That's a long list, so probably not. Does Dart have an existential operator?[0]

    zip = lottery.drawWinner?().address?.zipcode

Hey look, I know they're not really comparable. They're solving different problems, are at different stages in maturity and have a different philosophy on how to do things. I also think that Hello World is probably the worst way to compare any two languages, but it's a fun exercise anyway

[0] example code from http://jashkenas.github.com/coffee-script

You can always import JS.Class: http://jsclass.jcoglan.com/

Which is > 300K before minification.