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regexp question

Posted on 2000-04-15
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Last Modified: 2010-05-18
Novice question here...
How can I open a file, entirely remove all lines which start w/ 'Path: ' (without the quotes), and write the file to a new filename. I have tried several variations on this code:

#!/usr/bin/perl

open NEWSFILE, "<news_file.txt" or die "Can't open news_file.txt";

open TEMPFILE, ">temp_file.txt" or die "Can't open temp_file.txt";
while (<NEWSFILE>) {
      tr/Path: //;
      print TEMPFILE;
}

close TEMPFILE;
close NEWSFILE;

but no luck.
thanks
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Question by:frenomulax
2 Comments
 
LVL 3

Accepted Solution

by:
jkstill earned 50 total points
ID: 2719875
simply change these 2 lines:

  tr/Path: //;
  print TEMPFILE;

to:

  print TEMPFILE if ! /Path:/;


That's all it takes.

The /Path:/ says print a line, unless 'Path:' is in the line.

If you want it to only check at the beginning of the line, change it to /^Path:/.

The 'tr' command you used says to translate the characters 'Path:' to nothing, which is exactly what happened, nothing. :)
0
 

Author Comment

by:frenomulax
ID: 2719964
Thanks, just what I wanted.
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