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- JavaScript
- Ruby
- C#
- CoffeeScript
- Haskell
- Python
- Elixir
- C
- TypeScript
- PHP
- Java
- C++
- Lua
- Julia (Beta)
- Crystal
- Dart
- Clojure
- Racket
- Factor (Beta)
- Rust
- NASM
- Prolog (Beta)
- Swift
- R (Beta)
- OCaml (Beta)
- Scala
- Go
- Elm (Beta)
- Reason (Beta)
- Fortran (Beta)
- Kotlin
- CFML (Beta)
- COBOL (Beta)
- D (Beta)
- RISC-V (Beta)
- PureScript (Beta)
- F#
- λ Calculus (Beta)
- Groovy
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.