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- JavaScript
- C#
- Python
- Ruby
- Haskell
- Java
- C
- C++
- Rust
- PHP
- Julia (Beta)
- TypeScript
- PowerShell (Beta)
- Crystal
- Elixir
- F#
- Dart
- CoffeeScript
- Reason (Beta)
- Racket
- Prolog (Beta)
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- Clojure
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- D (Beta)
- Swift
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- Go
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- Perl (Beta)
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- Kotlin
- Factor (Beta)
- Lua
- λ Calculus (Beta)
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.