The other solutions are nice, but if you want a more efficient algorithm then it is indeed possible to avoid the sort. An O(N) algorithm is:
#!/usr/bin/perl -w
use strict;
use Data::Dumper;
my %hash = (
Matt => 24, Dana => 19, Eric => 28, Sara => 20, John => 17, Mi
+ke => 23,
);
if (%hash)
{
my (@min, @max);
while( my ($k,$v) = each %hash )
{
@min = ($k,$v) unless @min && ($v > $min[1]);
@max = ($k,$v) unless @max && ($v < $max[1]);
}
$hash{$min[0]} = $max[1];
$hash{$max[0]} = $min[1];
}
print Dumper \%hash;
--Dave
-
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.
|