This is very cool, though I personally find postfix flow control confusing to re...

jashkenas · on April 19, 2012

Agreed. I think there's a bit of LOC-golfing at work here. That loop is more nicely written as:

    for {handler, context} in @events[topic]
      handler.apply context, args

MatthewPhillips · on April 19, 2012

I agree. I also find unless statements to be difficult to read. I use this pattern all of the time in my JavaScript:

  if(!foo) {
    maybeDoSomething();

    return;
  }

  bar();

This lets me early exit, if needed, while letting the meat of the function not suffer from unnecessary indentation.

The unless statement makes the early exit seem like the default action rather than the exceptional action it (hopefully) is.