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ignoring some fields in a comparision of hashes

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Chas Owens
February 7, 2002 10:17
ignoring some fields in a comparision of hashes
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I have two hashes (%a and %b) that contain data for one person from two
different systems and I want to compare these hashes to see if the
systems are out of sync.  The catch is I know that some of the fields
will always be different and I want to ignore those fields.  Below is my
solution, does anyone have a better way of doing this? BTW: there are a
lot of fields currently with more being added as time goes on and the
number of fields I want to ignore will stay pretty much the same).

my @ignore = ("key1", "key2");

KEYS: foreach my $key (keys %a) {
	foreach my $ignore (@ignore) {
		next KEYS if $key eq $ignore;
	if ($a{$key} ne $b{$key}) {
		print "$key is different ($a{$key}, $b{$key})\n";

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