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