Types Code Diary Entries

This is part of the Semicolon&Sons Code Diary - consisting of lessons learned on the job.

Calling max or min on lists of type t that are empty gives another type
Do not trust the on screen representations of types since they may be more complex
Expect errors mixing numbers and strings
I prefix is used for interfaces
Static vs dynamic typing
Strong vs weak typing
Watch out for converting nil and empty string to numbers

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