Question 2: Nonzero Write a function that takes in a list and returns the first nonzero entry. def nonzero(lst): """ Returns the first nonzero element of a list >> nonzero([1, 2, 3]) 1 >> nonzero([0, 1, 2]) >> nonzero([0, 0, 0, 0, 0, 0, 5, 0, 6])
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- C++The List class represents a linked list of dynamically allocated elements. The list has only one member variable head which is a pointer that leads to the first element. See the following code for the copy constructor to List. List (const List & list) { for (int i = 0; i <list.size (); i ++) { push_back (list [i]); } } What problems does the copy constructor have? Select one or more options: 1. List (const List & list) {} does not define a copy constructor. 2. The list parameter should not be constant. 3. The new elements will be added to the wrong list. 4. Copy becomes shallow rather than deep. 5. The copy will create dangling pointers. 6. Copying will create memory leaks. 7. The condition must be: i <size () 8. head is never initialized.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 LABDefine the function (siftNum lst). This function should resolve to all the numbers in the list, lst. For example: (siftNum '(a 8 2 1 m l 90 p 2)) resolves to '(8 2 1 1 90 2).
- def normal (L): '' '(list of int) -> list Precondition: len (L)> = 1 This function must return a new list R which has the same contents of L except where there is a sequence of consecutive zeros, the list R must have only one zero such that in the examples: >>> normal ([1,2,0,0,0,3,0]) [1, 2, 0, 3, 0] >>> normal ([1,2,0,0,0,3,0,0,0,0]) [1, 2, 0, 3, 0] >>> normal ([0,0,1,0,2,0,0,0,3,0,0,0,0,0]) [0, 1, 0, 2, 0, 3, 0] >>> normal ([1,2,2,0,3,3,3,0]) [1, 2, 2, 0, 3, 3, 3, 0] '' ' [1, 2, 0, 3, 0] >>> tanganyika([1,2,0,0,0,3,0,0,0,0]) [1, 2, 0, 3, 0] >>> tanganyika([0,0,1,0,2,0,0,0,3,0,0,0,0]) [0, 1, 0, 2, 0, 3, 0] >>> tanganyika([1,2,2,0,3,3,3,0]) [1, 2, 2, 0, 3, 3, 3, 0] ''' Please: Do not use dictionaries.- Do not use sets- Do not use 'break'.- You cannot import a library or other moduleTopic: Singly Linked ListImplement the following functions in C++ program. Read the question carefully. Below are the "CODE THAT NEEDS TO BE IMPROVED" or "NOT FINAL CODE" (See attached photo for reference) int add(int num) This will add the element num into the linked list and return the position of the newly-added element. In the above example, having add(60) will return 5 as it is the fifth position in the list. int remove(int num) This will remove the first instance of the element and return the position of the removed element. In the above example, having remove(40) will return 3 as 40 was the third element in the linked list before having removed. int get(int pos) This method will get the element at the specified position. This will return -1 if the specified position is invalid. int add(int num) { addTail(num); return index; } int remove(int num) { node* currnode = head; node* prevnode = NULL;…Topic: Singly Linked ListImplement the following functions in C++ program. Read the question carefully. (See attached photo for reference) int removeAt(int pos) Removes the number in the posth position of the list and returns the element removed. Performing removeAt(3) in the example list will remove the 3rd element of the linked list and the updated list will be: 10 -> 30 -> 50 When the value of pos is greater than the size or less than one, return -1. int removeAll(int num) Removes all instances of num in the linked list and returns the number of instances removed. In this list 10 -> 10 -> 20 -> 30 -> 10, performing removeAll(10) will remove all three 10's and the list will look like this: 20 -> 30. Then, it will return the number of instances removed, in this case, 3. int contains(int num) This will return the position of the first instance of the element num in the list. If num is not found, return 0. In the example, having the method contains(30) will…
- If you have the following node declaration:struct Node {int number;struct Node * next;};typedef struct Node node;node *head,*newNode;Write a C program that contains the following functions to manipulate this linked list : -----function named changeFirstAndLast that swaps the node at the end of the list and the node at the beginning of the list. The function will take a list as a parameter and return the updated list.-----function using given prototype below. This function cuts the first node of the list and adds it to the end as last node. It takes beginning address of the list as a parameter and returns the updated list.node* cutheadaddlast(node* head);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…Ocaml Map functions left Writeafunctionmap_fun_left : (’a -> ’a) list -> ’a list -> ’a list = that is given a list of functions and a list of elements. For each element apply all functions from left to it and keep the result. Return the results as a list. examples map_fun_left [((+)1);( * )2;fun x->x-10] [1;2;3;4];; - : int list = [-6; -4; -2; 0] map_fun_left [(fun x->int_of_char x|> (+) 32 |> char_of_int);(fun x->char_of_int ((int_of_char x) +1))] [’A’;’B’;’C’;’D’];; - : char list = [’b’; ’c’; ’d’; ’e’]
- Topic: Singly Linked ListImplement the following functions in C++ program. Read the question carefully. (See attached photo for reference) void isEmpty() This method will return true if the linked list is empty, otherwise return false. void clear() This method will empty your linked list. Effectively, this should and already has been called in your destructor (i.e., the ~LinkedList() method) so that it will deallocate the nodes created first before deallocating the linked list itself.Problem 1: Lo Shu Magic Square The Lo Shu Magic Square is a grid with 3 rows and 3 columns. The Lo Shu Magic Square has the following properties: • The grid contains the numbers 1 through 9 exactly.• The sum of each row, each column, and each diagonal all add up to the same number. This is shown in Figure ➔➔➔ "Attached Image" In a python program, you can simulate a magic square using a two-dimensionallist. Write a function that accepts a two-dimensional list as an argumentand determines whether the list is a Lo Shu Magic Square. Test thefunction in a program. Below is the main() function and some globalconstants. You may need to define multiple functions to organize yourcode. # Global constants ROWS = 3 # The number of rowsCOLS = 3 # The number of columnsMIN = 1 # The value of the smallest numberMAX = 9 # The value of the largest numberdef main():# Create a two-dimensional list.test_list = [ [4, 9, 2],[3, 5, 7],[8, 1, 6] ] # Display the list in row and column…Question: Create a function that takes a tuple and returns a dictionary which is a histogram for counting the number of occurrences of each number in the tuple.The main program should take the dictionary, transform the elements into a list, use sort () to order the list (in ascending order) and after that display the list. Please use a picture, commentary for a better understanding and your own code thank you for the exemple, it's the picture