How to convert vector to set? [closed]

Question

I have a vector, in which I save objects. I need to convert it to set. I have been reading about sets, but I still have a couple of questions:

• How to correctly initialize it? Honestly, some tutorials say it is fine to initialize it like set<ObjectName> something. Others say that you need an iterator there too, like set<Iterator, ObjectName> something.

• How to insert them correctly. Again, is it enough to just write something.insert(object) and that's all?

• How to get a specific object (for example, an object which has a named variable in it, which is equal to "ben") from the set?

I have to convert the vector itself to be a set (a.k.a. I have to use a set rather than a vector).

Answer 1

Suppose you have a vector of strings, to convert it to a set you can:

std::vector<std::string> v;  std::set<std::string> s(v.begin(), v.end()); 

For other types, you must have operator< defined.

Answer 2

All of the answers so far have copied a vector to a set. Since you asked to 'convert' a vector to a set, I'll show a more optimized method which moves each element into a set instead of copying each element:

std::vector<T> v = /*...*/;  std::set<T> s(std::make_move_iterator(v.begin()),               std::make_move_iterator(v.end())); 

Note, you need C++11 support for this.