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In the given solution for Union, when either list1 or list2 is empty, why is the returned value elements(list2) or elements(list1), and not just list2 or list1?

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#1

I’m unable to understand the purpose of elements(list1). Isn’t elements a method for Counter class. What am I missing? Thanks.

#2

Hi @Akshat_Verma

Given two lists, A and B, the union is the list that contains elements or objects that belong to either A, B, or to both.

So, what we are doing is checking whether a list is empty or not. If it’s empty, then we are simply returning the other list, as a union is the collection of both lists. Since we are giving a proper implementation of the linked list, therefore we are not simply giving a solution as list1 or list2.