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- JavaScript
- C#
- Java
- CoffeeScript
- Python
- Elixir
- PHP
- Ruby
- C
- TypeScript
- Haskell
- Racket
- COBOL (Beta)
- Scala
- C++
- F#
- Swift
- Julia (Beta)
- R (Beta)
- Crystal
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- Factor (Beta)
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- Go
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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.