-----Original Message-----
From: Adriano Allora [mailto:[EMAIL PROTECTED]
Sent: Wednesday, August 16, 2006 1:21 PM
To: beginners@perl.org
Subject: match an array element
hi all,
I need to match any array element in a list of files. More precisely
I'd to extract the $. for each match recording an hash element like
this one:
$matches{$filename} = $.
Every file is a list of unique words, so I'm sure there will not be
problems.
My actual solution sounds like:
foreach $file (@listoffiles)
{
open (IDX, "<$file") or die "error on $file: $!\n";
while(<IDX>)
{
foreach $word (@listofwords)
{
$match{$file}= $. if /^$word$/;
}
print "done $file\n" if eof;
}
close(IDX);
}
Two questions:
1) is there a way to avoid a foreach in a foreach?
2) the (possible) other solution is faster than a foreach in a foreach
or it's only a different way to write it?
************************************************************************
****
1) I would think not if each array contains unique elements then two
foreach is necessary.
So you for each element in @listoffiles you will open the FH IDX? This
seems redundant and wasteful to me. I would open prior to the 1st
foreach and close it at the end when you are done.
2) the map function is an equivalent to the foreach.
perldoc -f map
3) at the top of your program
use strict;
use warnings;
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