GauCho has asked for the wisdom of the Perl Monks concerning the following question:

Hi All, i have a problem with using sed in a perl script. Requirement: Read a csv file (file1) containing certain pattern, match the pattern in another text file (file2) and delete it where ever its occurring.


abc/def sde/dfg/htf


abc/def = 100 sde/dfg/htf = 230 dad/fry = 000

in the end only dad/fry = 000 should remain in file2.

I cannot install any package, so have to use the default perl options.

Since my file1 contains special character "/" , i have escaped it in my code.

my sed command is working fine if I try to run it without loop, i.e for one pattern only. As soon as I add it in loop, it fails.

my code:

my $var = "sde\\/dfg\\/htf"; `sed -i '/$var/d' ADT_DVEBMGS33_ldciadt`;

The above works fine.

i tried to encorporate in a loop

my $len = scalar @delete; for ( my $i = 0; $i <=$len; $i++){ my $first = $delete[$i]; chomp $first; $first =~ s:/:\\\\/:g; `sed -i "/$first/d" file2`; }


<c> sed: -e expression #1, char 10: extra characters after command sed: -e expression #1, char 0: no previous regular expression