Материал из C\C++ эксперт
negators with find_if, not1, greater_equals
#include <algorithm>
#include <vector>
#include <iostream>
#include <functional>
using namespace std;
int main(int argc, char** argv)
{
int num;
vector<int> myVector;
myVector.push_back(1);
myVector.push_back(2);
myVector.push_back(3);
myVector.push_back(4);
vector<int>::iterator it = find_if(myVector.begin(), myVector.end(),not1(bind2nd(greater_equal<int>(), 1)));
if (it == myVector.end()) {
cout << "All perfect scores\n";
} else {
cout << "Found a \"less-than-perfect\" score of " << *it << endl;
}
return (0);
}Use not1() to reverse sort v
#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
using namespace std;
int main()
{
vector<char> v;
for(int i=0; i < 26; i++) v.push_back("A"+i);
// Use not2() to reverse sort v.
sort(v.begin(), v.end(), not2(less<char>()));
return 0;
}Use not2() to remove all characters that are not equal to H
#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
using namespace std;
int main(){
vector<char> v;
for(int i=0; i < 26; i++)
v.push_back("A"+i);
vector<char>::iterator res_end;
res_end = remove_if(v.begin(), v.end(),not1(bind2nd(equal_to<char>(), "H")));
return 0;
}
