Recursive Functions 1. Without looking at the standard prelude, define the following library functions using recursion: o Decide if all logical values in a list are true: and [Bool] -> Bool o Concatenate a list of lists: concat: [[a]] -> [a] o Produce a list with n identical elements: replicate :: Int -> a => [a] o Select the nth element of a list: (!!) [a] -> Int -> a o Decide if a value is an element of a list: elem: Eq a => a => [a] -> Bool

Recursive Functions 1. Without looking at the standard prelude, define the following library functions using recursion: o Decide if all logical values in a list are true: and [Bool] -> Bool o Concatenate a list of lists: concat: [[a]] -> [a] o Produce a list with n identical elements: replicate :: Int -> a => [a] o Select the nth element of a list: (!!) [a] -> Int -> a o Decide if a value is an element of a list: elem: Eq a => a => [a] -> Bool

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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