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- JavaScript
- Ruby
- Python
- Haskell
- C#
- Java
- Elixir
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- C
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- Crystal
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- Factor (Beta)
- Go
- Julia (Beta)
- Dart
- Lua
- COBOL (Beta)
- PHP
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- Objective-C (Beta)
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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.