What is the replacement for isDigit() for characters in Swift?

Question

As mentioned in this post, before Xcode 6 Beta 4, one could use c.isDigit() and c.isAlpha() to find if c : Character was a digit or al

Answer 1

I have create mine var to check whether character is number or not.

var isNumber : Bool {
    get{
        return !self.isEmpty && self.rangeOfCharacter(from: CharacterSet.decimalDigits.inverted) == nil
    }
}

// Use

var initial = "1"
if let isNum = initial.isNumber, isNum { // true
    initial = "#"
}