Dear Monks - I'm having a problem with a another problem that I experienced before. I have three different text files. One is a master file, one is a delete file and another is a add file. I need to remove the contents of the deleted file from the master file and add the contents of the add file to the new master file. I figured this would be fairly trivial given what I learned from my previous problem and yet I can't get this to work. 
#!/usr/bin/perl -w

use strict;

my $dir = "/foo/";

my $raw_file = $dir."sample_qw_zips.txt";
my $delete_file = $dir."sample_qw_deletes.txt";
my $add_file = $dir."dsl_capable_add_0615.txt";

my %delete = ();

open (DELETE_FILE, "< $delete_file")
    or die "Can't open $delete_file: $!\n";

open (RAW_FILE, "< $raw_file")
    or die "Can't open $raw_file: $!\n";

open (OUTPUT, "> output.txt")
    or die "Can't open OUTPUT: $!\n";

#populate delete hash 
while (my $deleted_zip = <DELETE_FILE>) {
    chomp $deleted_zip;
    $delete{$deleted_zip} = 1;
}

while (my $raw_zip = <RAW_FILE>) {
    chomp $raw_zip;
    # strings in a weird place in a weird place
    my $zip = substr($raw_zip, 3, 9);
    # maybe use an unless statement
    if (exists $delete{$zip}) {
        # don't do anything
    } else {
        print OUTPUT $raw_zip, "\n";
    }
}

close DELETE_FILE;
close RAW_FILE;    
close OUTPUT;

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You'd think after all these years I would be more comfrtable with hashes. Nope. Thanks.

In reply to A Problem With Hashes and Keys by bivouac

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