
| var tags = [1,7782,25] | |
| tags.shuffle() |
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