c++ - Boost phoenix or lambda library problem: removing elements from a std::vector -

i ran problem thought boost::lambda or boost::phoenix solve, not able syntax right , did way. wanted remove elements in "strings" less length , not in container.

this first try:

std::vector<std::string> strings = getstrings(); std::set<std::string> others = getothers(); strings.erase(std::remove_if(strings.begin(), strings.end(), (_1.length() < 24 &&  others.find(_1) == others.end())), strings.end()); 

how ended doing this:

struct discard {     bool operator()(std::set<std::string> &cont, const std::string &s)     {         return cont.find(s) == cont.end() && s.length() < 24;     } };  lines.erase(std::remove_if( lines.begin(), lines.end(), boost::bind<bool>(discard(), old_samples, _1)), lines.end()); 

you need boost::labmda::bind lambda-ify function calls, example length < 24 part becomes:

bind(&string::length, _1) < 24 

edit

see "head geek"'s post why set::find tricky. got resolve correct set::find overload (so copied part), missed essential boost::ref() -- why comparison end() failed (the container copied).

int main() {   vector<string> strings = getstrings();   set<string> others = getothers();   set<string>::const_iterator (set<string>::*findfn)(const std::string&) const = &set<string>::find;   strings.erase(     remove_if(strings.begin(), strings.end(),         bind(&string::length, _1) < 24 &&         bind(findfn, boost::ref(others), _1) == others.end()       ), strings.end());   copy(strings.begin(), strings.end(), ostream_iterator<string>(cout, ", "));   return 0; }