in reply to Delete specific lines from txt file.

FredFredFred:

What part are you having trouble with? If it's actually removing the data from the file, then a typical method to do it is to write the data you want to keep to a new file. Then rename your data file to a backup version, and rename your new file with the original name.

You're welcome, and good luck.

...roboticus

When your only tool is a hammer, all problems look like your thumb.

  • Comment on Re: Delete specific lines from txt file.

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Re^2: Delete specific lines from txt file.
by FredFredFred (Initiate) on Aug 07, 2012 at 23:15 UTC

    hmm, that sounds good, but I have no clue how to do it... Can you provide some code? Thanks

[reply]

      FredFredFred:

      # Discard every other line
open FIN, 'INFILE' or die;
open FOUT, '>INFILE.new' or die;
my $cnt;
while (<FIN>) {
   next if $cnt%2;
   print FOUT;
}
close FH;
close FOUT;
rename 'INFILE', 'INFILE.bak';
rename 'INFILE.new', 'INFILE;

      [download]

      ...roboticus

      When your only tool is a hammer, all problems look like your thumb.

[reply]
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