You mentioned portability was a requirement, so you should use File::Spec to build paths. "/" is not the file seperator on Macs, for example.
I have a script that needs to determine the oldest file in a particular directory
If all you're concerned about is which file is the oldest, there's no need to sort:
sub get_oldest {
my ($dir) = @_;
my $oldest;
my $oldest_time;
my $file_spec = File::Spec->catfile($dir, '*.pl');
foreach (glob $file_spec") {
my $time = (stat $_)[10];
if (!$oldest_time || $time < $oldest_time) {
$oldest = $_;
$oldest_time = $time;
}
}
return $oldest;
}
I don't know how efficient glob is. You can get rid of it:
use DirHandle ();
use File::Spec ();
sub get_oldest {
my ($dir) = @_;
my $oldest;
my $oldest_time;
my $dh = DirHandle->new($dir);
while (defined($_ = $dh->read())) {
next unless (/\.pl$/i);
my $full_path = File::Spec->catfile($dir, $_);
my $time = (stat $full_path)[10];
if (!$oldest_time || $time < $oldest_time) {
$oldest = $_;
$oldest_time = $time;
}
}
return $oldest;
}
-
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.
|