G'day jasonl,

You show no indication of what <data2> contains. I assume they're not unique values as you've used it as a key for an array (@{$myHash{$data2}{info}}). You don't say how many elements this array might hold, if you want to sort on <data2> nor whether <data2> needs to appear in the output.

A representative, unordered sample of the input as well as how you'd expect that to be output would have been helpful.

The following script may provide some help in formulating your solution: 

#!/usr/bin/env perl -l

use strict;
use warnings;

use Time::Piece;

my %myHash;
my $format = '%m/%d/%Y %H:%M:%S';

while (<DATA>) {
    my ($date, $time, $data1, $data2) = split;
    my $sort_key = Time::Piece->strptime("$date $time", $format)->epoc
+h;
    push @{$myHash{$data2}{info}}, "$sort_key:$date,$time,$data1";
}

for my $key (sort keys %myHash) {
    print "$_,$key" for
        map { $_->[1] }
        sort { $a->[0] <=> $b->[0] }
        map { [ split /:/, $myHash{$key}{info}[$_], 2 ] }
        0 .. $#{$myHash{$key}{info}};
}

__DATA__
01/14/2014 23:44:14 A Y
01/14/2014 23:44:12 B Y
01/14/2014 23:44:13 C X
01/14/2014 23:44:12 D X

[download]

Output:

01/14/2014,23:44:12,D,X
01/14/2014,23:44:13,C,X
01/14/2014,23:44:12,B,Y
01/14/2014,23:44:14,A,Y

[download]

If you provide a better description of your problem, a better solution can probably be provided. The guidelines in "How do I post a question effectively?" may help you with this.

-- Ken

In reply to Re: sorting logfiles by timestamp by kcott
in thread sorting logfiles by timestamp by jasonl

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