RandomNumber.swift

RandomNumber.swift

public func arc4random <T: IntegerLiteralConvertible> (type: T.Type) -> T {
    var r: T = 0
    arc4random_buf(&r, UInt(sizeof(T)))
    return r
}
public extension Int {
    /**
     Create a random num Int
     :param: lower number Int
     :param: upper number Int
     :return: random number Int
     */
    public static func random (#lower: Int , upper: Int) -> Int {
        return lower + Int(arc4random_uniform(upper - lower + 1))
    }
    
}
public extension Double {
    /**
     Create a random num Double
     :param: lower number Double
     :param: upper number Double
     :return: random number Double
     */
    public static func random(#lower: Double, upper: Double) -> Double {
        let r = Double(arc4random(UInt64)) / Double(UInt64.max)
        return (r * (upper - lower)) + lower
    }
}
public extension Float {
    /**
     Create a random num Float
     :param: lower number Float
     :param: upper number Float
     :return: random number Float
     */
    public static func random(#lower: Float, upper: Float) -> Float {
        let r = Float(arc4random(UInt32)) / Float(UInt32.max)
        return (r * (upper - lower)) + lower
    }
}
/*
 **USE :**
 let randomNumDouble = Double.random(lower: 0.00, upper: 23.50)
 let randomNumInt = Int.random(lower: 56, upper: 992)
 let randomNumInt =Float.random(lower: 6.98, upper: 923.09)
 */