Time::Local is core and faster than Date::* functions
use Time::Local qw( timelocal );
use strict;
my @input = reverse qw(
Order_29May11:05.bak
Order_11Jun20:25.bak
Order_10Jun14:16.bak
Order_10Jun16:04.bak
); # reversed to prove it works since they are already sorted
my @months = qw( Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec );
my %months;
for (0 .. $#months) {$months{$months[$_]} = $_}
# merlyn's definition of the
# Schwartzian Transform
# changed to numerical sort
my @output =
map { $_->[0] }
sort { $a->[1] <=> $b->[1] }
map { [$_, expensive_func($_)] }
@input;
print join "\n", @output;
exit;
sub expensive_func {
# convert filename to date
$_[0] =~ /Order_(\d+)(...)(\d+):(\d+)\.bak/
or die "bad filename $_[0]";
return timelocal(0, $4, $3, $1, $months{$2}, 0);
}
__OUTPUT___
Order_29May11:05.bak
Order_10Jun14:16.bak
Order_10Jun16:04.bak
Order_11Jun20:25.bak
--
flounder
-
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.
|