Ternary Operator Similar To ?:

From Tony Morris’ Lambda Blog:

I hear this question a lot. Yes it does. Instead of c ? p : q, it is
written if(c) p else q.

This may not be preferable. Perhaps you’d like to write it using the
same syntax as Java. Sadly, you can’t. This is because : is not a
valid identifier. Fear not, | is! Would you settle for this?

c ? p | q

Then you’ll need the following code. Notice the call-by-name (=>)
annotations on the arguments. This evaluation strategy is required to
correctly rewrite Java’s ternary operator. This cannot be done in Java
itself.

case class Bool(b: Boolean) {   
  def ?[X](t: => X) = new {
    def |(f: => X) = if(b) t else f   
  } 
}

object Bool {   
  implicit def BooleanBool(b: Boolean) = Bool(b) 
}

Here is an example using the new operator that we just defined:

object T {   val condition = true

  import Bool._

  // yay!   
  val x = condition ? "yes" | "no"
}

Have fun 😉