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