Refactoring to Functional Style
summary
Argues that refactoring Java imperative code to Java 8 functional style produces clearer, shorter code and enables lazy infinite streams and better reuse. Shows concrete rewrites: prime test using IntStream.range + noneMatch, line counting with Files.lines + filter + count, grouping with Collectors.groupingBy, Pythagorean triples via Stream.iterate + flatMap, and summing K prime square roots with filter(mapToDouble(limit(sum))). Demonstrations compile and produce identical results while removing loop variables and accidental complexity.
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chapters (8)
- 0:00Introduction
- 8:38Functional Style
- 13:51Accidental Complexity
- 18:48Functions
- 21:49Example
- 27:56Flat Map
- 32:38Coding
- 39:13Summary
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