July 2023
Intermediate to advanced
276 pages
6h 55m
English
Content preview from Functional Programming in Java, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Teeing Operations
In almost all the examples we’ve seen in this chapter, we converted a collection into either a single value or another collection. The only exception to this so far was the partitioningBy function that produced two separate collections. That’s powerful but limited to giving us a collection that satisfies a given criteria and another that doesn’t. What if we want to take this idea of producing two different results from one iteration, but the results aren’t directly related to each other or mutually exclusive.
The teeing function creates a Collector that will apply two different transformations on the data that flows through and finally merges the two results into one cumulative result.
Suppose we want to get the full name of ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.