Question

I realize there are no way for me to replace value through LinkedList.Enumerator.

For instance, I try to port the below Java code to C#:

Java code:

ListIterator<Double> itr1 = linkedList1.listIterator();
ListIterator<Double> itr2 = linkedList2.listIterator();
while(itr1.hasNext() && itr2.hasNext()){
    Double d = itr1.next() + itr2.next();
    itr1.set(d);
}

C# code:

LinkedList<Double>.Enumerator itr1 = linkedList1.GetEnumerator();            
LinkedList<Double>.Enumerator itr2 = linkedList2.GetEnumerator();

 while(itr1.MoveNext() && itr2.MoveNext()){                
    Double d = itr1.Current + itr2.Current;
    // Opps. Compilation error!
    itr1.Current = d;
}

Any other techniques I can use?

Answer 1

C#’s LinkedList enumerator enumerates the values, not the nodes.

If you want to modify nodes as in the Java version, I think you have to “enumerate” the nodes manually:

LinkedListNode<Double> nod1 = linkedList1.First;
LinkedListNode<Double> nod2 = linkedList2.First;
while (nod1 != null && nod2 != null)
{
    Double d = nod1.Value + nod2.Value;              
    nod1.Value = d;
    nod1 = nod1.Next;
    nod2 = nod2.Next;
}