Javaslang
StreamEx
Javaslang | StreamEx | |
---|---|---|
8 | 2 | |
5,534 | 2,149 | |
0.5% | - | |
4.0 | 6.4 | |
4 months ago | 23 days ago | |
Java | Java | |
Apache License, Version 2.0 | Apache License 2.0 |
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For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Javaslang
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Can I use Scala if my teammates are using Java in a project?
If you want to cut down on code verbosity in Java, I recommend instead looking into using Java 17 (records), and/or the Vavr library (port of some Scala standard library approaches to Java). https://github.com/vavr-io/vavr
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Typeclasses explained in Java
If I managed to gain you interest you can take a look at one of the following libraries like cats, scalaz for scala and vavr for java which contain type class definitions and implementations for common types.
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What is your favourite Java specific feature that you miss in other languages?
I'm aware not everyone likes it, but vavr has these.
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Best Functional Library for Java ? And do you recommend going for a functional style in Java?
https://github.com/vavr-io/vavr/releases showed Vavr 0.10.4 from July 2021 as latest release. 🤷
- Examine why HashMap is slow (2015)
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Z: Point-free programming in Java
I would like to see a more fully-functional tool set available in Java itself. (Functors, Applicatives, Monads, Arrows, and more) Vavr is kind of doing that, but also kind of not really. Scala has all of that, and Scala is fun for sure, but it brings in a lot of baggage for interop. (Sometimes that's not a great choice, e.g. for an old legacy project)
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Your own custom Spring Data repository
Functional Programming is becoming more and more popular. Spring provides a couple of DSLs for the Kotlin language. For example, the Beans DSL and the Routes DSL allow for a more functional approach toward Spring configuration. On the type side, Vavr (previously Javaslang) is pretty popular in Java, while Kotlin has Arrow.
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Java 16 / JDK 16: General Availability
Or perhaps they could implement it like String. String has mutators but they don’t change the original value. To get the modified one, assign it to another variable. Another example is the collection framework of vavr.
StreamEx
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Favorite hidden gem library?
I really like StreamEx. I do not know why people do not use it often, the syntax is just wonderful.
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Jodd – The Unbearable Lightness of Java
It gets more perverse if you need to flatMap, or transmute components of map types, etc. If you want even more power, take a look at https://github.com/amaembo/streamex. This sort of container manipulation bread and butter for business processing. I use it every day, sometimes with a dozen operations. This (with liberal use of `final` values) makes for some pretty functional-looking code.
I'll grant you the Kotlin or Scala version is slightly more compact. But not fundamentally different, like the Go version.
I (and the pretty much every language designer in the post-Java era) disagree with you about checked exceptions, but that's a whole different thread...
What are some alternatives?
Functional Java - Backport of Java 8's lambda expressions to Java 7, 6 and 5
jOOλ - jOOλ - The Missing Parts in Java 8 jOOλ improves the JDK libraries in areas where the Expert Group's focus was elsewhere. It adds tuple support, function support, and a lot of additional functionality around sequential Streams. The JDK 8's main efforts (default methods, lambdas, and the Stream API) were focused around maintaining backwards compatibility and implementing a functional API for parallelism.
derive4j - Java 8 annotation processor and framework for deriving algebraic data types constructors, pattern-matching, folds, optics and typeclasses.
cyclops-react - An advanced, but easy to use, platform for writing functional applications in Java 8.
protonpack - Stream utilities for Java 8
λ - Functional patterns for Java
underscore-java - java port of Underscore.js
Fugue