Circular linked list. The first free block contains a pointer to the next free block, it contains a pointer to the next free block, and so forth. Both members are pointers to LIST_ENTRYstructures. Template method pattern (to define the preparation sequence). In C/C++, we can represent a node of Linked List using structures or classes. In computer science, a doubly linked list is a linked data structure that consists of a set of sequentially linked records called nodes.Each node contains three fields: two link fields (references to the previous and to the next node in the sequence of nodes) and one data field. An In-Depth Tutorial On Doubly Linked List. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready. Nodes are connected through pointers. It has two pointers namely next and previous. A doubly linked list is a linked data structure that is sequentially linked nodes where every node contains information about his next and his previous node. We use cookies to ensure you have the best browsing experience on our website. Doubly linked list is the best solution here. application of doubly linked list, Free List (Linked List of Free Blocks) The address (block number) of the first free block is kept in a designated place in memory. A doubly linked list is a variation of the singly linked list. About. The list head is also represented as a LIST_ENTRYstructure. As per the above illustration, following are the important points to be considered. The real life application where the circular linked list is used is our Personal Computers, where multiple applications are running. While a singly linked list would be efficient in one direction, the doubly linked version would be efficient in both. Undo functionality in Photoshop or Word (a linked list of state). By using our site, you
What algorithm is used in modern day elevators. linked-list doubly-linked-list sorted-lists phone-book c-programming data-structures simple Resources. Applications that have a Most Recently Used (MRU) list (a linked list of file names). This is the kind of linked list it uses. You learned earlier that collections.deque uses a linked list as part of its data structure. A doubly linked list is a linked list in which each node knows where both of its neighbors are.A circular linked list is a linked list in which the "tail" of the list is linked to the "root". Doubly Linked List A doubly linked list contains a pointer to both sides of the previous node as well as to the next node. Undo functionality in Photoshop or Word (a linked list of state) 4. In singly linked list, we can move/traverse only in one single direction because each node has the address of the next node only.Suppose we are in the middle of the linked list and we want the address of previous node then we don’t have any option other than repeating the traversing from the beginning node. A circular linked list is a variation of a linked list in which the last element is linked to the first element. Make an application that stores names and phone numbers (as one example) and then give it the capability to output them in both ascending and descending order (based on name). To do the same in a singly linked list, one must have the address of the pointer to that node, which is either the handle for the whole list (in case … insert : Inserts an item. Work fast with our official CLI. Doubly Linked List Implementation Linked List Implementation Each node in a list consists of at least two parts: 1. Linked List is a data structure consisting of a group of vertices (nodes) which together represent a sequence. Circular lists are useful in applications to repeatedly go around the list. The first free block contains a pointer to the next free block, it contains a pointer to the next free block, and so forth. Applications of linked list in computer science –, Applications of linked list in real world-. Because of two node pointers in doubly linked list, we could traverse the list in both forward and backward directions. Therefore, in a doubly linked list, a node consists of three parts: node data, pointer to the next node in sequence (next pointer) , pointer to the previous node (previous pointer). Under the simplest form, each vertex is composed of a data and a reference (link) to the next vertex in the sequence. Linked List is a very commonly used linear data structure which consists of group of nodes in a sequence.. Each node holds its own data and the address of the next node hence forming a chain like structure.. Co... Breadth-first search (BFS) is an algorithm for traversing or searching tree or graph data structures. GitHub - akashjain04/Phone-Book-with-DLL: Phone Book application to demonstrate Doubly Linked List with header concept. Readme Releases No releases published. The linked list is a linear data structure which can be described as the collection of nodes. 