I think the (ahem!) key here is to convert your @keys array into a hash to make it easier to check for the existance of keys in your data line.

my @keys = ( qw|a e i o u| );
my %keys = map { $_ => 1 } @keys;
my @records = (
  '1|2|3|d|4',
  '1|2|3|a|4',
  '1|2|3|d|4',
  '1|2|3|o|4',
);

my @final;
my @result;

foreach (@records) {
  if ($keys{ (split /\|/)[3] }) {
    push @result, $_;
  }
}

print map { "$_\n" } @result;

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<http://dave.org.uk>

"The first rule of Perl club is you do not talk about Perl club." -- Chip Salzenberg

In reply to Re: Using map and grep to Sort one list using another list by davorg
in thread Using map and grep to Sort one list using another list by AntsPants

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