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- JavaScript
- Python
- Ruby
- C
- Haskell
- PHP
- C++
- R (Beta)
- Scala
- Julia (Beta)
- COBOL (Beta)
- C#
- Java
- NASM
- Rust
- CoffeeScript
- Elixir
- Clojure
- Kotlin
- TypeScript
- Go
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- BF (Beta)
- F#
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- PowerShell (Beta)
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- Racket
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- Dart
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- Lua
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- SQL
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.