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kotlinlang

I <https://github.com/kyay10/kova/tree/arrow|had some fun over the weekend> refactoring <https://github.com/komapper/kova|Kova>, a validation library, to use Arrow. It ended with rewriting the library into direct style (i.e. the library originally lets you combine Validators and pass them around as first-class objects, while the refactoring instead shifts the focus onto validation functions).
It's a nice case study for how `RaiseAccumulate` plays out in a real-world project!