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