title: Replace white space with AND in ruby
body: <p>I have someone entering a form with some string input.  What I need to do is replace any white space in the string with " AND " (no quotes).  What's the best way to do this?</p>
  
  <p>Also, how would I go about doing this if I wanted to remove all the whitespace in the string? </p>
  
  <p>Thanks</p>