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Re^2: Problem with String replace in file

by philosophia (Sexton)
on Oct 22, 2007 at 17:31 UTC ( [id://646508]=note: print w/replies, xml ) Need Help??


in reply to Re: Problem with String replace in file
in thread Problem with String replace in file

if I use

s/\|\|/|\\N|/g;

it replaces || with ||. The \N seems to be an invisible newline character, and I want it to just be '\N'.
  • Comment on Re^2: Problem with String replace in file

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Re^3: Problem with String replace in file
by meraxes (Friar) on Oct 22, 2007 at 17:36 UTC

    I suspect your problem is that you are writing back to the filehandle IN when you (presumably) only opened it for read.

    open( IN, '<', $filename ); # input
open( OUT, '>', 'newfilename.txt' ); # output
while ( <IN> ) {
    s/\|\|/|\\N|/g;
    print OUT;
}
close IN;
close OUT;

    [download]
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    meraxes
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      This was correct, thank you. || is replaced by |\N| throughtout newfilename.txt.
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Re^3: Problem with String replace in file
by ikegami (Patriarch) on Oct 22, 2007 at 17:40 UTC

    \n will result in a newline.
    \N will result in a syntax error.
    \\N will give \N.

    If you're not getting \N from \\N, there's something you haven't showed us.

    Update: meraxes caught the problem.

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