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