Question

I have custom class Person which contains only data about person ( name, last name, height …). I have couple lists of pointers to Person like

list<Person*> list1;
list<Person*> list3;
list<Person*> list2;

and I concatenate

using std::copy() and std::back_insert_iterator<std::list<Person*> >

How to remove duplicates from list (only pointers which point to same junk of memory, not to delete that memory, only remove pointers from list) ?

Answer 1

If you don’t mind reordering the list:

list.sort()
list.unique()