In C++ Write the DLList member function bool DLLidt<T>::insert_before(int index, T& x) that is going to insert a node with the value of x before the node at position index in the list.  Example: If the current list is [5, 6, 7, 8] insert_before(2,0); will change the current list to [5,6,0,7,8] **You need to use get_at function, and use it only one time to optimize the call of your code. ** Don’t forget to fix the next, and prev pointers for each node. ** for inserting before 0 index, you may use add_to_head function.

In C++ Plz LAB: Grocery shopping list (linked list: inserting at the end of a list) Given main(), define an InsertAtEnd() member function 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 ItemNode.h Default Code: #include <iostream>#include <string>using namespace std; class ItemNode {private:   string item;   ItemNode* nextNodeRef; public:   // Constructor   ItemNode() {       item = "";       nextNodeRef = NULL;   }    // Constructor      ItemNode(string itemInit) {       this->item = itemInit;       this->nextNodeRef = NULL;   }    // ConstructorItemNode(string itemInit, ItemNode *nextLoc) {this->item = itemInit;this->nextNodeRef = nextLoc;}    // Insert node after this…

Max Absolute In List Function Lab Description Implement function max_abs_val(lst), which returns the maximum absolutevalue of the elements in list.For example, given a list lst: [-19, -3, 20, -1, 0, -25], the functionshould return 25. The name of the method should be max_abs_val and the method should take one parameter which is the list of values to test.  Here is an example call to the function print(max_abs_val([-19, -3, 20, -1, 0, -25])) File Name  maxabsinlst.py Score There are three tests each worth 2 points Note: You do not need any other code including the main method or any print statements. ONLY the max_abs_val method is required. Otherwise, the autograder will fail and be unable to grade your code. (I.e., do not include the above example in your code.) The above example should be used be test your code but deleted or comment out upon submission. PYTHON LAB

struct insert_at_back_of_sll { // Function takes a constant Book as a parameter, inserts that book at the // back of a singly linked list, and returns nothing. void operator()(const Book& book) { /// TO-DO (3) /// // Write the lines of code to insert "book" at the back of "my_sll". Since // the SLL has no size() function and no tail pointer, you must walk the // list looking for the last node. // // HINT: Do not attempt to insert after "my_sll.end()". // ///// END-T0-DO (3) ||||// } std::forward_list& my_sll; };

Ocaml Mode Write a function mode : ’a list -> ’a = that given a (nonempty) list it returns an element that repeats the most times (if ties exist, return the element among them that appears first in the list). examples mode [1;2;1;4;2;5;1;2;6];; - : int = 1 mode [’a’;’b’;’c’;’b’;’a’;’b’;’d’;’c’;’d’];; - : char = ’b’

struct node{ int a; struct node * nextptr; };   Write two functions. One for inserting new values to a link list that uses the given node structure. void insert(struct node **head, int value); Second function is called to count the number of even numbers in the link list. It returns an integer that represents the number of even numbers. int countEvenNumbers(struct node *head); Write a C program that reads a number of integers from the user and insert those integers into a link list (use insert function). Later pass the head pointer of this link list to a function called countEvenNumbers. This function counts and returns the number of even numbers in the list. The returned value will be printed on the screen. Note 1: Do not modify the function prototypes.   Sample Input1:          Sample Output1: 45 23 44 12 37 98 33 35 -1 3   Sample Input2:          Sample Output2: 11 33 44 21 22 99 123 122 124 77 -1 4

C++ ProgrammingActivity: Deque Linked List Explain the flow of the code not necessarily every line, as long as you explain what the important parts of the code do. The code is already correct, just explain the flow. #include "deque.h" #include "linkedlist.h" #include <iostream> using namespace std; class DLLDeque : public Deque {    DoublyLinkedList* list;       public:     DLLDeque() {         list = new DoublyLinkedList();      }         void addFirst(int e) {             list->addAt(e,1);          }              void addLast(int e) {             list->addAt(e,size()+1);          }         int removeFirst() {             return list->removeAt(1);          }         int removeLast() {             return list->removeAt(size());          }         int size(){             return list->size();         }              bool isEmpty() {             return list->isEmpty();         }             // OPTIONAL: a helper method to help you debug         void print() {…

for c++ please thank you  please type the code so i can copy and paste easily thanks. 4, List search  Modify the linked listv class you created in the previous programming challange to include a member function named search that returns the position of a specific value, x, in the lined list. the first node in the list is at position 0, the second node is at position 1, and so on. if x is not found on the list, the search should return -1 test the new member function using an approprate driver program. here is my previous programming challange. #include <iostream> using namespace std; struct node { int data; node *next; }; class list { private: node *head,*tail; public: list() { head = NULL; tail = NULL; } ~list() {    } void append() { int value; cout<<"Enter the value to append: "; cin>>value; node *temp=new node; node *s; temp->data = value; temp->next = NULL; s = head; if(head==NULL) head=temp; else { while (s->next != NULL) s = s->next; s->next =…

struct remove_from_front_of_dll { // Function takes no parameters, removes the book at the front of a doubly // linked list, and returns nothing. void operator()(const Book& unused) { //// TO-DO (13) |||| // Write the lines of code to remove the book at the front of "my_dll", // // Remember, attempting to remove an element from an empty data structure is // a logic error. Include code to avoid that. ///// END-TO-DO (13) //// } std::list& my_dll; };

Computer Science //iterator() creates a new Iterator over this list. It will//initially be referring to the first value in the list, unless the//list is empty, in which case it will be considered both "past start"//and "past end". template <typename ValueType>typename DoublyLinkedList<ValueType>::Iterator DoublyLinkedList<ValueType>::iterator(){//return iterator(head);} //constIterator() creates a new ConstIterator over this list. It will//initially be referring to the first value in the list, unless the//list is empty, in which case it will be considered both "past start"//and "past end". template <typename ValueType>typename DoublyLinkedList<ValueType>::ConstIterator DoublyLinkedList<ValueType>::constIterator() const{//return constIterator(head);} //Initializes a newly-constructed IteratorBase to operate on//the given list. It will initially be referring to the first//value in the list, unless the list is empty, in which case//it will be…