问题
I want to implement an OPMPH function for the words in a dictionary in C++. How do I do it?
Thanks!
回答1:
Have you looked at these papers?
- http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.84.4018&rep=rep1&type=pdf
- http://dx.doi.org/10.1016/0020-0190(92)90220-P (the short form link that leads to a very long link at http://www.sciencedirect.com/)
- http://eprints.cs.vt.edu/archive/00000248/01/TR-91-01.pdf
回答2:
Limit your word length to 6 letters or less and you might be able to make it work. Not very practical.
回答3:
If you need alphabetical order use a Trie or a DAWG (like I recommended in your last question). For an order besides alphabetic I would use a binary tree (std::map in C++ is implemented with a red-black tree usually).
Implementing an order preserving hash container sounds like the mother of all early optimizations.
来源：https://stackoverflow.com/questions/1959438/order-preserving-minimal-perfect-hash-functions