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- JavaScript
- Ruby
- Python
- Java
- C#
- CoffeeScript
- OCaml (Beta)
- C++
- Scala
- PHP
- C
- D (Beta)
- Rust
- Go
- Haskell
- Clojure
- Elixir
- COBOL (Beta)
- λ Calculus (Beta)
- Factor (Beta)
- Lua
- Groovy
- Swift
- TypeScript
- Prolog (Beta)
- Crystal
- Kotlin
- CFML (Beta)
- Julia (Beta)
- R (Beta)
- Shell
- NASM
- Nim (Beta)
- PureScript (Beta)
- Racket
- Dart
- Forth (Beta)
- VB (Beta)
- SQL
- Elm (Beta)
- Perl (Beta)
- Pascal (Beta)
- F#
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.