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How do I delete/modify one line from test file ?

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Contributed by Anonymous Monk on Jun 22, 2000 at 18:02 UTC
Q&A  > files


Description:

I have data file:

a|a|a|a|a|a
b|b|b|b|b|b
c|c|c|c|c|c

I want remove b|b|b|b|b|b line. How can I do that ?

Answer: How do I delete/modify one line from test file ?
contributed by devslashneil

Another way of removing the line would be:

#!/usr/bin/perl use Tie::File; my $filename = 'foo.dat'; tie @array, 'Tie::File', $filename or die "Cannot open $filename\n"; splice @array,1,1

Answer: How do I delete/modify one line from test file ?
contributed by marcos

perl -ni.bak -e 'print unless /(b\|)*b/' filename
This line edit in place (-n option) filename removing any line like b|b|b|b, and save the original filename as filename.bak (-i.bak option).
I'm not sure this is what you need, but I hope it helps
marcos
Answer: How do I delete/modify one line from test file ?
contributed by draco_iii

open(FILEHANDLE,"+< $FILENAME) or die print $!; while(<FILEHANDLE>){ if ($_ ne 'b|b|b|b|b|b'){ push(@outtext,$_); } Do what you want from here. Of course it always a good idea to lock the file if you are on a UNIX system.

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