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- JavaScript
- C#
- Python
- Ruby
- Crystal
- Java
- Haskell
- Shell
- C++
- Clojure
- Julia (Beta)
- C
- COBOL (Beta)
- PHP
- CoffeeScript
- Elixir
- Go
- Dart
- Elm (Beta)
- Erlang (Beta)
- Factor (Beta)
- Forth (Beta)
- F#
- NASM
- Prolog (Beta)
- PureScript (Beta)
- R (Beta)
- Racket
- CFML (Beta)
- Fortran (Beta)
- Groovy
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- Objective-C (Beta)
- Reason (Beta)
- Rust
- TypeScript
- Kotlin
- Scala
- Lua
- Haxe (Beta)
- OCaml (Beta)
- D (Beta)
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.