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- JavaScript
- CoffeeScript
- Ruby
- Python
- Dart
- PHP
- C#
- Java
- Nim (Beta)
- Haskell
- Rust
- Groovy
- Scala
- C++
- Go
- Racket
- TypeScript
- R (Beta)
- Prolog (Beta)
- NASM
- Swift
- CFML (Beta)
- Julia (Beta)
- Elixir
- Crystal
- Perl (Beta)
- COBOL (Beta)
- C
- D (Beta)
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- SQL
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- F#
- Lua
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- Clojure
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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.