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Parse, don’t validate (lexi-lambda.github.io)

submitted 9 months ago by bugsmith@programming.dev to c/programming@programming.dev

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[–] bugsmith@programming.dev 12 points 9 months ago

Yes! The concepts are intertwined. I think the key take away, for me, is to lean heavily into your type system and allow that to do some of the heavy lifting. Accept that something like a username is not a string, but a subtype of a string (this has to be true if any validation is required, otherwise you'd just accept any valid string).