This post is part of the 2019 F# Advent Calendar. Check out all the other great posts there! And special thanks to Sergey Tihon for organizing this. Six and half years ago, I wrote a post and did a talk on what I called âRailway Oriented Programmingâ. It was a way for me to explain to myself and others how to use Result/Either to for chaining together error-generating functions. To my surprise, th

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