Love Ruby's 'puts' syntax? and hate typing console.log everytime you want to print something to the web-browser console from you Coffecript? Then use 'putsjs'. putsjs allows console logging statements to be written as puts statements and during asset compilation converts them into console.log statements in you coffeescript.
Gemfile gem 'putsjs', '~> 0.0.5'
install gem install putsjs -v 0.0.5