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

A given list of numbers can have its alternating sum calculated using the `sum_alt` function. Here's…

Answered: Write a function sum_alt that takes a…

C++ Programming: From Problem Analysis to Program Design

8th Edition

ISBN:9781337102087

Author:D. S. Malik

Publisher:D. S. Malik

Chapter17: Linked Lists

Section: Chapter Questions

Problem 18PE

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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
Code in python Given a list, L, the function front_two creates a new list of length 2 out of the first two items in L as follows: In the new list, the second item becomes the first item, and the first item becomes the second. If L contains only one item, the first item in the new list should be the value None. If L is empty, both items in the new list should be value None. The function returns the new list. For example: Test Result L = ['a', 'b', 'c', 'd'] print(front_two(L)) ['b', 'a'] L = [] print(front_two(L)) [None, None] L = [5, 2] print(front_two(L)) [2, 5] L = [7] print(front_two(L)) [None, 7]
Most common names Write a function mostCommonName(L:List[str]) -> List[str] that takes a list of names (such as ["Jane", "Aaron", "Cindy", "Aaron"], and returns the most common name in this list (in this case, "Aaron"). If there is more than one such name, return a list of the most common names, in any order. That is, mostCommonName(["Jane", "Aaron", 'Jane", "Cindy", "Aaron"]) returns, for example, the list ["Aaron", "Jane" ]. If the input list is empty, return an empty list. Also, names are case- sensitive i.e. "Jane" and "JANE" are different names. assert set (mostCommonName(["Jane", "Aaron", "Jane", "Cindy", "Aaron"])) == set ( ["Ai assert set (mostCommonName(["A", "B", "C", "a", "B"])) set(["B"]) assert mostCommonName([]) == [] Your Answer: 1 # Put your answer here 2 Submit ==
two_sum is a Python function that takes in a list of integers (elements) and an integer number (num) and returns True if there exist two values in elements that add up to num, otherwise, function returns False. def two_sum(elements: List[int], num: int): for i in range(len(elements)): for j in range(i + 1): if elements[i] + elements[j] == num: return True return False Study above function and answer below questions: A. What is time complexity of two_sum? B. Is it possible to improve on above algorithm performance (in terms of its asymptotic cost)? If yes, describe your algorithm, be detailed as much as possible.
The mapped list pattern Our second pattern is the mapped list pattern, described in video 4 3 mapped list pattern. Often we need to write a function that takes a list as a parameter and returns a new list in which each item in the original list is "mapped" to a new item in the result list. For example, the following function takes a list of numbers as a parameter and returns a list of all the numbers squared, e.g. squares ( [1, 3, 7]) returns [1, 9, 49]. def squares (nums): "Returns the squares of the given numbers""" result = [] for num in nums: result.append (num * num) return result Although this is just a special case of the accumulator pattern, it is so common that we give it its own name: the mapped list pattern. Consider the following function: def squares(nums): ""Returns the squares of the given numbers""" result = [] for num in nums: result.append (num * num) return result If the main program calls print(squares ( [5, -3, 2, 7]) what is the state table for the function…
emacs/lisp function Write a function that takes one parameter that is a list of numbers and returns true (t) if all the elements of the list are multiples of the first one and nil otherwise. This said, a list generated by the function make-multiples could be passed to this new function and the result should be true. On the other hand, show an example of a list that could not have been generated by the first function for which the result is still true.
a- Write a Python function Salary_levels, that takes a list as an argument and returns the number of the high salaries (salary>=5000), the average salaries(1000<=salary<5000, and the low salaries (salary<1000). You can use the following list : salaries= [500,1070,1450,6500,9000,940,450,400,600,2750,1100,8400,1500,900,1200] b- Use the above function to print the counts of the high, average, and low salaries. N.B: the codes of parts a and b should be included in your answer.
nums = [9,-8,7,-6,3,2,-1,3,10,9] Use enumerate to iterate through the index and values of the nums list, and output the index where userNum is found. For example, if userNum is 3, your output should be: Number 3 found at index 4 Number 3 found at index 7
create a function my_code(u) that sorts a list of words alphabetically using a FOR loop. example: my_code(u) will output the list ['apple', 'bear', 'cat', 'dog'] u = "dog cat bear apple"
Write a function called chop_list that takes a list, modifies it by removing the first and last elements, and return a list. For example: list1=[1,2,3,4,5] -> chop_list( list1) =[2,3,4] list2=["a", "b", "e", "f") -> chop_list( list2) =["b","e"]
Using the ListNode structure introduced in this chapter, write a function void printFirst(ListNode *ptr)that prints the value stored in the ﬁrst node of a list passed to it as parameter. The function should print an error message and terminate the program if the list passed to it is empty.
Exercise 2 Write a function called cumsum that takes a list of numbers and returns the cumulative sum; that is, a new list where the ith element is the sum of the first i+1 elements from the original list. For example: >>> t = [1, 2, 3] >>> cumsum(t) [1, 3, 6]

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