Looking at vector, I realized that I have never used the second argument when creating vectors.

std::vector<int> myInts; // this is what I usually do
std::vector<int, ???> myOtherInts; // but is there a second argument there?

Looking at the link above it says that it is for:

Allocator object to be used instead of constructing a new one.

or, as for this one:

Allocator: Type of the allocator object used to define the storage allocation model. By default, the allocator class template for type T is used, which defines the simplest memory allocation model and is value-independent.

I guess it has to do with something with memory management. However, I am not sure how to use that.

Any pointers regarding this?

c++ vector allocator
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