The SO question "What are the lesser known but useful data structures?" has a good list https://stackoverflow.com/questions/500607/what-are-the-lesser-known-bu

The SO question "What are the lesser known but useful data structures?" has a good list https://stackoverflow.com/questions/500607/what-are-the-lesser-known-but-useful-data-structures https://stackoverflow.com/questions/500607/what-are-the-less... [edit: the link above has been discussed on HN multiple times https://hn.algolia.com/?dateRange=all&page=0&prefix=false&query=stackoverflow.com%2Fquestions%2F500607&sort=byPopularity&type=story https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...]