title: How to replace capital letters between brackets using regex in Sublime Text 2?
body: <p>I need to edit a <code>bibtex</code> database with hundreds of entries. In fact what I need to do is to replace the capital letters between keys or brackets, such as: <code>{A}</code>. I have thousands of them. My first idea was search for <code>{{</code> incidences with <code>Ctrl + D</code> but this limits my search only to the initial incidences, and the other remain. </p>
  
  <p>My idea is to replace <code>{#}</code> (where # is a <em>wild-card</em> character that I use to abstractly represent any letter), simply for <code>#</code>; but since # could be any letter of the alphabet, I can't use <code>Ctrl + D</code> so simple. I know about regular expressions (Actually I know they exist, but not how they are used, I have never even used). I was looking for information about Sublime Text 2 to use but I found nothing basics enough for me.</p>
  
  <p>Could someone explain me how to do it, or show me some useful explanation of regular expressions for newbies?</p>