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Re^3: grabbing certain lines

by adrianh (Chancellor)
on Nov 12, 2002 at 09:45 UTC ( #212233=note: print w/replies, xml ) Need Help??

in reply to Re: Re: grabbing certain lines
in thread grabbing certain lines

I belive you'll find that still reads the entire file in before running the grep - so filtering the file first doesn't really give you anything.

If the size of the file is an issue you'll want to use a loop to go over it line by line. Something like this should do it:

my %name2email; while (<DATA>) { next unless m/^(?:To|From|Reply-To): (\S+)\s+<?([^\s>]+)/; $name2email{$1} = $2; };

Note: the regex doesn't cope with a fair bit (multiple addresses, addresses without names, etc.).

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