title: underscore.js - Determine if all values in an array of arrays match
body: <p>I have an array of arrays, which looks something like this:</p>
  
  <pre><code>[["Some string", "Some other string"],["Some third string", "some fourth string"]]
  </code></pre>
  
  <p>I think I can use the <code>_.all</code> method in <a href="http://documentcloud.github.com/underscore/#all" rel="noreferrer">Underscore</a> to determine if all of the arrays match 100% (that is all of their values match), but I'm not sure how to write the required iterator to run the check.</p>
  
  <p>Anyone have an idea?</p>