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While we're talking about this conference, rich hickey just changed how I think about domain modelling forever with this talk, released about an hour ago: https://m.youtube.com/watch?v=YR5WdGrpoug

Strongly recommend a watch particularly if you're modelling something in a typed language

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I was thinking of the exact same thing when writing my new project in Python, and implemented a poor-man's version using typing.NamedTuple. But my idea was mainly from the extensive records from Elm. Although Elm also have Maybe, but the idioms of "making impossible things unrepresentative" eliminates a lot of unwanted usage.

Agreed, just finished watching, and that's an amazing talk.

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