Accessing a constant

Question

Why can\'t I access \'B\' in the following from \'A\' but can from the main environment?

module A; end
A.instance_eval{B=1}

B #=> 1
A::B #=> uninitial         


        

Answer 1

Because . . .

. . . constants that are not defined within a class or module are given global scope.

What matters for constant definition is the enclosing lexical scope, not the current receiver or the value of self.