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- JavaScript
- Python
- Ruby
- Crystal
- Java
- SQL
- Haskell
- CoffeeScript
- C#
- Elixir
- F#
- OCaml (Beta)
- PHP
- Swift
- C++
- Scala
- Kotlin
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- Rust
- Reason (Beta)
- Elm (Beta)
- Clojure
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- Dart
- Factor (Beta)
- Groovy
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- Racket
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- Lua
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- PowerShell (Beta)
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- NASM
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.