So, writing functions to visit your data structures is not "the Visitor pattern"... | Hacker News

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jrockway on Aug 7, 2010 | parent | context | favorite | on: Tim Daly on Lisp in Industry

So, writing functions to visit your data structures is not "the Visitor pattern"? That's exactly the point of my original post; Lisp thinks they invented everything and do everything in their own amazing way, when in reality, they solve the same problems the same way as everyone else.

_19qg on Aug 8, 2010 [–]

The Java Implementation of the visitor pattern involves interfaces and classes plus double dispatch.

All that has been replaced with one mapping.

Which was Tim's point.

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