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- Ruby
- Python
- JavaScript
- CoffeeScript
- Haskell
- Clojure
- C#
- Java
- Elixir
- C++
- PHP
- TypeScript
- Crystal
- F#
- C
- OCaml (Beta)
- Rust
- Swift
- Go
- R (Beta)
- Shell
- Kotlin
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- Julia (Beta)
- Scala
- Nim (Beta)
- Reason (Beta)
- Racket
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- Haxe (Beta)
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- D (Beta)
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- Groovy
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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.