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