Ptt 大爆卦 | Java8 flatMap - 前往 https://stackoverflow.com/questions/74441711/why-does-flatmap-take-in-a-function-that-returns-stream-instead-of-collection

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Why does flatMap take in a function that returns stream ...

// Java 8 source code example: Stream<String> words = lines.flatMap(line -> Stream.of(line.split(" +")));. What are the use cases ...

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