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:https://stackoverflow.com/questions/26684562/whats-the-difference-between-map-and-flatmap-methods-in-java-8 [2]flatMap() Method in Java 8 :https://www.javatpoint.com/flatmap-method-in-java-8
这篇文章将讨论 Java 中 Stream 类的 map() 和 flatMap() 方法之间的区别。`map()` 和 `flatMap()` 都采用映射函数,该函数应用于 Stream 的每个元素
geeksforgeeks:Difference Between map() And flatMap() In Java Stream stackOverFlow:map vs flatMap in reactor
rxjava map flatmap区别 flatmap和map的区别 java,本文翻译自:What'sthedifferencebetweenmap()andflatMap()methodsinJava8?在Java8中,Stream.map()和Stream.flatMap()方法之间有什么区别?#1楼参考:https://stackoom.com/question/1nxsA/Java-中的map-和flatMap-方法有
http://stackoverflow.com/questions/22350722/can-someone-explain-to-me-the-difference-between-map-and-flatmap-and-what-is-a-g; http://spark.apache.org/docs/latest/programming-guide.html#transformations; http://blog.csdn.net/samhacker/article/details/41927567; ...
我理解是把一个数据执行一个方法,转换成另外一个数据。举个例子:mapper 函数把输入的字符串转换成大写。map()方法执行这个 mapper 函数。
我理解是把一个数据执行一个方法,转换成另外一个数据。举个例子:mapper 函数把输入的字符串转换成大写。map()方法执行这个 mapper 函数。
Among these abstractions, map() and flatMap() are two of the most frequently used higher-order functions. While they might seem similar at first glance, they serve different purposes and behave differently depending on the context. In this tutorial, let’s explore the difference between those ...
结果使用map()就返回了一个Optional<Optional<Integer>>嵌套结构的结果。这时候,使用flatMap()能带来不一样的效果: assertEquals(Optional.of(66),Optional.of(33).flatMap(i->Optional.of(i*2))); #2 Stream中的比较 这两个方法在Stream中的表现其实也是类似的。