When you first get involved with agile development, you quickly hear about the SOLID principals and design patterns. They are a bit much to bite off at first. Through the Ruby community I have discovered a simpler more fundamental set of guidance for beginners that appear to be fundamentals for the higher level principals of SOLID, called the Four Rules of Simple Design:

  • Pass all tests
  • Clear, expressive & consistent
  • Duplicates no behavior or configuration
  • Minimal methods, classes & modules
Here is an [amazing introduction to the concept](http://www.jbrains.ca/permalink/the-four-elements-of-simple-design) by [JB Rains](http://www.jbrains.ca/).

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21 December 2011