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From: Tim Rentsch <tr.17687@z991.linuxsc.com>
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Subject: Re: What is visitor pattern?
Date: Sat, 26 Aug 2023 21:26:33 -0700
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Tiib <ootiib@hot.ee> writes:

> Double dispatch was first perhaps described by Dan Ingalls in
> seventies

Do you have a reference for that?

> in context of SmallTalk ... [...]

It's Smalltalk, not SmallTalk.