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