The summary of what three programmers learned from spending a week with Kent Beck:

• Values
  • Communication
  • Simplicity
  • Flexibility
• Key learnings
  • You ain’t gonna need it
  • Write high level tests to guide the development
  • Best practices for [Unit] testing
  • Focus!
• Misc
  • Parallel design (gradually replace an old design with a new one)
  • Resumable refactoring
  • Refactor on green, at will
  • Symmetry in the code: “Symmetry in code is where the same idea is expressed the same way everywhere it appears in the code.”

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