Is there any reason coffeescript can't be extended to support the same thing without parentheses? That feels fairly natural to me since it's similar to the object literal syntax.

Edit: Couldn't find that this has ever been suggested before, so I created a github issue: https://github.com/jashkenas/coffee-script/issues/2307

Nice, got me thinkin and tried this:

  _.throttle ->
      console.log("Foo")
    , 500

And it works!