3) We can quickly insert a new node before a given node. One type of linked list is called “Singly linked list”. There is no null at the end in it. The elements in a linked list are linked using pointers as shown in the below image: The implementation of each dllist is as a circular doubly-linked list with a sentinel node. In a circular linked list, we start from the next of the … Each of these nodes contain three parts, namely the data and the reference to the next list node and the reference to the previous list node. This is a type of linked list in which the last node points to the starting node. In this tutorial you will learn about doubly linked list in C and C++. Please write to us at contribute@geeksforgeeks.org to report any issue with the above content. In Java and Python, Linked List can be represented as a class and a Node as a separate class. The next pointer of the last node will point to null. allow to traverse the list in both directions, Applications of circular and doubly link list, Sonar Violation: Security - Array is stored directly. In doubly linked list, in addition to the singly linked list, there will be one extra node pointer which points the previous node. In a doubly linked list, one can insert or delete a node in a constant number of operations given only that node's address. Circular linked list. Therefore, in a doubly linked list, a node consists of three parts: node data, pointer to the next node in sequence (next pointer) , pointer to the previous node (previous pointer). A circularly linked list is just like representing an array that are supposed to be naturally circular ,e.g. A great way to represent a deck of cards in a game. See your article appearing on the GeeksforGeeks main page and help other Geeks. It is also used by the Operating system to share time for different users, generally uses a Round … Each node contains three fields: two link fields (references to the previous and to the next node in the sequence of nodes) and one data field. 1. Before start the design, we need to understand how a restaurant works. Undo functionality in Photoshop or Word (a linked list of state). A circular list can be split into two circular lists, in constant time, by giving the addresses of the last node of each piece. array = array; } Solution public void setMyArray1(S... TapeEquilibrium Minimize the value |(A[0] + ... + A[P-1]) - (A[P] + ... + A[N-1])|. How to delete a node from end of a doubly linked list. It is convenient for the operating system to use a circular list so that when it reaches the end of the list it can cycle around to the front of the list. I hope you have understood how to perform basic operations on singly and doubly linked list in C. In computer science, the sleeping barber problem is a classic inter-process communication and synchronization problem between multiple oper... public void setMyArray(String[] array) { this . Doubly Linked List contains a link element called first and last. This Tutorial Explains the Doubly Linked List in Java along with Double Linked List Implementation, Circular Doubly Linked List Java Code & Examples: The linked list is a sequential representation of elements. Circular linked list should be used is a timesharing problem solved by the operating system. The linked list is a linear data structure which can be described as the collection of nodes. In singly linked list, to delete … Attention reader! Writing code in comment? We maintain head and tail pointers, since inserted item is always greatest, we insert at tail. Make an application that stores names and phone numbers (as one example) and then give it the capability to output them in both ascending and descending order (based on name). Advantages over singly linked list 1) A DLL can be traversed in both forward and backward direction. Doubly Linked List (in C) // Another data structure video—this one follows up my linked-list video. Deleting an item from head or tail can be done in O(1) time. In doubly linked list, Node has data and pointers to next node and previous node. Doubly linked list is a type of data structure that is made up of nodes that are created using self referential structures. Each node of the list contain two references (or links) – one to the previous node and other to the next node. Each node has two pointers -- a forward link (next) to the next node on the list, and a backward link (prev) to the previous node on the list.A Dllist container object contains a pointer to the sentinel node and is the object that is returned to the user. Node Structure. In computer science, a doubly linked list is a linked data structure that consists of a set of sequentially linked records called nodes. The browser cache which allows you to hit the BACK buttons (a linked list of URLs). A basic C++ structure of node in a singly linked list is shown below. A linked list is a collection of multiple nodes where each node stores a reference to a data, as well as a reference to the next node of the list A Not-So-Formal-Definition: A linked list is a collection of multiple birthday presents where each present comes in two parts, one gift and a clue to get next gift. Each node contains two fields: data and pointer to the next field. Mention what is Linked lists? Doubly Linked List: Doubly Linked List is a variation of the linked list. Experience. Can add a free block to the beginning of the free list in O(1) time. Doubly Linked List: Doubly Linked List is a variation of the linked list. However, this is not possible in a circular linked list. With a circular list, a pointer to the last node gives easy access also to the first node, by following one link. It may be assumed that the inserted item is always greater than maximum so far. Learn more . The example Java application DLLDemo demonstrates how to create, insert, and delete nodes in a doubly-linked list. Applications that have an MRU list (a linked list of file names) 2. Can add a free block to the beginning of the free list in O(1) time. A linked list is a linear data structure, in which the elements are not stored at contiguous memory locations. In singly linked list, we can move/traverse only in one single direction because each node has the address of the next node only.Suppose we are in the middle of the linked list and we want the address of previous node then we don’t have any option other than repeating the traversing from the beginning node. In the doubly linked list, each node has three components: the value of the node, the reference to the previous node, and the reference to the next node. A circularly linked list may be a natural option to represent arrays that are naturally circular, e.g. A Single Linkedlist typically has a node reference to the next node and a value, on the other hand the doubly linked list has two references, previous and next, pointing to different nodes. Each node contains three fields. Nodes are connected through pointers. 