Bubble Foundry

Ruby-style trailing conditionals in Scala

by Peter.

Ruby code often has code with trailing conditionals, which can look pretty neat.

person = Person.get(name) unless name.nil?

(Note: I really don’t know Ruby, I just saw syntax like this and thought was cool.)

So, of course I had to implement it in Scala:

You get optional values:

Pretty cool, no?

I tried and failed to come up with some sort of fancy extractor object that would let me use unless in pattern matching:

1001 match {
  case n unless n % 2 == 0 => println(n)

Can you figure out a way?