Ocaml Explode list Write a function explode_list : string list -> char list = that given a string list it returns a character list of all exploded strings. The problem can be done linearly (O(n)). Avoid repeatedly using @ and similar list merges for maximum points. Examples explode_list ["ab";"cde";"f";"";"ghij"];; - : char list = [’a’; ’b’; ’c’; ’d’; ’e’; ’f’; ’g’; ’h ’; ’i’; ’j’]

Write a function sum_alt that takes a list of numbers zand calculates their alternating sum, defined as n-1 Σ(-1)+1 zk. k=0 Here Zo, Z1, Zn-1 denote the individual elements of the list.

Write a user defined function named as “length_list” function that finds the length of a list of list_node_t nodes. This code should fit with the following code.Partial Code: #include <stdio.h> #include <stdlib.h> /* gives access to malloc */ #define SENT -1 typedef struct list_node_s { int digit; struct list_node_s *restp; } list_node_t; list_node_t *get_list(void); int main(void) { list_node_t *x;int y; x=get_list(); printf("%d\n",x->digit); printf("%d\n",x->restp->digit); printf("%d\n",x->restp->restp->digit); // your length_list function should be called from here printf("Length is: %d",y); } /* * Forms a linked list of an input list of integers * terminated by SENT */ list_node_t * get_list(void) { int data; list_node_t *ansp; [20]scanf("%d", &data); if (data == SENT) { ansp = NULL; } else { ansp = (list_node_t *)malloc(sizeof (list_node_t)); ansp->digit = data; ansp->restp = get_list(); } return (ansp);

Write a function in_list that will take as its parameters an input list called mylist and a number. If the number is in the list the function should retun true, ottherwise, it should retun false. def in_list(mylist,number):

• find_last(my_list, x): Takes two inputs: the first being a list and the second being any type. Returns the index of the last element of the list which is equal to the second input; if it cannot be found, returns None instead. >> find_last(['a', 'b', 'b', 'a'], 'b') 2 >>> ind = find_last(['a', 'b', 'b', 'a'], 'c') >>> print(ind) None

Exercise 3 Write a function called middle that takes a list and returns a new list that contains all but the first and last elements. For example: >>> t = [1, 2, 3, 4] >>> middle(t) [2, 3]

LAB: Playlist (output linked list) Given main(), complete the SongNode class to include the function PrintSongInfo(). Then write the PrintPlaylist() function in main.cpp to print all songs in the playlist. DO NOT print the head node, which does not contain user-input values. Ex: If the input is: Stomp! 380 The Brothers Johnson The Dude 337 Quincy Jones You Don't Own Me 151 Lesley Gore -1 the output is: LIST OF SONGS ------------- Title: Stomp! Length: 380 Artist: The Brothers Johnson Title: The Dude Length: 337 Artist: Quincy Jones Title: You Don't Own Me Length: 151 Artist: Lesley Gore

struct node{int num;node *next, *before;};start 18 27 36 45 54 63 The above-linked list is made of nodes of the type struct ex. Your task is now to Write a complete function code to a. Find the sum of all the values of the node in the linked list. b. Print the values in the linked list in reverse order. Use a temporary pointer temp for a and b. i dont need a full code just the list part

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 destructor to List. ~ List () {      for (int i = 0; i <size (); i ++)       {             pop_back ();          } } What problems does the destructor have? Select one or more options: 1. There are no parameters for the destructor. 2. The return value from pop_back (if any) is nerver handled. 3. The destructor will create a stack overflow. 4. The destructor will create dangling pointers. 5.The destructor will create memory leaks. 6.The destructor will create undefined behavior (equivalent to zero pointer exception). 7.The condition must be: i <size () - 1 8. There is at least one problem with the destructor, but none of the above.

Exercise 4 Write a function called chop that takes a list, modifies it by removing the first and last elements, and returns None. For example: >>> t = [1, 2, 3, 4] >>> chop(t) >>> t [2, 3]