First of all, those are colons, not semicolons. ;-) Sounds like a good place for a Schwartzian Transform by our own merlyn:
#!/usr/bin/perl
use strict;
use warnings;
my @data = <DATA>;
chomp @data;
my @sorted = map { $_->[0] }
sort { $a->[1] cmp $b->[1] }
map { [ $_, (split /:/)[1] ] } @data;
print "data = \n@data\n";
print "sorted = \n@sorted\n";
__DATA__
area1:place1:name1
area1:place4:name2
area3:place3:name3
area5:place2:name2
Produces:
data =
area1:place1:name1 area1:place4:name2 area3:place3:name3 area5:place2:
+name2
sorted =
area1:place1:name1 area5:place2:name2 area3:place3:name3 area1:place4:
+name2
Update:For more information on the Schwartzian Transform, read Tom Christiansen's "Far More Than Everything You've Ever Wanted To Know About Sorting" paper.
Update 2:Changed example data to make it more obvious what was going on.
-
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.
|