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