title: ruby number to human-readable string conversion
body: <p>I need to have a list with id's for each list item being <code>#one</code>, <code>#two</code> etc.
  Is this the most efficient way or am I missing an in built ruby function here?</p>
  
  <pre><code>-num_array = ["one", "two", "three", "four", "five", "six", "seven"]
  -navigation[:primary_level].each_with_index do |primary_item, idx|
     %li{ :id =&gt; "#{num_array[idx]}"}
  </code></pre>