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