Simple math CoffeeScript example translated to Javascript.

simple_math.coffee

# Creative Commons Attribution-Share Alike 3.0 United States License
# http://creativecommons.org/licenses/by-sa/3.0/us/
# By Susan Potter <http://geek.susanpotter.net>
(() ->
  window: this
  window.SimpleMath: {
    square: (x) ->
      x*x
    cube: (x) ->
      x*x*x
    even: (x) ->
      !(x%2)
    odd: (x) ->
      !!(x%2)
  }
)()

SimpleMath.square(7) # => 49
SimpleMath.cube(7)   # => 343
SimpleMath.even(7)   # => false
SimpleMath.odd(7)    # => true

simple_math.js

// Creative Commons Attribution-Share Alike 3.0 United States License
// http://creativecommons.org/licenses/by-sa/3.0/us/
// Generated from CoffeeScript translator of previous CS code.
(function() {
  var window;
  window = this;
  window.SimpleMath = {
    square: function square(x) {
      return x * x;
    },
    cube: function cube(x) {
      return x * x * x;
    },
    even: function even(x) {
      return !(x % 2);
    },
    odd: function odd(x) {
      return !!(x % 2);
    }
  };
  return window.SimpleMath;
})();
SimpleMath.square(7);
// => 49
SimpleMath.cube(7);
// => 343
SimpleMath.even(7);
// => false
SimpleMath.odd(7);
// => true