Map And Flatmap In Java
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Map And Flatmap In Java
There are two interfaces for implementing map in java: Map() is used for transformation only, but flatmap() is used for both transformation and flattening. Map and sortedmap, and three classes:
Flatmap is an intermediate operation. The stream flatmap() method is used to flatten a stream of collections to a stream of objects.the objects are combined from all the collections in the original stream. The map() function is used to transform a stream from one form to another while flatmap() function is a combination of map and flattening operations.
Map() is used for transformation only, but flatmap() is used for both transformation and flattening.
The actual difference is, map operation produces one output value for one input value but flatmap operation produces zero or more number of values for each input value. Or we can use the java 8 flatmap to flatten the 2d. The main difference between the map and flatmap is the return type. Those of the same name in the mono class work just the same way.
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