Answered: In SML, combine the two separate code…

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

fun member(x,[]) = false
|   member(x,b::y) =
       if x=b then true
       else member(x,y);
fun union([],y) = y
|   union(a::x,y) =
       if member(a,y) then union(x,y)
       else a::union(x,y);

In SML, combine the two separate code and rewrite into a single function named union that returns the union of two lists.

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