title: Regex substitution with Notepad++
body: <p>I have a text file with several lines like these ones:</p>
  
  <pre><code>cd_cod_bus
  nm_number_ex
  cd_goal
  </code></pre>
  
  <p>And I want to get rid of the <code>-</code> and uppercase the following character using Notepad++ (I can also use other tool but if it doesn't get the problem more troublesome).</p>
  
  <p>So I tried to get the characters with the following regex <code>(?&lt;=_)\w</code> and replace it using <code>\U\1\E\2</code> for the uppercasing trick but here is where my problems came. I think the regex is OK but once I click replace all I get this result:</p>
  
  <pre><code>cd_od_us
  nm_umber_x
  cd_oal
  </code></pre>
  
  <p>as you can see it is only deleting the match.</p>
  
  <p>Do you know where the problem is?</p>
  
  <p>Thanks.</p>