title: Angular.js - using NG-Grid, how to get the length of value inside cell. Nothing seems to work
body: <p>I am new to Angular and NG-Grid and trying desperately at a new company to get up to speed on it.
  Using NG-grid for Anugular.js is there a way to format a cell using custom cell template if a cell contains more than x number of characters. I've search the web and their API and examples but cannot find an answer to this one. For instance if a cell has more than 40 characters make the background of that cell red.  It doesn't seem to like the .length() function for  comparison some reason.</p>
  
  <p>This works great:
      <pre>{green: row.getProperty(col.field) > 30}></pre></p>
  
  <p>But this doesn't 
      <pre>{green: row.getProperty(col.field).length() &lt; 40}></pre>
  AM I using the .length function wrong here or can it even be used inside ng-grid cells?
  How do you get the length of the value inside a cell?</p>
  
  <p>Here is a basic PLNKR based on their simple example.
  <a href="http://plnkr.co/edit/fCUpoZ81vxFgt9sBHznz" rel="nofollow">http://plnkr.co/edit/fCUpoZ81vxFgt9sBHznz</a></p>
  
  <p>Thanks</p>