Nithin Bekal

Posts About Notes Slides

Coupling

Two or more things are ‘coupled’ if changes in on affects any of the others.

Orthogonality is the word used to describe decoupling or independence.

Advantages of Orthogonality

  • Isolation: bad design can be fixed before it spreads to other parts of the system.
  • Less fragile: problems caused by a change are restricted to a particular area
  • Better tested: isolated components are easier to test.
  • Avoid lock in: interfaces to 3rd party interfaces will be isolated, thereby avoiding lock in.

How to maintain orthogonality

  • Decoupled code: modules shouldn’t reveal anything unnecessary to other modules. They should also not rely on other modules’ implementation.
  • Avoid global data
  • Avoid similar functions

Links