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- Haskell
- JavaScript
- Python
- Go
- Rust
- C#
- C++
- Swift
- CoffeeScript
- Ruby
- C
- Prolog (Beta)
- COBOL (Beta)
- Scala
- Java
- F#
- Elixir
- Crystal
- Julia (Beta)
- Groovy
- PHP
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- R (Beta)
- Kotlin
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- D (Beta)
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- Clojure
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- NASM
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- Racket
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- Objective-C (Beta)
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- Haxe (Beta)
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.