To remove trailing "^@", you could use the substitution operator: 
use strict;
use warnings;

while (my $str = <DATA>) {
    chomp $str;
    $str =~ s/\^\@$//;
    print "$str\n";
}

__DATA__
himanshu.txt^@
himanshu-prg.txt^@
hel_llo-workd.txt^@
foo

[download]

prints: 

himanshu.txt
himanshu-prg.txt
hel_llo-workd.txt
foo

[download]

In reply to Re: pattern matching by toolic
in thread pattern matching by himanshu.padmanabhi

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