Solved

Sorting readdir results by date

Posted on 2002-05-16
4
1,608 Views
Last Modified: 2010-08-05
Hi,

I'm reading a number of daily log files and displaying their contents. The log entries in the files are ordered by date no problem. However I would like the files to be ordered on my page so that the most recent appears at the top. When reading the filesnames from the directory using readdir is there some way of sorting the results by the last modified date on the file?

This is what I have so far:

# Open directory handle for log directory
opendir(DIR, "log") || print "open dir error: $!";

# Read the log files in the directory into array
@files = grep( /\.log$/i , readdir( DIR) );

foreach $file(@files)
{
  # Print log file name
  print "<h3>$file</h3>\n";

  # Open log file
  open (IN1,"log/$file");

  # Write log file contents
  while (<IN1>)
  {
    print "$_<br>\n";
  }

  # Close log file
  close IN1;

}
0
Comment
Question by:AndyReed
  • 2
4 Comments
 
LVL 4

Expert Comment

by:dda
ID: 7015619
I can suggest to use stat() for getting the date and hash for storing filenames and last modified date. You can't do it with readdir() only.
0
 
LVL 84

Accepted Solution

by:
ozo earned 50 total points
ID: 7015675
@files =
    map{(split/ /,$_,2)[1]}
    sort
    map{sprintf"%8x %s",~(stat)[9],$_}
    grep{/\.log$/i}
    readdir DIR;
0
 
LVL 4

Expert Comment

by:dda
ID: 7015697
wow!
0
 

Author Comment

by:AndyReed
ID: 7015905
~(stat)[9] doesn't appear to be working. It returns 0 for each file. I'm afraid I don't understand the ~ Does it call stat with the last value of $_ ? If so then I don't think its working. Do you need 'use' something use this form?

Almost there, your solution works if I use
   map{sprintf"%8x %s",(stat(_$))[9],$_}
but obviously I don't get the filename in the second field.

Many Thanks,
Andy.
0

Featured Post

ScreenConnect 6.0 Free Trial

Check out the updates in one game-changing release, ScreenConnect 6.0, based on partner feedback. New features include a redesigned UI that improves session organization and overall user experience. See the enhancements for yourself!

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Perl script to parse xml file 2 114
Port 80 requests 16 96
Perl Script to read file contents, make changes, and build new file 7 115
perl syntax 3 4
Email validation in proper way is  very important validation required in any web pages. This code is self explainable except that Regular Expression which I used for pattern matching. I originally published as a thread on my website : http://www…
In the distant past (last year) I hacked together a little toy that would allow a couple of Manager types to query, preview, and extract data from a number of MongoDB instances, to their tool of choice: Excel (http://dilbert.com/strips/comic/2007-08…
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…
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.

810 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