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- Ruby
- Crystal
- JavaScript
- Python
- C++
- C
- Java
- C#
- Haskell
- λ Calculus (Beta)
- COBOL (Beta)
- F#
- TypeScript
- CoffeeScript
- Swift
- Rust
- Go
- Julia (Beta)
- OCaml (Beta)
- NASM
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- Kotlin
- R (Beta)
- Scala
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- Clojure
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- Lua
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- Dart
- D (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.