I don't know what underlying perl mechanics I'm potentially violating (update: I meant in generating union, everything else should be jake), but the following seems to work. There's no idea here that wasn't in your original post; in fact I referred to it frequently when writing this up.
#!/usr/bin/env perl
use strict;
use warnings;
my @array1=(1..5);
my @array2=(3..7);
my (%union, %sdiff, %sd1, %sd2, %inter);
@union{(@array1,@array2)} = (@array1,@array2);
%sd1 = %sd2 = %inter = %union;
delete @sd1{@array2};
delete @sd2{@array1};
%sdiff = (%sd1,%sd2);
delete @inter{keys %sdiff};
print "array1: ", join (" ", @array1), "\n";
print "array2: ", join (" ", @array2), "\n";
print "union: ", join (" ", keys %union), "\n";
print "sdiff: ", join (" ", keys %sdiff), "\n";
print "inter: ", join (" ", keys %inter), "\n";
It felt like I was writing either haiku or APL, but I can't quite say which....
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.