hash function for std::vector<int> needed

[Markus Dehmann]

Hi,

I'd like to hash std::vector<intobjects using hash_set, but I'm not
sure what hash function to use. Does anybody have a suggestion?

Thank you!
Markus

[alan]

On Nov 18, 10:23 am, Markus Dehmann <[e-mail]:

Hi,

I'd like to hash std::vector<intobjects using hash_set, but I'm not
sure what hash function to use. Does anybody have a suggestion?

Thank you!
Markus

Possibly you can use boost::hash_combine<intacross the vector
(warning, unchecked):
std::size_t vectorhash(std::vector<intf){
size_t seed = 0;
for_each(f.start(), f.end(), boost::bind(hash_combine<int>, seed,
_1));
return seed;
}

[Markus Dehmann]

On Nov 17, 9:47 pm, alan <[e-mail]:

On Nov 18, 10:23 am, Markus Dehmann <[e-mail]:

Hi,

I'd like to hash std::vector<intobjects using hash_set, but I'm not
sure what hash function to use. Does anybody have a suggestion?

Thank you!
Markus

Possibly you can use boost::hash_combine<intacross the vector
(warning, unchecked):
std::size_t vectorhash(std::vector<intf){
size_t seed = 0;
for_each(f.start(), f.end(), boost::bind(hash_combine<int>, seed,
_1));
return seed;

}

Perfect! Apparently it gets even easier. After reading this I googled
for hash_combine and found hash_range:

std::vector<std::stringsome_strings;
std::size_t hash = boost::hash_range(some_strings.begin(),
some_strings.end());

(http://www.boost.org/doc/html/hash/combine.html)

M.