Nil coalescing assignment | A nifty Swift addition

Just a little thing, but then again its the little things that can make life worth while.... especially as a programmer.

So, how often do you find yourself writing code like:

if str == nil { str = "Some text" }

Or the slightly better looking:

str = str ?? "Some text"

But I think it should be still shorter, what about:

str ??= "Some text"

Well, turns out that is quite possible in Swift with the following:

infix operator ??= {}

func ??=<T> (inout lhs: T?, rhs: T) {

    if lhs == nil { lhs = rhs }

}

Just include the above lines in your project, and you're set.

Happy coding...

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