In the next version of Ruby I'd like to be able to have @number in this:

# ... in a class instance ...
@number = 1
# ...

def foo(number = 2)
  @number =|| number
end

evaluate to this:

foo
=> 2

This is nice when you want to override a class instance variable only if a non-null argument is passed. Otherwise, I commonly have to do assignments like this:

def foo(number = 2)
  @number = number || @number
end

Uuugly.  What say you?