Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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- Given the definition in Haskell: fmap :: (a -> b) -> [a] -> [b] fmap g xs = reverse (map g xs) With Functor law: (fmap g . fmap h) xs = fmap (g . h) xs Using list xs :: [Int], prove the definition does not satisfy the law:arrow_forwardStudy the following definition of function "Secret" and answer the question below. int Secret (int numl, int num2) if (numl 0) 0; i <= num2; i++) + i; for (int i numl = numl return num%3; return 0%3; What is the output of the following code segment? cout<arrow_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_forwardChange two lines of code of: def solution(A, K): n = len(A) for i in range(n - 1): if (A[i] + 1 < A[i + 1]): return False if (A[0] != 1 and A[n - 1] != K): return False else: return True SO that it solves the question : you are given a implementation of a function def solution (A,K) This function, given a non-empty array A of N integers (sorted in non-decreasing order) and integer K, checks whether A contains numbers 1,2..K (every numbers from 1 to K at least once and no other numbers (for example given array A, K=3 ; A(0)=1, A(1)=1, A(2)=2, A(3)=3, A(4)=3 then the function should return True while for the following array A, K=2; A(0)=1, A(1)=1, A(2)=3 then the function should return False.) Assume that: -N and K are integers within the range (1....300,000) -each element of array A is an integer within the range (0...1,000,000,000) -array A is sorted in non-decreasing orderarrow_forwardQuestion 4 Full explain this question and text typing work only thanksarrow_forward2. Write a function that multiplies a polynomial by a constant (or scalar). scale :: (Num a, Eq a) => a -> Poly a -> Poly a For example: > scale 2 (P [-1,0,1]) P [-2,0,2] > scale e (P [0,0,2]) P[]arrow_forwardarrow_back_iosarrow_forward_ios
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