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