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- JavaScript
- Java
- C#
- Python
- Ruby
- C
- C++
- TypeScript
- Haskell
- Clojure
- Crystal
- Elixir
- PHP
- R (Beta)
- NASM
- Julia (Beta)
- Kotlin
- Go
- Scala
- CoffeeScript
- Rust
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- Pascal (Beta)
- Perl (Beta)
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- F#
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- Groovy
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.