Java 8 Streams Flatmap
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Java 8 Streams Flatmap
In java, to convert a 2d array into a 1d array, we can loop the 2d array and put all the elements into a new array; With java < 8 you would need two nested loops: Использование java 8's optional с stream::flatmap;
Among other aggregate operations, we have the map() and. In this tutorial, we will learn about java 8 stream flatmap method. The classic example for this one is applying touppercase() on every element.
Map() function produces one output for one input value, whereas flatmap() function produces an arbitrary no of values.
Streams represent a sequence of objects whereas optionals are classes that represent a value that can be present or absent. A map operation and a flatten operation. Использование java 8's optional с stream::flatmap; The classic example for this one is applying touppercase() on every element.
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