title: Regex Split String on Delimiter
body: <p>My data is underscore-delimited like this for example:</p>
  
  <p><strong>A_B_C_D_E</strong></p>
  
  <p>Regex <strong>1</strong> I need to match: <strong>A__C_D_E</strong></p>
  
  <p>Regex <strong>2</strong> I need to match: <strong>A_B__D_E</strong></p>
  
  <p>Regex <strong>3</strong> I need to match: <strong>A_B_C__E</strong></p>
  
  <p>A little background on this.  I'll be replacing the regex matches with empty.string thus leaving me with the value of each column.  Example, regex 1 would leave me with the value B when the match is replaced by empty.string.  IMPORTANT:  ABCDE are all dyanmic data...they are not literally ABCDE.  The underscore delimiter is literal.  The number of "columns" delimited by this underscore is constant.</p>