We flatten a list L by first removing all lists within L and replacing them with their members. Write a Prolog rule flattenit/2 which flattens a list. Note: there is a built-in called flatten - you should not use that in your answer. For example: :- flattenit([a,b,c,[d,e],f,[c, a, b]], [a,b,c,d,e,f,c,a,b]). :- flattenit([1,2,3,4,[5,6,[7,8]]], [1,2,3,4,5,6,7,8]). :- flattenit([1,2,[3,4,[5,6],7],8,[2,4,5,8]], [1,2,3,4,5,6,7,8,2,4,5,8]).

We flatten a list L by first removing all lists within L and replacing them with their members. Write a Prolog rule flattenit/2 which flattens a list. Note: there is a built-in called flatten - you should not use that in your answer. For example: :- flattenit([a,b,c,[d,e],f,[c, a, b]], [a,b,c,d,e,f,c,a,b]). :- flattenit([1,2,3,4,[5,6,[7,8]]], [1,2,3,4,5,6,7,8]). :- flattenit([1,2,[3,4,[5,6],7],8,[2,4,5,8]], [1,2,3,4,5,6,7,8,2,4,5,8]).

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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Question

PROLOG LANGUAGE
We flatten a list L by first removing all lists within L and replacing them with their members. Write a
Prolog rule flattenit/2 which flattens a list. Note: there is a built-in called flatten - you should not use
that in your answer.
For example:
:- flattenit([a,b,c,[d,e],f,[c, a, b]], [a,b,c,d,e,f,c,a,b]).
:- flattenit([1,2,3,4,5,6,[7,8]]], [1,2,3,4,5,6,7,8]).
:- flattenit([1,2,[3,4,[5,6],7,8,[2,4,5,8]], [1,2,3,4,5,6,7,8,2,4,5,8]).

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