Solved

How do I sort a file-listing?

Posted on 1998-10-21
6
205 Views
Last Modified: 2010-03-05
I have a script that uses:
  while ($filename = readdir DIR) {
to display a directory's contents. Is there anyway to sort these results in a particular order (i.e. by date?)
0
Comment
Question by:drummond
  • 3
  • 2
6 Comments
 
LVL 84

Expert Comment

by:ozo
ID: 1205596
sub ST(&@){
         my $metric=shift;
         map {$_->[0]}
         sort {$a->[1] cmp $b->[1]}
         map {[$_,&{$metric}]} @_
}

opendir(DIR, $some_dir) || die "can't opendir $some_dir: $!";
for $filename ( ST{(stat"$some_dir/$_")[9]} readdir DIR ){
      print $filename." ".localtime((stat"$some_dir/$filename")[9])."\n"
}

0
 

Author Comment

by:drummond
ID: 1205597
That made it work REALLY well. Now how do I reverse it so that the most recent files are at the top of the list?
0
 
LVL 84

Expert Comment

by:ozo
ID: 1205598
for ( reverse ST{(stat"$some_dir/$_")[9]} readdir DIR ){
}
#or
for ( ST{ ~(stat"$some_dir/$_")[9] } readdir DIR ){
}
0
Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

 

Author Comment

by:drummond
ID: 1205599
Everything works perfectly! Now how do I give you the points?
0
 
LVL 2

Expert Comment

by:WileyKat
ID: 1205600
to get the points, ozo should post his answer as an answer instead of a comment. you can then give him the points.
0
 
LVL 84

Accepted Solution

by:
ozo earned 100 total points
ID: 1205601
sub ST(&@){
        my $metric=shift;
        map {$_->[0]}
        sort {$a->[1] cmp $b->[1]}
        map {[$_,&{$metric}]} @_
}

for( ST{ ~(stat"$some_dir/$_")[9] } readdir DIR ){ }
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I've just discovered very important differences between Windows an Unix formats in Perl,at least 5.xx.. MOST IMPORTANT: Use Unix file format while saving Your script. otherwise it will have ^M s or smth likely weird in the EOL, Then DO NOT use m…
Many time we need to work with multiple files all together. If its windows system then we can use some GUI based editor to accomplish our task. But what if you are on putty or have only CLI(Command Line Interface) as an option to  edit your files. I…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…

809 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question