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