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If Stream Gatherers improve the solutions to your Advent of Code assignments please let me know 👍 #java #streams #AdventOfCode

Wrote my own mapWithIndex to improve Day 4 (github.com/mvitz/advent...) but wasn't exactly sure how to write a correct flatMapWithIndex.

To avoid the flatMap(identity) I guess you could do something akin to: gather(mapWithIndex(Pair::of)) .flatMap(p -> Arrays.stream(p.right().split(””)).gather(mapWithIndex((x, value) -> Pair.of(x, p.left()))).collect(…)

4/12/24, 11:30 pm0 reposts1 like

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