Lessons from Zero-Defect Software
summary
Argues that combining mechanical refactorings, functional primitives, and cleanroom discipline produces fewer production defects: uses JetBrains PyCharm and Eclipse for extract-method refactorings (pulled a 150‑line block out of main), ports an old C sorter to Python, replaces loops with map/reduce to parse integers, and refactors a file‑truncate block into a verifiable function. Claims full zero‑defect proof is impractical but a distilled, review‑heavy workflow yields faster lifecycles and measurably fewer bugs.
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chapters (27)
- 0:00Introduction
- 0:34Jasons background
- 1:55Inspiration
- 2:13Refactoring
- 3:04Implementation
- 3:53Factoring
- 6:20Reshape
- 8:51Legacy Code
- 9:51Functional Programming
- 11:07Stateless
- 12:46Antipattern
- 13:36Avoid unnecessary parameters
- 15:12Map and Reduce
- 15:28Sample Code
- 18:34Composition
- 19:18Partials
- 19:53Checking for Time
- 20:03Boolean Parameters
- 20:33Clean Room Development
- 20:44ZeroDefect Approaches
- 21:47The Theory
- 22:30In Practice
- 24:29Limiting State
- 25:09Example
- 26:57Summary
- 27:26Other techniques
- 28:09Conclusion
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