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- JavaScript
- CoffeeScript
- Ruby
- Haskell
- Python
- C#
- C++
- Java
- Elixir
- R (Beta)
- Objective-C (Beta)
- PHP
- Go
- PowerShell (Beta)
- Julia (Beta)
- Kotlin
- Scala
- F#
- Factor (Beta)
- Lua
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- COBOL (Beta)
- Crystal
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- Nim (Beta)
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- Swift
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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.