Clean Code: Applying Object Oriented Principles
summary
Claim: most conditional switches belong in factories and can be removed by modeling behaviors as objects. Uses Ruby to refactor examples: a bird type string becomes AfricanSwallow and EuropeanSwallow classes; an arithmetic expression evaluator splits a monolithic Node into ValueNode, AdditionNode, MultiplicationNode plus a BinaryOp abstract class, eliminating all conditionals in evaluation and to_string while preserving results; a boolean verbose flag becomes StandardLogger vs VerboseLogger. Outcome: code is easier to test, extend (add unary sign node) and follows open/closed and SOLID principles.
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chapters (5)
- 0:00Replacing conditionals
- 1:54Simple object refactoring
- 3:45Tree modeling for logic
- 15:13Polymorphic logging
- 19:06Q&A and closing thoughts
