Hacker News Reader

Hmm they say the same thing about haml, however haml makes my life so much easier when writing views.

I will say that just like you should know HTML before using haml, you should know JavaScript before using CoffeeScript.

Ditto. They will say the same thing, you should know X before using Y. Example:

Objective-C -> MacRuby; Slim/HAML/Jade -> HTML; SASS/LESS -> CSS and so on...

I think you meant all the examples after the first around the other way.