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- Ruby
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- CoffeeScript
- Java
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- Clojure
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- C
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- Rust
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- R (Beta)
- Shell
- Objective-C (Beta)
- OCaml (Beta)
- Julia (Beta)
- Scala
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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.