I
data structures.
I especially love learning about real world use cases of data structures.
What’s your favorite data structure (bonus if it’s something you’ve coded in real life to solve a fun problem). 
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Replying to @copyconstruct
Probably a level-compressed suffix trie. It's so versatile. Implemented it a few times for CIDR matching in routing or ACL tables. Then used it for string matching - often faster than a hash table! Reverse a domain and you can use one for efficient SSL or DNS wildcards.
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Replying to @colmmacc @copyconstruct
Do you have any implementation pointers? Thanks.
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Replying to @ErrInDam @copyconstruct
here's a cool place to begin:https://fanf.livejournal.com/137283.html
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