From Imperative to Functional
summary
Explains practical techniques for adopting functional programming while working in an existing imperative, mutable codebase. Describes incremental approaches and patterns (e.g., isolating pure functions, immutable data structures, minimizing side effects) and how to refactor code to move toward a more functional style without rewriting everything.
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chapters (17)
- 0:00Introduction
- 3:10Red thread project and unit tests
- 7:07Initial imperative implementation
- 8:31Side effects problem
- 9:35Avoiding side effects in Java
- 10:59Switching to functional paradigm
- 12:44Functional programming tools
- 15:34Java lambdas and closures
- 16:39Higher-order functions
- 19:11Eliminating side effects
- 21:42Currying and partial application
- 23:52Filter function and streams
- 28:55Final functional version
- 29:39Comparison with Haskell
- 35:41Paradigm shift
- 38:11Functional programming benefits
- 40:47Q&A
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