Randomness

Random.swift

protocol Randomizable {
    static func random() -> Self
}

protocol IntervalRandomizable: Randomizable, Comparable {
    static func random(interval: HalfOpenInterval<Self>) -> Self
    static func random(interval: ClosedInterval<Self>) -> Self
}

extension CGFloat: Randomizable {
    static func random() -> CGFloat {
        return CGFloat(arc4random() % 100) / 100
    }
}

extension UIColor: Randomizable {
    static func random() -> Self {
        return self(red: CGFloat.random(), green: CGFloat.random(), blue: CGFloat.random(), alpha: 1)
    }
}