3/12/2023 0 Comments Double pointer linked list![]() This helps us to traverse in both directions. In singly-linked lists, we only use the next pointer in each node, but in doubly linked lists we also add a previous pointer that links each element to its previous element. ![]() Each node consists of pointers that link to the next node/next element in the list. Since linked lists can be noncontiguous, we use nodes to store the value of elements and create links between them so that they are in sequential order. What is a linked list?Ī linked list is a collection of nodes. Whereas, a list can be thought about as a collection containing the Taj Mahal, Pacific Ocean, Bill Gates, and a football. Think about an array as a collection of all the buildings on a given street or a collection of all fish in a fish tank. ![]() Note: The elements can be in different memory locations, but the references for these elements are stored in contiguous memory locations. If you want to be able to modify the value of the head node then you should use double pointer else just use Case 2. We can also say that elements in an array are contiguous.Ī list a collection of elements of different data types that are not contiguous. ![]() An array, is a collection of elements of the same data type that are present in adjacent memory locations. Before we get into doubly linked lists, let’s discuss some basics.įirst, let’s discuss what an array is.
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