Tag · 2 pieces

#functional programming

GuideTechnology

13 min read

Streams in Practice (and When Not to Use Them)

How to process collections declaratively with Java Streams: filter, map, flatMap, sorted, reduce and collect, grouping and partitioning, why streams are lazy and single-use, what parallel streams really cost, and an honest guide to when a plain loop is the better choice.

GuideTechnology

12 min read

Lambdas, Functional Interfaces and Method References

How Java lets you pass behaviour as a value: lambda expressions, functional interfaces and the standard Predicate, Function, Consumer and Supplier, the four kinds of method reference, composing functions, why captured variables must be effectively final, and how lambdas replace the older anonymous classes.

Tagged #functional programming

Streams in Practice (and When Not to Use Them)

Lambdas, Functional Interfaces and Method References