title: Find a value in an array of arrays
body: <p>I want to determine (using JQuery) if my <code>$(this).data</code> contains an array with a member=x.  <code>$(this).data</code> looks like this:</p>
  
  <pre><code>  'key1':[1,28,3,4],
    'key2':[5,6,7,8,9],
    'key3':[15,32]
  </code></pre>
  
  <p>Normally, I'd figure on looping through the keys and checking to see if each value array contained x, but JQuery has all these weird and wonderful functions, I thought there might be an easier way.</p>