title: How do I program using cat?
body: <p>In this <a href="http://xkcd.com/378/" rel="nofollow noreferrer">xkcd comic</a>:
  <img src="https://imgs.xkcd.com/comics/real_programmers.png" alt="Real Programmers" title="Real programmers set the universal constants at the start such that the universe evolves to contain the disk with the data they want."></p>
  
  <p>they mention that real programmers use <code>cat</code>. Well, I was asking myself: how could you program using the <code>cat</code> command?</p>