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November 22, 2016 17:32
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easy random number function given a Range in Swift 3
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| import Foundation | |
| func random(_ r: ClosedRange<Int>) -> Int { | |
| let span = abs(r.upperBound-r.lowerBound) | |
| return Int(arc4random_uniform(UInt32(span)))+r.lowerBound | |
| } | |
| print(random(0...3)) // prints either 0, 1, 2, or 3 |
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