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- Ruby
- Python
- JavaScript
- Haskell
- C#
- Java
- CoffeeScript
- Clojure
- TypeScript
- C++
- PHP
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- F#
- C
- Rust
- Swift
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- R (Beta)
- Shell
- OCaml (Beta)
- Fortran (Beta)
- Elixir
- Julia (Beta)
- Scala
- PowerShell (Beta)
- Nim (Beta)
- Reason (Beta)
- Racket
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- NASM
- D (Beta)
- Lua
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- Dart
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- Solidity (Beta)
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- SQL
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.