Re: Using unique with std::map

Vitaly Perlin <>
Thu, 27 Mar 2008 23:09:22 CST
On Mar 27, 1:01 pm, Carl Barron <> wrote:

If you want a collection of pairs with unique first and second values
then perhaps a std::set<std::pair<int,std::string> > is more
as it won't store duplicate entries so it would only contain
    pair(1,"aaa") and pair(2,"bbb"). Pair(3,"aaa") would not be inserted.

const char *text[] = {"aaa","bbb","aaa",0};
std::set<std::pair<int,std::string> > s;
const char **p = text;

for(int i=0;*p;++i,++p)



Thanks, but the code above will store all 3 pairs in the set, since
pair(1,"aaa") != pair(3,"aaa").

Actually I started with std::set<std::string> as to store unique
values, but then I realized that I want to retain the keys as well,
hence I came up to std::pair<std::string, std::vector<int> >

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