Most common string value in group.

hesher

For this example data:<br />
<pre class='_prettyXprint _lang-auto _linenums:0'>Index, State, Food
1, CA, Hamburger
2, NY, Lettuce
3, CA, Cheese
4, NY, Lettuce
5, NY, Cheese
6, AR, Cheese</pre>
<br />
I would like to group by State and show the most common food for each state. So the result for the example should be:<br />
<br />
<pre class='_prettyXprint _lang-auto _linenums:0'>State, Popular Food
CA, Hamburger
NY, Lettuce
AR, Cheese</pre>
<br />
The problem is I can't find an aggregation that would return the most common string.<br />
There is the 'mode' function but it only works on integers.<br />
<br />
Am I missing Something?<br />
Thanks!