5. If nothing happens, download GitHub Desktop and try again. in both the direction. Each node of the list contain two references (or links) – one to the previous node and other to the next node. A linked list is a data structure that can store a collection of items. In terms of structure, this is how a doubly linked list would look: Doubly Linked List. This way it can move items around, or push a slow-running process to the back of the line. It possesses an extra pointer Prev in addition to the fields of a node in singly linked list.Conventionally, in a singly and circular linked list… For example, a valid insertion order is 10, 12, 13, 20, 50. Lists that contain reference types perform better when a node and its value are created at the same time. Applications Of Doubly Linked List A Deck of cards in a game is a classic example of a doubly linked list. Each list entry is represented as a LIST_ENTRY structure. The main use is as like a pipeline where (conceptually) you push stuff in one end - and take it out at the other some time later. Introduction to Linked Lists. Doubly linked list is a type of data structure that is made up of nodes that are created using self referential structures. Doubly Linked List. The application's source code is show in Listing 1. A circular linked list can be either singly linked or doubly linked. (The number of list entries is zero if the list is empty.) CIRCULAR LINKED LIST. In this post, we will see about Doubly LinkedList implementation in java. In this post, we will see the Doubly Linked List example in Java. A doubly linked list is a linked list in which each node knows where both of its neighbors are.A circular linked list is a linked list in which the "tail" of the list is linked to the "root". Three-part of doubly linked list Value Previous pointer Next pointer Advantage over singly Linked List: It can be traversed in both direction Easy deletion if … Listing 1. Unlike. A doubly linked list is an advanced form of linked list which has the ability to traverse back and forth i.e. It subsequently limit... Let we start to design Object Oriented architecture of restaurant. Performing arithmetic operations on long integers, Manipulation of polynomials by storing constants in the node of linked list, Useful for implementation of queue. In server programming, suppose one client request can be processed using one thread than there will few challenges: 1. Put all the players in a circular linked list. This forms a circular loop. In the LIST_ENTRY structure th… A doubly linked list is also a collection of nodes. Doubly linked list is a complex type of linked list in which a node contains a pointer to the previous as well as the next node in the sequence. Abstract Factory, 2. Phone Book application to demonstrate Doubly Linked List with header concept. Doubly Linked List Doubly-linked list is a more sophisticated form of linked list data structure. Topics. In linear linked lists like singly linked list and doubly linked lists, traversal is easy as we visit each node and stop when NULL is encountered. A great way to represent a deck of cards in a game. Circular linked list A simple example is keeping track of whose turn it is in a multi-player board game. The doubly linked list has the same operations as that of singly linked list in C programming language. Doubly Linked List: A doubly linked list is a linked list data structure that includes a link back to the previous node in each node in the structure. back and forward button. You can consider this as an extension of Singly linked list.It is quite complex to implement it as compared to singly linked list. In … Pointer to the next node. Data 2. Write a C program to create a doubly linked list and delete a node from beginning, end or at any position of the linked list. 2) The delete operation in DLL is more efficient if pointer to the node to be deleted is given. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. Unlike this implementation, we don’t need to maintain two pointers for front and... Circular lists are useful in applications to repeatedly go around the list. The structure of the circular linked list is like a closed loop. Recently, when building a music streaming application, I had the opportunity to apply real-world context to a data structure. Node Structure. This will cause the program to cycle indefinitely among the players. Some of them can be listed as: Doubly linked list can be used in navigation systems where both front and back navigation is required. A stack, hash table, and binary tree can be implemented using a doubly linked list. A Single Linkedlist typically has a node reference to the next node and a value, on the other hand the doubly linked list has two references, previous and next, pointing to different nodes. The doubly linked list has the same operations as that of singly linked list in C programming language. How to delete a node from … Continue reading C program to delete a node from doubly linked list → A non-empty zero-indexed array A consisting of N integer... Design patterns used: 1. 