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- JavaScript
- CoffeeScript
- Ruby
- Python
- Java
- Clojure
- Kotlin
- C#
- Crystal
- Julia (Beta)
- VB (Beta)
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- Scala
- Haskell
- C++
- Elixir
- R (Beta)
- Objective-C (Beta)
- PHP
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- F#
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- COBOL (Beta)
- C
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- D (Beta)
- Swift
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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.