
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Create a method for a linked list that will delete any nodes that have the same key.
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- Implement a linked list of integers as aclass LinkedList. Build the following methods:✓ print that prints the content of the linked list;✓ addFirst that adds a new node to the beginning (the head) of thelinked list;✓ addLast that adds a new node to the end (the tail) of the linked list;✓ indexOf that finds a specific node by its value, and returns node’sindex (node’s position from the left in the linked list); if the valueis not present in the linked list, it returns −1;✓ deleteFirst that deletes the first node in the linked list;✓ deleteLast that deletes the last node in the linked list.Test your class creating a list in the main and1) adding one by one nodes 2, 4, 8 to the tail;2) adding nodes -2, -8 to the head;3) adding a node 9 to the tail;4) printing the list;5) printing indexOf(4);6) printing contains(9);7) deleting one by one all the nodes in the list – either from the tail orfrom the head – and printing the result after each deletion. THEN AFTER THIS Add a new method IN THE…arrow_forwardIn python. Write a LinkedList class that has recursive implementations of the add and remove methods. It should also have recursive implementations of the contains, insert, and reverse methods. The reverse method should not change the data value each node holds - it must rearrange the order of the nodes in the linked list (by changing the next value each node holds). It should have a recursive method named to_plain_list that takes no parameters (unless they have default arguments) and returns a regular Python list that has the same values (from the data attribute of the Node objects), in the same order, as the current state of the linked list. The head data member of the LinkedList class must be private and have a get method defined (named get_head). It should return the first Node in the list (not the value inside it). As in the iterative LinkedList in the exploration, the data members of the Node class don't have to be private. The reason for that is because Node is a trivial class…arrow_forwardJAVA please Given main() in the ShoppingList class, define an insertAtEnd() method in the ItemNode class that adds an element to the end of a linked list. DO NOT print the dummy head node. Ex. if the input is: 4 Kale Lettuce Carrots Peanuts where 4 is the number of items to be inserted; Kale, Lettuce, Carrots, Peanuts are the names of the items to be added at the end of the list. The output is: Kale Lettuce Carrots Peanuts Code provided in the assignment ItemNode.java:arrow_forward
- Figure out how to delete nodes from a linked list that have the same key.arrow_forwardWe need a linked list to hold information about penguins in a zoo. You will need the following integers for your IntNode (see below). I have included sample values for one of the penguins: penguin ID: 45821 penguin weight (kg): 11 penguin height (cm): 90 We now need to track the number of penguins in the zoo. I would like to propose a better way to track the size of the list. Rather than traversing the list every time you need to know its size, why not keep a variable called listSize that increments every time you add a node to the list and decrements anytime you remove an item from the list? public class penguinList { //nested class IntNode goes here private IntNode first; private int listSize; //...the methods of penguinList class go here } Now, you just need to increment the listSize instance variable in every method that adds a node to the list. If you have any methods that removes a node from the list, decrement the listSize instance variable in those methods instead.…arrow_forwardCreate an algorithm in a linked list that will remove all nodes with the same key.arrow_forward
- Given the source code of linked List, answer the below questions(image): A. Fill out the method printList that print all the values of the linkedList: Draw the linked list. public void printList() { } // End of print method B. Write the lines to insert 10 at the end of the linked list. You must draw the final linked List. Notice that you can’t use second or third nodes. Feel free to define a new node. Assume you have only a head node C. Write the lines to delete node 2. You must draw the final linked list. Notice that you can’t use second or third node. Feel free to define a new node. Assume you have only a head nodearrow_forwardJava's LinkedList provides a method listlterator(int index) returning a Listlterator for a list. Declare a variable of LinkedList of integer numbers and write a fragment of Java code to compute and print the sum of the numbers on the list. Do not write code to insert elements to the list and assume that the list already has elements on it. You must only use an iterator obtained from the list (you can not use the get(int index) method) .arrow_forwardPlease use Java Write a method “removeHighestLinkedList” that takes a LinkedList and removes the highest value.arrow_forward
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