title: Symbols in Haskell
body: <p>I have a problem in understanding a symbol in Haskell:</p>
  
  <pre><code>=&lt;&lt;
  </code></pre>
  
  <p>as in:</p>
  
  <pre><code>-- return the last ten lines of a file
  tail10  = drop =&lt;&lt; subtract 10 . length
  </code></pre>
  
  <p>can anyone explain to me what this means? </p>
  
  <p>Also I find this happens alot when I'm studying Haskell is that i bump into one of these symbols I have no idea what they mean or how they work. Is there a site or a tutorial that goes into greater depth concerning only the symbols in Haskell rather than the functions themselves?</p>