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ImJasonH
on July 22, 2022
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Ask HN: What are some cool but obscure data struct...
Nested Set Model: a way to model nested sets of entities and query them in a SQL database. I haven't used it for anything but it seems fun.
https://en.m.wikipedia.org/wiki/Nested_set_model
NicoJuicy
on July 22, 2022
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Used it for tag hierarchy, liked it a lot!
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Search:
https://en.m.wikipedia.org/wiki/Nested_set_model