title: Is there any haskell function to concatenate list with separator?
body: <p>Is there a function to concatenate elements of a list with a separator?
  For example:</p>
  
  <pre><code>&gt; foobar " " ["is","there","such","a","function","?"]
  ["is there such a function ?"]
  </code></pre>
  
  <p>Thanks for any reply!</p>