Does Swift have a null coalescing operator and if not, what is an example of a custom operator?

Question

A common feature in many languages, the Null Coalescing Operator, is a binary operator often used to shorten expressions of the type:

x = possiblyNullValue N         


        

Answer 1

hope this will help you

1. yes , Now it is added in swift

2. little Explanation

          var anumber:Int? = someValue
          var banumber = 2
          anumber =   ( anumber != nil) ? anumber : banumber ------- (a)
          println(anumber!)
   

now instead of writing all (a) this we can just use this ->

        anumber = anumber ?? banumber

and

The operator can also be used multiple times in the same expression. like

     firstNumber ?? secondNumber ?? thirdNumber.