@robotlolita I liked your blog post, the only problem is calling it a "Validation monad" - you can't write a monad for it.
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@puffnfresh After all, we don't distinguish between concatenation and zipping by making different types of lists...
@nuttycom @puffnfresh one type class instance per type or surrender all coding privileges.
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@puffnfresh@nuttycom Control.Lens.Bijection - Show replies
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