Here's a solution using the so-called Schwartzian transform
for sorting the keys (the leading "C" is stripped off, and the the key list is sorted by the number before the dash, and then by the number after the dash:
#!/usr/bin/perl
use warnings;
use strict;
my %keys;
$keys{'C10'}->{'C10-1'}=1;
$keys{'C10'}->{'C10-2'}=1;
$keys{'C10'}->{'C10-20'}=1;
$keys{'C10'}->{'C10-3'}=1;
$keys{'C200'}->{'C200-1'}=1;
$keys{'C200'}->{'C200-20'}=1;
$keys{'C200'}->{'C200-3'}=1;
$keys{'C200'}->{'C200-21'}=1;
$keys{'C30'}->{'C30-1'}=1;
$keys{'C30'}->{'C30-2'}=1;
$keys{'C30'}->{'C30-30'}=1;
$keys{'C30'}->{'C30-4'}=1;
sub sorted {
return map { $_->[0] }
sort {
$a->[1] <=> $b->[1] ||
$a->[2] <=> $b->[2]
} map { [ $_, split("-", substr($_,1)) ] } @_;
}
foreach my $key (sorted(keys %keys)) {
print "'$key' => ", $keys{$key}, "\n";
foreach my $subkey (sorted(keys %{$keys{$key}})) {
print " '$subkey' => $keys{$key}->{$subkey}\n";
}
}
Arjen
-
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.
|