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Frege is a purely functional programming language designed for the Java Virtual Machine (JVM), offering seamless interoperability with Java. Created by Ingo Wechsung, Frege closely resembles Haskell in syntax and concepts, utilizing features like pattern matching, higher-order functions, and type inference. It allows developers to write functional-style code while leveraging the vast ecosystem of existing Java libraries and frameworks.

In the JVM ecosystem, Frege competes with other languages such as Scala, Clojure, and Kotlin. Scala combines object-oriented and functional programming paradigms and has a strong community presence. Clojure emphasizes immutability and concurrency through its Lisp dialect. Kotlin provides functional programming features alongside object-oriented capabilities but is not purely functional like Frege. Each of these languages appeals to different developer preferences and project requirements due to their unique characteristics.

Frege's significant competitive advantage lies in its pure adherence to functional programming principles akin to Haskell, which appeals to developers focused on immutability, higher-order functions, and type inference. Its seamless interoperability with Java makes it advantageous for projects requiring integration with existing Java codebases while providing a robust foundation for creating reliable maintainable code. This combination of features positions Frege as an attractive choice for developers interested in leveraging the benefits of functional programming within the JVM environment that also retains access to familiar Java resources.

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