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- JavaScript
- Ruby
- Python
- C
- Rust
- Dart
- Scala
- CoffeeScript
- Haskell
- C++
- Prolog (Beta)
- C#
- PowerShell (Beta)
- Java
- Clojure
- Swift
- Go
- Elixir
- COBOL (Beta)
- λ Calculus (Beta)
- Kotlin
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- Factor (Beta)
- TypeScript
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- R (Beta)
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- Crystal
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- Racket
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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.