in reply to Reading nth line from a file

Here is another simple way. 
my @arrvar = <FH>;
map {
        if ($arrvar[$_] =~ /you have to read the fourth line/) {
                print "$arrvar[$_+4]";
        } elsif ($arrvar[$_] =~ /you have to read the second line/) {
                print "$arrvar[$_+2]";
        }
    }0..$#arrvar;

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Re^2: Reading nth line from a file
by perlthirst (Scribe) on Dec 19, 2008 at 06:44 UTC

    Thanks for your reply.

    But reading the whole file into an array may not be efficient. If the file size is too large, it will take so much memory i think.

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