Elm vs Racket: What are the differences?

## Key Differences Between Elm and Racket

1. **Type System**: Elm uses a strong static type system that enforces immutability and helps prevent runtime errors, while Racket provides a dynamic typing system allowing for more flexibility but potentially leading to runtime errors if not handled properly.
2. **Functional Paradigm**: Elm focuses on functional programming with pure functions and immutable data structures, promoting a more declarative approach, whereas Racket supports multiple programming paradigms including functional, procedural, and object-oriented programming styles.
3. **Tooling and Ecosystem**: Elm has a simpler tooling ecosystem with built-in support for package management and a strong emphasis on simplicity and ease of use, while Racket has a rich set of libraries and tools for various domains including web development, language design, and scientific computing.
4. **Syntax and Expressiveness**: Elm has a clean and concise syntax influenced by Haskell making it easy to read and write, whereas Racket allows for more expressive syntax due to its macro system, enabling developers to create domain-specific languages and customize the language semantics.
5. **Concurrency Model**: Elm uses an approach called the "Actor Model" for managing concurrency through isolated state and message passing, ensuring a reliable way to handle parallelism, whereas Racket provides multiple concurrency models such as threads, channels, and futures, allowing developers to choose the most suitable approach for their application.
6. **Community and Adoption**: Elm has a smaller but growing community focused on building robust web applications, while Racket has a more established community with a strong emphasis on language-oriented programming and academic research.

In Summary, Elm and Racket differ in their type systems, programming paradigms, tooling ecosystems, syntax, concurrency models, and community focuses. Each language has its strengths and is suited for different types of projects and developer preferences.