How to find out if an item is present in a std::vector?
c++, std, stdvector
Solution
You can use `std::find` from `<algorithm>`:
#include <algorithm>
#include <vector>
vector<int> vec;
//can have other data types instead of int but must same datatype as item
std::find(vec.begin(), vec.end(), item) != vec.end()
This returns an iterator to the first element found. If not present, it returns an iterator to one-past-the-end. With your example:
#include <algorithm>
#include <vector>
if ( std::find(vec.begin(), vec.end(), item) != vec.end() )
do_this();
else
do_that();
Problem
All I want to do is to check whether an element exists in the vector or not, so I can deal with each case. ``` if ( item_present ) do_this(); else do_that(); ```