PPT-Dummy Nodes, Doubly Linked Lists and Circular Linked Lists

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. 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. Chapter 3. 1. 2. Data Abstraction. separates the logical properties of . a data . type from its . implementation. LOGICAL PROPERTIES. What. are the possible values? . What. operations will be needed?. 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. 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.. 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.. nodes. Every node (except the last one) contains the address of the next node. The address of first node is stored in separate location called as . head. or . first. Every node in linked list has 2 components:. 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.