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- JavaScript
- CoffeeScript
- Ruby
- Python
- Haskell
- Java
- TypeScript
- C++
- PHP
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- Swift
- Elixir
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- R (Beta)
- Solidity (Beta)
- C
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- Lua
- Scala
- Kotlin
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- Go
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- Dart
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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.