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A comment on Elegant Error Handling with the JavaScript “Either” Monad. Parent comment

Re:Elegant Error Handling with the JavaScript “Either” Monad by jayshua on Wednesday June 19, 2019 @03:27PM (#20226515)
Left only shortcuts because of the implementation of the map function. There could just as easily be mapLeft and mapRight functions instead, allowing you to choose the shortcut behaviour.
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