title: Find the difference between two dates in hours?
body: <p>For example I can calculate the difference of these two dates by looking at them but i have no clue when it comes to calculating this in a program.</p>
  
  <p>Dates: A is <code>2014/02/12(y/m/d) 13:26:33</code> and B  is <code>2014/02/14(y/m/d) 11:35:06</code> then difference in hours is 46. </p>