title: Concatenate multiple selectors in less
body: <p>I'm trying to do this:</p>
  
  <pre><code>.a:concat(.b, .c, .d)
  </code></pre>
  
  <p>Expecting this result:</p>
  
  <pre><code>.a.b, .a.c, .a.d {}
  </code></pre>
  
  <p>Obviously this won't work since there isn't a function called concat in LESS. 
  Can we achieve this with something else?</p>
  
  <p>Thanks</p>