Hi Perl Monks, have a series of regexs that work great until I impose a series of OR conditions. I receive an error stating "use of uninitialized value for $url_sub at line 45." Excluding the OR series eliminates the error, so I'm not sure how the ORs create an error. Grateful for any ideas. Thanks! 


while (my $line = <$FH_IN>) { 
    chomp $line; #removes line break or new line;
    my $url_sub = "";           
           print "processing file $counter,\n";
# Within each record, loop until a match occurs with "subsid" in the r
+ecord,;
# and the record contains a URL address, and the URL contain a derivat
+ive; 
# of Exhibt 21, e.g., ex21, ex-21, exhibit21, or exhibt-21;           
+  
           while ($line =~ m/subsidiar/igm && $line =~ m/\/Archives(.*
+)">/igm &&
                 ($line =~ m/ex21/igm || $line =~ m/EX\-21/igm || 
                  $line =~ m/exhibit\-21/igm || $line =~ m/exhibit21/i
+gm)  ) {
                $url_sub = $1;    #extract the match and assign to var
+iable;      
                #Join the match with the standard URL prefix;     
                my $url = join("",$base_url,$url_sub);   
                print $url;
                open my $FH_OUT, '>>',$write_dir or die "Can't open fi
+le $write_dir >:$!>";              
                print $FH_OUT "$url\n"; 
                ++$counter;        
           }     #End of while loop for extracting matching text;
           
}    #End of record;

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In reply to Series of REGEX with OR by wrkrbeee

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