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> Would be good to see them re-purpose that good information (like this particular entry) into a useful format.

Like cough Wikipedia? Most of the entries on that page are links to a Wikipedia article with a one-paragraph summary. Seems like anything missing from the canonical list should just be added:

http://en.wikipedia.org/wiki/List_of_data_structures

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Wikipedia is a good place for information about different data structures, but the question here is "What are the lesser known but cool data structures. There are tons of obscure data structures, but only a few that people would consider cool. Wikipedia cannot and should not show that information, because it's inherently subjective.

StackOverflow cannot show that information either, because it's inherently subjective!

"What are some data structures not found on Wikipedia" is an objective question (but time-bound, which violates an SO policy)

Wikipedia was my first thought, but it's more encyclopedia oriented (naturally).

I was thinking something more along the lines of what they did with Scala:

http://stackoverflow.com/tags/scala/info

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