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