is
Examines each element, a_i starting at 0, and determines if all the elements are equal a_0 = a_1 = a_2, etc.
Return
true if all elements are equal, if there are 0 elements then it returns false, 1 element returns true
Examines each element, a_i starting at 0, and determines if all the elements are equal a_0 = a_1 = a_2, etc.
true if all elements are equal, if there are 0 elements then it returns false, 1 element returns true