Dex (named for "index") is a research language for array processing in the Haskell/ML family. The goal of the project is to explore:

• Type systems for array programming
• Mathematical program transformations like differentiation and integration
• User-directed compilation to parallel hardware
• Interactive and incremental numerical programming and visualization

To learn more, check out our workshop paper or these example programs:

• Tutorial
• Dex prelude
• Mandelbrot set
• Estimating pi
• Sierpinsky triangle
• Basis function regression
• Brownian bridge
• MNIST nearest-neighbor classifier

Please note that Dex is an experimental research project at an early stage of development. We welcome contributions. There's plenty of work to do!

• Install stack
• Install LLVM 9, e.g. apt-get install llvm-9-dev on Ubuntu/Debian. On macOS, the best approach seems to be to build LLVM from source, as described here.

• Build Dex: make
• Run tests: make tests
• Set up alias (e.g. in .bashrc) alias dex="stack exec dex --"

• Traditional REPL: dex repl
• Execute script: dex script examples/tutorial.dx
• Notebook interface: dex web examples/tutorial.dx

BSD-3

This is an early-stage research project, not an official Google product.