title: bash: Inverse (ie. NOT) shell wildcard expansion?
body: <p>Is there a way of handling invers bash v4 shell expansion, ie. treat all files NOT like a wildcard? I need to <code>rm</code> all files that are not of the format <code>'Folder-???'</code> in this case and was wondering if there is a shorter (ie. built-in) way then doing a</p>
  
  <pre><code>for file in *
  do
    [[ $i =~ \Folder-...\ ]] &amp;&amp; rm '$i'
  done
  </code></pre>
  
  <p>loop. (the example doesn't work, btw...)</p>
  
  <p>Just out of bash learning curiosity...</p>