1) A DLL can be traversed in both forward and backward direction. For example, when multiple applications are running on a PC, it is common for the operating system to put the running applications on a list and then to cycle through them, giving each of them a slice of time to execute, and then making them wait while the CPU is given to another application. Applications that have a Most Recently Used (MRU) list (a linked list of file names). In this tutorial you will learn about doubly linked list in C and C++. Many *MANY* things! A stack, hash table, and binary tree can be implemented using a doubly linked list. Doubly linked list or more commonly referred to as DLL is similar in node structure as that for a singly linked list except for the fact that they have an extra pointer which is used for back traversal on the list. Singly Linked List: Singly linked lists contain nodes which have a data part and an address part, i.e., Next, which points to the next node in the sequence of nodes. Here we will cover insertion part, for deletion part we have separate post. Doubly linked lists also include a field and a link to the next node in the list. Phone Book application to demonstrate Doubly Linked List with header concept. For the start node of the doubly linked list, the reference to the previous node is null. Doubly Linked List Representation. How to delete a node from beginning of a doubly linked list. Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below. An operating system will use a doubly linked list to maintain the schedule of all running processes. All the running applications are kept in a circular linked list and the OS gives a fixed time slot to all for running. The operating system provides built-in support for doubly linked lists that use LIST_ENTRY structures. Doubly linked list is a complex type of linked list in which a node contains a pointer to the previous as well as the next node in the sequence. Doubly Linked Lists are used extensively in various computer science domains like caching, binary trees etc. We have already seen the implementation of singly linked list. Design a data structure that supports following operations efficiently. After a player takes his turn, advance to the next player in the list. Applications of Circular Linked Lists: Useful for implementation of queue. Similarly, for the last node in the doubly linked list, the reference to next node is null. Each element of the linked list is called a ‘Node’. Dynamic memory allocation : We use linked list of free blocks. It starts at the tree root (or some a... A simple example is keeping track of whose turn it is in a multi-player board game. application of doubly linked list, Free List (Linked List of Free Blocks) The address (block number) of the first free block is kept in a designated place in memory. Doubly linked list . The previous link of the first node and the next link of the last node points to NULL. 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In this post, we … A doubly linked list whose nodes contain three fields: an integer value, the link forward to the next node, and the link backward to the previous node. More Information. There are various application of doubly linked list in the real world. Each LIST_ENTRY structure contains an Flink member and a Blink member. in this a pointer to any node serves as a handle to the whole list. While it can be good to learn these concepts in isolation, adding some real world context can help give a fuller picture of the purpose a data structures can serve. Circular Linked List. Use Git or checkout with SVN using the web URL. Thus, in applications that require access to both ends of the list (e.g., in the implementation of a queue), a circular structure allows one to handle the structure by a single pointer, instead of two. A technique known as XOR-linking allows a doubly linked list to be implemented using a single link field in each node. for singly linked list, next pointer of last item points to the first item Previous Next In this post, we will see about Doubly LinkedList implementation in java. We have already seen the implementation of singly linked list. In doubly linked list, Node has data and pointers to next node and previous node. Implementation. I hope you have understood how to perform basic operations on singly and doubly linked list in C. The previous link of the first node and the next link of the last node points to NULL. Doubly-linked list is a more sophisticated form of linked list data structure. Circular Doubly Linked Lists are used for implementation of advanced data structures like. This is contrasted with a singly linked list where each node only has a link to the next node in the list. For example, … The cache in your browser that allows you to hit the BACK button (a linked list of URLs) 3. While a singly linked list would be efficient in one direction, the doubly linked version would be efficient in both. It can be a singly circular linked list and doubly circular linked list like linked list. Given that each card in a deck has the previous... Browser history/cache – The browser cache has a collection of URLs and can be navigated using … Please use ide.geeksforgeeks.org, generate link and share the link here. After finishing the previous chapters, you should be familiar with the singly linked list. It is used by browsers to implement backward and forward navigation of visited web pages i.e. The only difference is that there is another address variable which help is traversing the list better in a doubly linked list. So all operations take O(1) time. Following are advantages/disadvantages of doubly linked list over singly linked list. We are aware that the singly linked list is a collection of nodes with each node having a data part and a pointer pointing to the next node. 2) The delete operation in DLL is more efficient if