Ruby 2 JavaScript

CoffeeScript

CoffeeScript is a programming language that transcompiles to JavaScript. It adds syntactic sugar inspired by Ruby, Python and Haskell in an effort to enhance JavaScript's brevity and readability.

Quick CoffeeScript Review

Here a quick how to if CoffeeScript in general

• Install CoffeScript lib

  npm install -g coffee-script

• For live conversion

  coffee --watch --compile script.coffee

Ruby CoffeScript gem

Ruby CoffeeScript gem is a bridge to the official CoffeeScript compiler.

• Install CoffeeScript gem

  gem install coffee-script

• Convert CoffeeScript file to JavaScript

#!/usr/bin/env ruby
require 'coffee-script'
if ARGF
  file = File.open("#{ARGV[0]}.js", 'a')
  file.write CoffeeScript.compile(ARGF.read)
end

Run it

ruby coffee2js.rb exploit.coffee

Opal

Opal is a Ruby to JavaScript source-to-source compiler. It also has an implementation of the Ruby corelib.

• Install Opal gem

  gem install opal opal-jquery

[5]: http://js2.coffee/