This is the script I have so far. 
#!/usr/bin/perl -w
use strict;
use warnings;
use Text::ParseWords;
use POSIX qw/strftime/;
use Excel::Writer::XLSX;

my $dir = "/home/vlr/archive/";
my $date = "20211201";

# Check directory for relevant files
opendir(DIR, $dir) or die "Could not open ".$dir."\n";
my @dir = grep(/^USRINF.*.$date.*.1700.txt$/, readdir DIR);
closedir DIR;

my %btssec;

foreach $_(sort @dir){
    my $DFile = $dir.$_;
    print "Processing: ".$DFile."\n";
    # Open Data File and parse each line
    open my $DF, '<', $DFile or die "Can't open $DFile $!";
    foreach $_ (<$DF>){
        chomp( $_ );
        if((length $_ > 0)&&($_ =~ /^\d{15}/)){
            $_ =~ s/\s+/;/g;
            my($imsi,$mdn,$sec) = (quotewords('[\t;]+|,\s', 0, $_))[0,
+1,3];
            if((($imsi =~ /^\d{15}/)&&($imsi =~ /^(702|310)/))&&(($mdn
+ =~ /^\d{10}/)&&($mdn =~ /^(501)/))){
                #print $imsi.",".$mdn.",".$sec."\n";

=pod  # The part below is the part of the script I need help with to p
+rocess the parsed data whose output I'm posted as the snippet to proc
+ess.

                if(!exists($btssec{$sec})){
                    print "New key:" . $sec ."\n";
                    $btssec{$sec} = $mdn;
                }elsif(exists($btssec{$sec})){
                    #push( @{$btssec{$sec}}, $mdn );
                }
=cut
            }
        }
    }
    close $DF;
    
    print "$_\n" for keys %btssec;
}

[download]
For now, the script I have in POD sucks it's not doing what I thought it would do. (sigh).

In reply to Re^3: Parse file and creating hashes by PerlMonger79
in thread Parse file and creating hashes by PerlMonger79

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