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- JavaScript
- Python
- Ruby
- C#
- Haskell
- Java
- Clojure
- CoffeeScript
- PHP
- C++
- Elixir
- Julia (Beta)
- TypeScript
- R (Beta)
- Crystal
- COBOL (Beta)
- C
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- Rust
- Factor (Beta)
- Dart
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- Objective-C (Beta)
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- NASM
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- Swift
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- Racket
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- F#
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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.