Regarding Lenses, Prisms and Optics

1. jackson

   1 1 192 10.0 Java

   

   If you have a lot of instanceof checks and casting, then you should consider having your base class (Term) define all methods that all sub classes implement, which by default do nothing and/or return sensible values (which could be an Optional or a "null object"). For example, Jackson does this for its JSON tree structure and its base class JsonNode.

2. InfluxDB

   www.influxdata.com featured

   InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.

   

3. frege

   2 9 3,661 2.4 Frege

   Frege is a Haskell for the JVM. It brings purely functional programing to the Java platform.

   

   Or just go full on functional. There are several JVM based Haskell languages, e.g. Eta and Frege.

4. kotlin

   3 226 50,950 10.0 Kotlin

   The Kotlin Programming Language.

   

   Another option could be to check out Kotlin. It's a JVM language that while still object-oriented has may functional syntax features.

5. eta

   4 7 2,621 0.0 Haskell

   The Eta Programming Language, a dialect of Haskell on the JVM

   

   Or just go full on functional. There are several JVM based Haskell languages, e.g. Eta and Frege.

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