PPT-Doubly Linked Lists

Linking in double direction A doubly linked list is a linked list in which every node has a next pointer and a back pointer A doubly linked list can be traversed in either direction That is we can traverse the list starting at the first node or if a pointer to the last node is given we can traverse the list starting at the last node. Singly linked lists are flexible structures where memory can be allocated in small blocks as needed Also when deleting or inserting nodes from a singly linked list the overhead is re latively low compared to array insertions where array elements ha Unlike singly linked lists where traversal is only one way doubl y linked lists allow traversals in both ways A generic doubly linked list node can be desi gned as typedef struct node void data struct node next struct node prev node node head nod class List { List() { head = new Node; head-next = head-prev = head; } // destructor virtual ~List() { Node *p = head-next; while (p != head) { Node *next = p-next; delete p; 1. Doubly. . Linked . Lists. © 2014 Goodrich, Tamassia, Goldwasser. Presentation for use with the textbook . Data Structures and Algorithms in Java, 6. th. edition. , by M. T. Goodrich, R. Tamassia, and M. H. Goldwasser, Wiley, 2014. 1. Singly Linked Lists. Presentation for use with the textbook . Data Structures and Algorithms in Java, 6. th. edition. , by M. T. Goodrich, R. Tamassia, and M. H. Goldwasser, Wiley, . 2014. Singly Linked Lists. Instructor - Andrew S. O’Fallon. CptS. 122 . (September 19, . 2016). Washington State University. Lists, Stacks, & Queues (I). Lists . Insertions and deletions may be made anywhere in the array or linked list. Data Structure. Marcus Biel, Software . Craftsman. http://www.marcus-biel.com. Terminology. First of all, let’s have a look at the term “Linked List”. . Why . is Linked List actually called Linked List?. Topics to be discussed…. Linked list. More terminology. Singly-linked lists. Doubly-linked lists. DLLs compared to SLLs. Circular Lists. Linked list. a. b. c. d. Each node contains a . value. and a . Hongfei. Yan. Apr. 6, 2016. live.gnome.org/. Dia. draw entity relationship diagrams, . Unified Modeling Language . diagrams, flowcharts, network diagrams, and many other diagrams.. The UML models not only application structure, behavior, and architecture, but also business process and data structure.. R. evised based on textbook author’s notes.. Doubly linked lists. A linked list in which each node contains a data component(s) and two links: . one pointing the next node and . one pointing to the preceding node.. Objectives. Doubly linked list concept. Node structure. Insertion sort. Insertion sort program with a doubly linked list. Illustration of a Doubly Linked List. Head. 0. a. b. c. d. e. 0. Node Structure for a Doubly Linked List Node. Dummy Nodes, Doubly Linked Lists and Circular Linked Lists Dummy Nodes Plain Linked List Linked List has annoying special cases: InsertAt (index, value) If index = 0 InsertFirst (value) Else z. immediately after . v. . Specifically, let . w. the be node following . v. . We execute the following steps: . 1. make . z's. . prev. link refer to v . 2. make . z's. next link refer to w . 3. make . ADT: List. Has an order. All elements are of the same type. List has a size. List allows duplicates. We probably want push, pop, size, insert, remove, find, . findkth. , concatenate, etc.. Arrays:. One way to implement the list ADT.