Be symmetric while writing methods

When working with class or module sometimes you would need equal and opposite operations. The methods should be symmetric. Please make sure they are not added causally that would add non symmetric verbs.

Not symmetric

  • turnOn()/disable()
  • openConnection()/shutConnection()
  • increaseVolume()/turndownVolume()
  • push/remove

If you are adding symmetric methods, then make sure they feel symmetric one.


  • turnOn()/turnOff()
  • openConnection()/closeConnection()
  • readFile()/writeFile()
  • increaseVolume()/decreaseVolume()
  • activateAlarm()/deactivateAlarm()
  • push()/pop()

Dattatraya Kale

Aspiring agile software craftsman, clean code, polyglot, in love with different programming paradigm. I am on a never-ending journey towards mastery of software.

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