Hi, I'm back again. Somehow, the word boundaries doesn't seem to work for some files, which some "0" remains as "0". I have tried 
 
            push(@output5b, $outputb);
           
           for (@output5b) { s/^0$/1/};

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But the zero does not change to 1 at all. I am not sure why is that so and whether there might have something that I missed out.

In reply to Re^2: Changing the numerical value from 0 to 1 by hellohello1
in thread Changing the numerical value from 0 to 1 by hellohello1

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