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