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Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Pls do fast within 10 minutes it's urgent and i will give like for sure Solution must be in typed form /* QUESTION 2: Min/Max and Evens/Odds */ /* Implement min and max functions using fold_left An empty list has no minimum or maximum value, therefore, return undefined. */ const ls_min = ls => /** **/ undefined; /** **/ const ls_max = ls => /** **/ undefined; /** **/ assert(ls_min(ls) == 1); assert(ls_max(ls) == 5); /* Implement two functions that return evens and odds from a list of integers using filter */ const ls_evens = ls => /** **/ undefined; /** **/ const ls_odds = ls => /** **/ undefined; /** **/ assert(ls_evens(ls).equals(List([2,4]))); assert(ls_odds(ls).equals(List([1,3,5]))); /* Using function composition, implement a function that returns the maximum number in the even subset of a given list and another function that returns the minimum number in the evens. Recall the definition of compose below: */ function compose(f, g) { return (x) => { return f(g(x)); }; } const max_even = ls => /** **/ undefined; /** **/ const min_even = ls => /** **/ undefined; /** **/ assert(max_even(ls) == 4); assert(min_even(ls) == 2)

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