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Created January 18, 2013 23:02
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solid object oriented oop
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solid.md

#SOLID

  • S SRP Single responsibility principle, an object should have only a single responsibility.
  • O OCP Open/closed principle, “software entities … should be open for extension, but closed for modification”.
  • L LSP Liskov substitution principle, “objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program”. See also design by contract.
  • I ISP Interface segregation principle, “many client-specific interfaces are better than one general-purpose interface.”
  • D DIP Dependency inversion principle, one should “Depend upon Abstractions. Do not depend upon concretions.” Dependency injection is one method of following this principle.

see http://en.wikipedia.org/wiki/SOLID_(object-oriented_design)

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