http://qs321.pair.com?node_id=282137


in reply to Re: Detecting transpositions
in thread Detecting transpositions

Hey! Thats really elegant and instructive Abigail-II - but please forgive a stupid question...
Would it be possible for the product of $f ^ $s to contain a "1" and hence pollute your $_ string?


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Re: Detecting transpositions
by Abigail-II (Bishop) on Aug 08, 2003 at 09:32 UTC
    Would it be possible for the product of $f ^ $s to contain a "1" and hence pollute your $_ string?

    Yes, but no. It could certainly be possible that the XORred string contains a character "1". But this is ok, the tr/\x00/1/c turns anything that is not "\x00" into a "1" anyway - after the tr, the string will only contain "\x00" and "1" characters.

    Abigail

      Oh of course they are. Looks like I'm being even more stupid than usual

      Sorry to have troubled you