The Startup
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The Startup

Don’t Don’t Repeat Yourself

Summary

  • “Don’t repeat yourself” (DRY) is a widely accepted programming principle, but it has several limitations
  • An alternative derivation of DRY is presented, that aims to alleviate some of these limitations
  • Programs are made up of functions, and to make functions maximally reusable they should:
    - Have the most lenient preconditions
    - Have the most strict postconditions
    - Perform the smallest amount of non-trivial work

If you think this article is too long, you can skip to Should I refactor my code

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Andrew Pritchard

Andrew Pritchard

The stories I write are a part of a learning journey through life, logic and programming. Share this journey with me.