Int+Extension.swift

extension Int {
    func toString() -> String {
        return "\(self)"
    }

    func toObjCString() -> NSString {
        return NSString(format: "%d", self)
    }

    func toDouble() -> Double {
        return Double(self)
    }
    
    func postiveValue() -> Int {
        return (self > 0) ? self : 0
    }
}