pointer to the node to be deleted is given. Doubly Linked Lists are used extensively in various computer science domains like caching, binary trees etc. Introduction : Doubly Linked List(DLL) contains one data reference and two node pointers, next and previous. Because the LinkedList is doubly linked, each node points forward to the Next node and backward to the Previous node. A doubly linked list consists of a list head plus some number of list entries. Don’t stop learning now. Each link is linked with its next link using its next link. You can consider this as an extension of Singly linked list.It is quite complex to implement it as compared to singly linked list. Each link carries a data field(s) and two link fields called next and prev. Linked Lists are used to create trees and graphs. So circular buffers are generally handy for things like “task queues”. 3) We can quickly insert a new node before a given node. Each link is linked with its previous link using its previous link. A stack, hash table, and binary tree can be implemented using a doubly linked list. When you first start diving into data structures, a lot of the discussions/reading tend to be abstract or even academic. A doubly linked list is a linked list in which every node has two pointers (named previous and next) with one data element Previous Pointer: This pointer is of type node which points to the address of the node before it and in case of the first node it is assigned as NULL denoting that it doesn't point to anything. With a circular list, a pointer to the last node gives easy access also to the first node ,by following one link. The only difference is that there is another address variable which help is traversing the list better in a doubly linked list. Circular linked list is the basic idea of round robin scheduling algorithm. Doubly linked list . The OS will pick a user; let it use a small amount of CPU time and then move on to the next user, etc. Each of these nodes contain three parts, namely the data and the reference to the next list node and the reference to the previous list node. Its data structure that can store a collection of nodes next and previous a basic C++ structure of first. Set of sequentially linked records called nodes data structures, a pointer any...: phone Book application to demonstrate doubly linked list greatest, we … the operating system … terms! List can be implemented using a doubly linked list: doubly linked list is a more form. Industry ready ) a DLL can be represented as a LIST_ENTRYstructure allocation: we use linked list has same... C. circular linked list C++ structure of node in a multi-player board game implementation of queue insert, and nodes... A timesharing problem solved by the operating system will use a doubly linked list structures, a doubly list! Is an algorithm for traversing or searching tree or graph data structures of. Head plus some number of list entries called nodes item is always greater maximum... Applications that have an MRU list ( a linked list is a linear data structure video—this one follows my... Contain two references ( or links ) – one to the starting.... A free block to the next player in the list arrays that naturally... Suppose one client request can be represented as a handle to the last node gives easy also. Some number of list entries is zero if the list github - akashjain04/Phone-Book-with-DLL: phone Book application to demonstrate linked! Per the above content is that there is another address variable which help is traversing the list contain two (! Preparation sequence ), linked list node gives easy access also to the previous chapters, you be... Used extensively in various computer science domains like caching, binary trees.. Are generally handy for things like “ task queues ” new node before a given.. A natural option to represent a sequence pointer to any node serves as a LIST_ENTRYstructure with its next using! As an extension of singly linked list '' button below used ( MRU ) list ( a linked.! In Photoshop or Word ( a linked list with header concept similarly, for deletion we! Deck of cards in a doubly linked list pages i.e applications to repeatedly go around the.. Is traversing the list zero if the list head is also a collection nodes. Can move items around, or push a slow-running process to the node to be implemented using a single field... The web URL repeatedly go around the list better in a multi-player board.... Implemented using a doubly linked list and the OS gives a fixed slot. Is as a separate class with header concept ) the delete operation in DLL is more if. At tail learned earlier that collections.deque uses a linked list as part of its data structure can! To represent a node from beginning of a list consists of a list. Linked-List video ) is an algorithm for traversing or searching tree or graph data structures like round. Pointers in doubly linked list as part of its data structure which can be implemented using a single link in. Would look: doubly linked list with a circular doubly-linked list with header concept, a pointer to next. Computers, where multiple applications are running as that of singly linked list of file names ) architecture restaurant!, 12, 13, 20, 50 of file names ) 1 ) time list using or. A link element called first and last is traversing the list contain two references ( or links ) – to. The beginning of the line, binary trees etc Recently, when building a application of doubly linked list application. This will cause the program to cycle indefinitely among the players set of sequentially linked records nodes! Try again delete a node as well as to the node to be or... A classic example of a doubly linked list is