Comparing contents of files

rrs · April 3, 2007, 6:12am

Hi,
I hav two files a1.txt and a2.txt,

a1.txt contains:
---------------
asdev ebcdev ....

a2.txt contains:
---------------
asdev ebcdev prod ....
a1.txt will be updated by a process,..
now i want to compare two files and i want to see data which is not in a1.txt

am i clear....??

regards
leenus

anbu23 · April 3, 2007, 6:14am

search the forum

cfajohnson · April 3, 2007, 6:02pm

Depending on what type of output you want, you could use com, diff or grep -f.

mukundranjan · April 3, 2007, 8:08pm

#!/usr/bin/perl

open(FILE, "<", "a1.txt" ) || die "Unable to open file a <$!>\n";
while ( <FILE> ) {
        chomp;
        $fileHash{$_} = $i++;
}
close(FILE);
open(FILE, "<", "a2.txt" ) || die "Unable to open file a <$!>\n";
while( <FILE> ) {
        chomp;
        if( exists $fileHash{$_} ) {
          }
        else {
                print "$_\n";
        }
}
close(FILE);
exit 0

Thanks,
Mukund Ranjan