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- JavaScript
- Python
- Elixir
- Ruby
- C
- C#
- Factor (Beta)
- CoffeeScript
- Crystal
- Julia (Beta)
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- TypeScript
- Scala
- Java
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- Go
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- COBOL (Beta)
- D (Beta)
- Lua
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- 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.