Erlang vs Racket: What are the differences?

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1. **Concurrency Model**: Erlang is designed for building scalable and fault-tolerant systems with its built-in support for concurrency and distribution, while Racket focuses more on functional and imperative programming paradigms without as much emphasis on concurrency.
2. **Language Paradigm**: Erlang is a functional programming language with a focus on immutability and message passing, making it suitable for building resilient systems, whereas Racket is a multi-paradigm language that supports functional, imperative, and object-oriented programming styles.
3. **Community & Ecosystem**: Erlang has a smaller but highly specialized community focused on telecommunication and network applications, while Racket has a larger and diverse community with a broader range of applications including education, research, and software development.
4. **Syntax & Tooling**: Erlang has a prolog-inspired syntax with a strong emphasis on pattern matching and recursive functions, while Racket has a Lisp-inspired syntax with powerful macro systems and an extensive library of tools for various tasks.
5. **Static Typing**: Erlang is dynamically typed, allowing for flexible and rapid prototyping, whereas Racket supports both static and dynamic typing, providing developers with the option to choose based on project requirements.
6. **Platform Support**: Erlang is primarily used for building high-availability systems on the Erlang Virtual Machine (BEAM), while Racket can be compiled to run on various platforms including Windows, macOS, and Unix-based systems.

In Summary, Erlang and Racket differ in their concurrency model, language paradigm, community & ecosystem, syntax & tooling, static typing, and platform support.