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vector.find()
#include <algorithm>
#include <vector>
if ( std::find(vec.begin(), vec.end(), item) != vec.end() )
do_this();
else
do_that();
Source: stackoverflow.com
c++ find element in vector
auto it = find(vec.begin(),vec,end(), item)!
if(it != vec.end()){
int index = it - vec.begin();
}
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