Only talk to your friends, don’t talk to strangers | Law of demeter

Wikipedia explains Law of demeter or principle of least knowledge in such a nice manner

  • Each unit should have only limited knowledge about other units: only units “closely” related to the current unit.
  • Each unit should only talk to its friends; don’t talk to strangers.
  • Only talk to your immediate friends.

http://en.wikipedia.org/wiki/Law_of_Demeter

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