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History of yin yang symbol2/19/2023 ![]() Without the lambda operation) that is specially designed for ``Unlambda'', essentially, an implementation of the lambda calculus (If you want the full story, I was inventing a language (called (yang ((lambda (foo) (write-char #\*) foo) (let* ((yin ((lambda (foo) (newline) foo) I sumbled (accidentally as it were) upon the following Scheme program: Since the original puzzle is in Scheme, I assume it is a Scheme user group.Ĭan any one show more historical detail on this? It is appear to be the case that this puzzle was well-known in 2009 at least in some society. Now I lost all clues to track back the history before 2009. The wikipedia article history shows the original yin-yang puzzle was added in 2009 by a registered user without any citation.This means the wikipedia article was updated after the first question being asked.This web blog refers to the first stack overflow question. ![]() Unfortunately he closed his blog but it is available in Web Archive, as at 7.The current version of this page referred to Yin Wang's web blog.The first question was posted in 2010 and refers to a wikipedia page.I was wondering when and who find this beautiful programming pearl. (there could be something I didn't find yet) How does the yin yang puzzle work? (I assume this is the first one).There are quite a few questions about the "yin-yang puzzle" already in Stackoverflow:
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