Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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- ML / SML Code only please! If ELSE FORMAT. DO NOT COPY USE THE OTHER ANSWERS ON CHEGG. THEY'RE WRONG. Write a function delnthc to delete the n-th character of a string. You may assume that the input string is always longer than n.delnthc("abcdef", 4) → "abcef" Write a function multin to take a list of three [a,b,c] and multiplies a by b c times. Function definition must look like multin(L)! CAN NOT USE multin(a,b,c). You have to use let-in-end in if-then-else style NOT @CAN NOT USE function power(a,b) =a*a*a...,multin [2,3,5] → [2,6,18,54,162,486] Write a function pairStar to form a new string where identical chars thatare adjacent in the original string are separated from each other by a "*"pairStar("xxyy") → "x*xy*y", pairStar("aaaa") → "a*a*a*a"arrow_forward2. A positive integer is perfect if it equals the sum of all of its factors, excluding the number itself. Using a list comprehension, define a function perfects :: Int -> [Int] that returns the list of all perfect numbers up to a given limit. For example: > perfects 500 [6,28,496] Many variations of this exercise are possible: o A number which is less than the sum of its proper divisors is called abundant. o A number which is greater than the sum of its proper divisions is called deficient. o A number for which the sum of all its divisors (including itself) is greater than the sum of the divisors of any smaller number is called highly abundant. For each of these variations, write a function which finds all the numbers with the stated property below a given number.arrow_forwardThis is a free form programming assignment where you are: Required to create a simple phone book application Asked to make a choice of appropriate data structure and implementation. Defend your selection and explain the efficiency of your program using Big(O) notation.You do not need to create data structures from scratch. You are free to use datastructures available in the standard template C++ library. For example std::stack<int> orstd::set<int> , std::maps<int,int>, etc. You have familiarity with these from your CodeStep by Step labs. You are not permitted to use simple arrays. SpecificationsCreate a phone book program that stores and manages contact information.Contact information is name and corresponding phone number. The program reads thisinformation for multiple contacts from a data file “contacts.txt” and saves them in asuitable data structure. Once the data is stored, it allows the user to display all contacts,add a single contact, remove a contact,…arrow_forward
- Write a function nth_largest that takes any list of numbers num_lst and a positive integer n, and that returns the nth largest element in num_lst. For example, if lst = [-4, -5, 1, 6, 2, -7, 5], then nth_largest(lst, 2)should return 5 and nth_largest(lst, 5) should return-4.arrow_forwardComplete the given CPP function definition and run it for a test case. void swapString(string &str, int i, int j) { //check whether i and j are in the range //0 to str.length ()-1 and i is less than j. //if the conditions are true then swap the //characters at index i and j in the string. }arrow_forward*Data Structures (a) The function g(n) is a/an [?] bound on f(n). A. upper B. tight C. lower (b) The function f(n) is a/an [?] bound on g(n). A. upper B. tight C. lower (c) The function g(n) is a/an [?] bound on h(n). A. upper B. tight C. lower (d) The function j(n) is a/an [?] bound on g(n). A. upper B. tight C. lower (e) The function h(n) is a/an [?] bound on k(n). A. upper B. tight C. lower (f) The function k(n) is a/an [?] bound on f(n). A. upper B. tight C. lowerarrow_forward
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- Program in Carrow_forwardWhich of the following is the definition of a higher-order function? func xs = sum (map (^2) xs) func x = x * 2 func (x,y) = (y,x) func (x:y:zs) = y func f [x,y] = [f x, f y]arrow_forwardDefine a function named check_game_finished (encrypted_list) which takes a list of characters as a parameter. The function returns True if the game is over, and False otherwise. The game is over when there is no longer any "*" characters in the parameter list. For example: Test Result False True data = ['h', '*', ¹*¹, ¹*¹, ¹*'] print(check_game_finished (data)) data = ['h', 'e', '1', '1', 'o'] print(check_game_finished(data)) data = ['s', ¹*¹ 'd'] False print(check_game_finished (data))arrow_forward
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