title: Accessing a class's constants
body: <p>When I have the following:</p>
  
  <pre><code>class Foo
     CONSTANT_NAME = ["a", "b", "c"]
  
    ...
  end
  </code></pre>
  
  <p>Is there a way to access with <code>Foo::CONSTANT_NAME</code> or do I have to make a class method to access the value?  </p>