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- Ruby
- Python
- JavaScript
- CoffeeScript
- Java
- C#
- Haskell
- Clojure
- C++
- PHP
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- C
- Crystal
- Rust
- Swift
- R (Beta)
- Shell
- Objective-C (Beta)
- OCaml (Beta)
- Scala
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- Go
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- NASM
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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.