What is prototype.constructor for?

Question

In continuation of this question, what is prototype.constructor for?

I thought that by simply doing:

new some_object()

that the function object became a constructor. I don't understand why you would need to set it in this manner.

some_object.prototype.constructor = some_object;

Answer 1

Suppose class A inherit B using the following:

A.prototype = new B();

After this A.prototype.constructor == B. So instances of A have a constructor from B. It's a good practice to reset a constructor after the assignment.