Tuesday, October 6, 2009

Coupling

A good design thrives for low coupling.
  • The lowest form of coupling is set of disconnected objects, which couldn't form a system. (Since, objects don't interact with each other.)
  • The highest form of coupling is Inheritance, which is one of the pillars of OOPS.

The answer for this irony can be "everything is a trade-off in software development". Principles are only guidelines and not rules.

An Anology: "Drive Slowly" is a common driving safety guideline. At the slowest speed (0 km/hr), the vehicle doesn't move. Also, people generally wants to buy a vehicle which gives maximum power and speed. Its a guideline to be applied pragmatically.


P.S: My another post which shows the legal violation of Command Query Separation Principle.

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