to control key in map stl

[antani]

How can I control if key in stl map exist?

I have a map<Point3i,bool> mapPoint;

I would like control if a point mapPoint[Poin3i(1,1,1)] already exist.
How can I do this?

An information about map stl.
What is time to insert a Point3i and what is time to access to itself
Point3i?

Thanks.

 

[John Harrison]

How can I control if key in stl map exist?

I have a map<Point3i,bool> mapPoint;

I would like control if a point mapPoint[Poin3i(1,1,1)] already exist.
How can I do this?

An information about map stl.
What is time to insert a Point3i and what is time to access to itself
Point3i?

Thanks.

if (mapPoint.count(Point3i(1,1,1)))
{
std::cout << "1,1,1 exists";
}
else
{
std::cout << "1,1,1 does not exist";
}

 

[John Harrison]

An information about map stl.
Both are logarithmic time.

john