What is a good开发者_Go百科 C++ library for hash tables / hash maps similar to what java offers. I have worked with Google Sparsehash, but it has no support for collisions.
Use std::unordered_map (or unordered_multimap), which despite its name is a hash table - it will be part of the next C++ standard, and is available in most current C++ implementations. Do not use the classes with hash
in their names that your implementation may provide - they are not and will not be standard.
http://www.sgi.com/tech/stl/hash_multimap.html
or
std::tr1::unordered_multimap
In addition to those mentioned in other answers, you could try MCT's closed_hash_map
or linked_hash_map
. It is internally similar to Google SparseHash, but doesn't restrict values used and has some other functional advantages.
I'm not sure I understand what you mean by "no support for collisions", though. Both Google SparseHash and similarly implemented MCT of course handle collisions fine, though differently than Java's HashMap
.
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