Dear monks,

I am having trouble parsing my records and then sorting them. When sorting my records I get a an error at line 22 in my code. It looks like this. 

use strict;
use warnings;
my $fin = "SELECTDAT2";
my $fout = "myfile";
open my $ih, '<', $fin or die "cannot open $fin for reading, $! ";
open my $oh, '>', $fout or die "cannot open $fout for writing, $! ";
my @records;
my @list;
while (<$ih>) {
my @tokens = split;
my $SEC1 = $tokens[3];
my $LAT = $tokens[4];
my $LONG = $tokens[5];
my $DEPTH = $tokens[6];
my $NO = $tokens[10];
my $GAP = $tokens[11];
for $_ (@list) {
my ($SEC1, $LAT, $LONG, $DEPTH, $NO, $GAP) = parse_record($_);
push @records, [ $SEC1, $LAT, $LONG, $DEPTH, $NO, $GAP ];
}
#sort by LONG (index 0=NO, 1=SEC1, 2=LONG, 3=LAT, 4=DEPTH, 5=GAP)
my $nextline = <$ih>;
$records = \@records;
my @sorted_recs = sort { $records {$a} <=> $records {$b} } @records;
my $y = $tokens[0], my $m = $tokens[1], my $d = $tokens[2], my $h = $t
+okens[3];
sub events {
my (@list);
my $nextline = <$ih>;
foreach $nextline (@list) {
my @tokens = split;
my $SOURCE = $tokens[0];
my $PSEC = $tokens[3];
my $PQ = $tokens[4];
my $SSEC = $tokens[7];
my $SQ = $tokens[8];
last if $nextline eq "";
push (@list, $_);
}
return @list;
}
last if eof();
for my $rec (@sorted_recs) {
my ($NO, $SEC1, $LONG, $LAT, $DEPTH, $GAP) = @$rec;
print $oh "$NO\n", events(@list), "\n", "$SEC1, $LONG, $LAT, $DEPTH, $
+GAP\n";
}
}
close ($oh);
close ($ih);Global symbol "$records" requires explicit package name at
+ - line 22.
Global symbol "$records" requires explicit package name at - line 22.

[download]

I was advised to use $$records($a)(2) <=> $$records($b)(2) and I am having trouble understanding the use of $$records and how to correct this error. I would really appreciate some advice and help.

In reply to Parse variables by velocitymodel

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