C++ Tutorial/STL Algorithms Helper/not1

negators with find_if, not1, greater_equals

<source lang="cpp">#include <algorithm>

1. include <vector>
2. include <iostream>
3. 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);

}</source>

Use not1() to reverse sort v

<source lang="cpp">#include <iostream>

1. include <vector>
2. include <algorithm>
3. 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;

}</source>

Use not2() to remove all characters that are not equal to H

<source lang="cpp">#include <iostream>

1. include <vector>
2. include <algorithm>
3. 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;

}</source>