Hi all,

Wondering if I could get some assistance.

Deleting paragraphs based on match in a hash.

Where I'm lost is getting the 'key' (PORNUM: *key*) from the paragraph in $_.

I'm very new to Perl, just a few long days/nights ... whatever they are!

#!/usr/bin/perl

my @a, %hash;
my $file = shift;
open(list, "< $file") or die;
chomp( @a=<list> );
close(list);
@hash{@a}=@a;

$/ = "";

# Example data
#
# $ cat hash
#  PP22x43@.5
# $ cat data
#  \n
#  Random lines
#  PORNUM: PP22x43@.5
#  Random lines
#  \n
#  Random lines
#  PORNUM: PC12x120/25

while (<>) {

## manual test #  print if !m/PORNUM: PP22x43@.5/ms;

  print unless exists $hash{  }
}
exit(0);

[download]
Example data.
Example exclude file (No blank lines) 
PORNUM: PP22x43@.5
PORNUM: PC12x120/25

[download]
Example data file (Records have a leading blank line, first line is blank) 
random lines of data
PORNUM: PC21x21!2
random lines of data

random lines of data
random lines of data
PORNUM: PP22x43@.5
random lines of data

PORNUM: PP12x60@1
random lines of data
random lines of data

random lines of data
PORNUM: PC12x120/25

[download]
Thanks Gary

In reply to Deleting paragraphs based on match in a hash by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
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