title: Mark Duplicate Entries in Google Spreadsheet
body: <p>I have a spreadsheet with entries in column F that could be duplicates later on in F. I'm looking to make something that does something like this pseudocode: </p>
  
  <p><code>While Ax is not empty</code></p>
  
  <pre><code>If value in Gx is empty   
    If cell Ex is identical to other cell Ey
    OR 
    If cell Fx is identical to other cell Fy 
       THEN
         Mark Gy as duplicate
         italics row y
  </code></pre>
  
  <p>Any recommendations on making this work using Google's built in app scripting? </p>
  
  <p>Disclaimer: I'm not familiar with JS but I'm trying.</p>