Search for a struct item in a vector by member data

Question

I\'m very new to c++ and I\'m trying to find a way to search a vector of structs for a struct with a certain member data.

I know this would work with simple types in

Answer 1

If you want to find an element in STL container, use std::find or std::find_if algorithms With C++03, you need to overload operator== for std::find

bool operator==(const Friend& lhs, const Friend& rhs)
{
  return lhs.ID == rhs.ID;
}

if (std::find(friends.begin(), friends.end(), item) != friends.end())
{
   // find your friend
}

OR C++11 with lambda:

std::find_if(friends.begin(), friends.end(),  [](Friend& f){ return f.ID == "1"; } );

If you want to remove a certain element, use std::remove_if

std::remove_if(friends.begin(), friends.end(), 
      [](Friend& f){ return f.ID == "1"; });