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Re: Question about reading specific line in a text file

by nagalenoj (Friar)
on Apr 04, 2009 at 06:22 UTC ( #755405=note: print w/ replies, xml ) Need Help??


in reply to Question about reading specific line in a text file

Try this..,

open (DATAFILE3, $prog); @lines = <DATAFILE3>; close(DATAFILE3); $lines[76] =~ s/^(\S+\s+\S+).*/$1/; print "$lines[76]><br>\n"

Also, it is not a good practice to read the entire file in a single attempt. Think, what happens if the file is huge in size?

Try something like this to avoid reading the file like the above

open (DATAFILE3, $prog); while (<DATAFILE3>) { next if 1 .. 75; # flip-flop operator $line = $_; last; } # $line has the 76th line, do your stuff now. close(DATAFILE3);


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Re^2: Question about reading specific line in a text file
by naikonta (Curate) on Apr 04, 2009 at 07:03 UTC
    Actually, you only need one control statement if you know exactly the line number you want to process, by using $. aka $INPUT_LINE_NUMBER in English.
    while (<DATAFILE3>) { $line = $_, last if $. == 76; }

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