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- JavaScript
- Python
- Ruby
- C#
- CoffeeScript
- Java
- Elixir
- C
- Rust
- Scala
- TypeScript
- PHP
- Haskell
- C++
- F#
- Swift
- Crystal
- Objective-C (Beta)
- COBOL (Beta)
- Julia (Beta)
- Go
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- Groovy
- Clojure
- Lua
- OCaml (Beta)
- Reason (Beta)
- VB (Beta)
- Racket
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- R (Beta)
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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.