my @arr = (12341,1245125,1525125,125125125);
my $str; # should be: "job==12341 || job==1245125 || job==1525125 || job==125125125"
my $flag = 1;
my $counter = 0;
foreach my $num (@arr) {
    $flag = 0 if($counter == scalar(@arr) - 1);
    $str .= "\"" if($counter == 0);
    $str .= "job==".$num;
    $str .= " || " if($flag);
    $str .= "\"" if($counter == scalar(@arr) - 1);
    $counter++;
}
print $str."\n";