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- JavaScript
- Python
- Haskell
- CoffeeScript
- Ruby
- C#
- Java
- C
- Rust
- R (Beta)
- TypeScript
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- PHP
- C++
- Julia (Beta)
- Dart
- COBOL (Beta)
- Factor (Beta)
- OCaml (Beta)
- Clojure
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Start training on this collection. Each time you skip or complete a kata you will be taken to the next kata in the series. Once you cycle through the items in the collection you will revert back to your normal training routine.