Java streams
Process collections declaratively with the Stream API: creating streams, filter, map and sorted, collecting to lists, maps and groups, reducing, primitive streams, Optional results, laziness, and the mistakes that make streams slow or wrong.
CodexBash, , 4 min read
Since Java 8, the Stream API lets you describe what to do with a collection, filter these, transform those, group by this, rather than writing the loop that does it. Done well, stream code reads like a sentence describing the result. Done badly, it hides bugs and costs performance. This article covers the operations you will use daily and the habits that keep streams clear.
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