shown below, has... A closed loop task queues ” contrasted with a sentinel node are Useful in applications repeatedly. It subsequently limit... Let we start to design Object Oriented architecture of restaurant array a of! It can move items around, or push a slow-running process to the starting node node... A field and a Blink member apply real-world context to a data...., by following one link because the LinkedList < T > is doubly linked list just... A player takes his turn, advance to the next node and previous node and previous order is 10 12! Than there will few challenges: 1 this is how a restaurant works streaming application, had! Breadth-First search ( BFS ) is an algorithm for traversing or searching tree or graph data structures like appearing the. Address variable which help is traversing the list life application where the circular linked in! In your browser that allows you to hit the BACK of the linked list is linear... Forward and backward to the first node, by following one link cause the program to cycle indefinitely among players... Cards in a game for traversing or searching tree or graph data structures ) we can quickly a. Insert a new node before a given node queues ” ) contains one reference! The list is a variation of the free list in C. circular linked list, the linked! Process to the next node the design, we will see the doubly application of doubly linked list may. We use linked list in which the last node points to null experience on website! To a data structure just like representing an array that are supposed to be deleted is given when first... Around the list is a more sophisticated form of linked list is a variation of doubly. Linked list the LinkedList < T > is doubly linked list in and... Is shown below we maintain head and tail pointers, since inserted is. In various computer science domains like caching, binary trees etc that store! Article '' button below list a deck of cards in a circular doubly-linked list is there are various of... Among the players in a doubly linked list consists of a linked data structure that supports following operations efficiently to! Ide.Geeksforgeeks.Org, generate link and share the link here has the same operations as that of singly linked list.It quite... To demonstrate doubly linked version would be efficient in one direction, doubly!: we use cookies to ensure you have understood how application of doubly linked list create trees and graphs turn! Delete nodes in a circular list, a valid insertion order is 10 12! Pointers to next node and the OS gives a fixed time application of doubly linked list to all for running already the... A field and a Blink member on our website it subsequently limit... Let we start to Object. Report any issue with the DSA Self Paced Course at a student-friendly price and become ready... Write to us at contribute @ geeksforgeeks.org to report any issue with the Self! For things like “ task queues ” list example in Java request can be processed one...... Breadth-first search ( BFS ) is an algorithm for traversing or searching tree or graph data structures a!: Useful for implementation of advanced data structures like or graph data.... Well as to the node to be abstract or even academic the last element is linked with its link! Java application DLLDemo demonstrates how to delete a node from beginning of the linked. Structure consisting of a doubly linked Lists are used extensively in various computer science, a pointer to the list. Per the above illustration, following are the important DSA concepts with the DSA Self Paced at. The OS gives a fixed time slot to all for running understand how a restaurant.. To implement backward and forward navigation of visited web pages i.e a LIST_ENTRY structure th… this. Get hold of all the players group of vertices ( nodes ) which together represent a sequence write... Report any issue with the singly linked list would look: doubly list! Only has a link element called first and last multiple applications are running abstract or academic! Which allows you to hit the BACK button ( a linked list where each node of linked is... List can be described as the collection of nodes: Useful for implementation of advanced data structures, lot. Familiar with the DSA Self Paced Course at a student-friendly price and become industry ready data and to... Link carries a data structure a handle to the previous node and other to the first and... Data field ( s ) and two link fields called next and previous node Improve this if! Fixed time slot to all for running github Desktop and try again button.... Queues ” his turn, advance to the next node the singly linked list contains a link to node! Can consider this as an extension of singly linked list to next and! Tutorial you will learn about doubly LinkedList implementation in Java linked Lists are Useful applications. Element is linked to the previous chapters, you should be used our! Or graph data structures, a pointer to both sides of the linked list in O ( 1 ).! Are advantages/disadvantages of doubly linked list in C. circular linked list and doubly linked.. Node pointers in doubly linked list would be efficient in both forward and directions!, e.g may be a singly linked list and doubly linked list contains a pointer any... Here we will cover insertion part, for the start node of the discussions/reading tend to be or. Two fields: data and pointers to next node ( a linked list ). Sentinel node student-friendly price and become industry ready and backward direction of two node pointers in doubly linked list a. Move items around, or push a slow-running process to the next node and previous collection nodes...

2020 application of doubly linked list