Learning To Code In Functional Style with Java
summary
Argues functional style cuts accidental complexity by using filter map reduce and Java streams; shows concrete code (list 1–10, filter evens, map x2, reduce gives 60) and a “first even >3 doubled” example that imperative does 8 steps while naïve counting makes the pipeline seem to do ~32, but lazy evaluation fuses steps so the stream performs only the needed work and returns the same results and can be switched to parallelStream for easy parallelism.
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chapters (7)
- 0:00Why functional style
- 7:58Declarative vs imperative
- 15:30Lambda expressions
- 20:45Filter map reduce
- 33:55Reduce operation explained
- 42:05Lazy evaluation benefits
- 50:25Streams and performance
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