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- Write a recursive Racket function "update-if" that takes two functions, f and g, and a list xs as parameters and evaluates to a list. f will be a function that takes one parameter and evaluates true or false. g will be a function that takes one parameter and evaluates to some output. The result of update-if should be a list of items such that if x is in xs and (f x) is true, then (g x) is in the list. The output list's elements should keep the input list's items in the same relative order. For example (update-if even? add1 '(1 2 3 4)) should evaluate to '(3 5) because 2 and 4 make even? true and add1 turns 2 and 4 into 3 and 5.def f(x,v): return -x**3+5*x**2-8*x+4-(v**2)*(2-x) Define v_list = np.linspace(0, 0.5, 6) and write a for loop to iterate over this list to plot the function f(x, v) for each v value in the list Your plot range of x should be between 0.8 and 2.5. Show all the graphs on the same plot; do not do plot a separate plot for each v value. v_list = np.linspace(0, 0.5, 6) x = np.linspace(0.8, 2.5) for v in v_list: plt.plot(v, f(x,v)) plt.xlim(0.8,2.5) plt.show() ı could not find error here?(a) Write a function top_students(marks) that takes as a parameter a non-empty list of (name, mark) tuples, where name is the name of a student (a string) and mark is the student's mark for some course (an int). The function returns a list of the names of all students whose mark equals that of the top student. If there is just a single student with the maximum mark, the return value will be a list of length 1, as in the first example in the table below. The names in the return list should be in the same order as in the input parameter list. Test Result marks = [('Beatrice', 50), ('Nerly', 90), ('Uniza', 70)] print(top_students(marks)) ['Nerly'] marks = [('Beatrice', 80), ('Nerly', 75), ('Uniza', 66), ('Joshua', 80)] print(top_students(marks)) ['Beatrice', 'Joshua'] (b) Write a function char_counts(string) that takes a string as a parameter and returns a dictionary in…
- Suppose you have a list of key/value pairs (i.e., a nested list where each element of the list is a (key value)pair. For example, the list might look like this: '((France Paris) (France Nice) (Spain Madrid) (Poland Krakow) (Poland Warsaw)) (Notice that the keys need not be unique for this problem.) Write a function named first-occurrence in Scheme that takes a key and a list then returns the value of the first item on the list with a matching key. Return '() if none of items on the list has a matching key. You must use either fold or reduce to do the vast majority of the work. You may use the built-in foldmethod by adding the line (require 'list-lib), or you can use your own implementation. The built-in fold function has parameters in this order: action partial-result lst. You may assume that the list contains an element with the key to be updated. For example, (first-occurrence 'Germany '((France Paris) (Germany Bonn) (Germany Berlin))) should return 'Bonn (first-occurrence 'Poland…The library function init removes the last element from a non-empty list; for example, init [1,2,3,4,5] = [1,2,3,4]. Show how init could similarly be defined in two different ways.? Explain each definitionpython code Write a recursive function such that, given a list of intergers (say v) and an integer value (say x), the function returns resulting subset if there is a subset of intergers in v that sum up to x. Otherwise the function returns an empty list; Also write a sample code that runs this function using an example list and value x, and state the expected result
- Write a function in a racket code that takes as input a list of elements and returns a list with elements and their position after. For example, if the input to the function is (list ’a ’b ’c) then it will return (list a 1 b 2 c 3). Make sure to use recursionSuppose we have a singly linked list implemented with the structure below and a function that takes in the head of the list.typedef struct node{int num;struct node* next;} node;int whatDoesItDo (node * head){struct node * current = head;struct node * other, *temp;if (current == NULL)return head;other = current->next;if (other == NULL)return head;other = other->next;temp = current->next;current->next = other->next;current = other->next;if (current == NULL){head->next = temp;return head;}other->next = current->next;current->next = temp;return head;}If we call whatDoesItDo(head) on the following list, show the list after the function has finished.head -> 1 -> 2 -> 3 -> 4 -> 5 -> 6 -> 7In Kotlin A. Write a function lengthGreaterThan() with an expression body that takes a String s and an Int n and returns true if the String is at least n characters long. Then revise the function so that it can accept null values. If it receives null as the parameter, it should return false. B. Write a recursive function with an expression body that takes a list of nullable Strings and and Int an returns a list of just the Strings from the original list for which the function you wrote in the first part returns true C. Get the same result as in part B by using filter()
- Subtract 10 from all list entries without any looping in the haskell programming language. Use of map and fmap Furthermore, let us suppose that there are two distinct lists.in c++, apply non-linear data structures to solve simple problems. Question - imagine having a List L1,delete all the nodes having even numbers into info part from the list L1 and insert into List L2 and all the numbers having odd numbers into list L3. (Drop coding in words with screenshot of output as well)in c++ language , apply non-linear data structures to solve simple problems. Question - imagine having a List L1 in c++ ,delete all the nodes having even numbers into info part from the list L1 and insert into List L2 and all the numbers having odd numbers into list L3. (Drop coding in words with screenshot of output as well)