title: Instantiate a CoffeeScript class from a class name in a string
body: <p>How do I instantiate a class in CoffeeScript when I only have the name of the class in a string?</p>
  
  <pre><code>class Dog
    bark:-&gt;
      "Woof"
  
  className = "Dog"
  dog = new className  # &lt;--- I would like to create an instance here using the string
  </code></pre>