title: Why do we need Deque data structures in the real world?
body: <p>Can anyone give me an example of situation where a <a href="https://en.wikipedia.org/wiki/Double-ended_queue" rel="noreferrer">Deque</a> data structure is needed?</p>
  
  <p><strong>Note -</strong> Please don't explain what a <code>deque</code> is?</p>