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  • can you give an example of how it works Commented Feb 8, 2015 at 17:53
  • I believe the answer contains the example. Did you mean an explanation? Commented Feb 8, 2015 at 18:01
  • yes please. could you ? Commented Feb 8, 2015 at 18:22
  • sure I've extended the answer with a brief explanation. Commented Feb 8, 2015 at 18:43