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Re^2: Comparison by position and value

by BrowserUk (Pope)
on Jan 02, 2005 at 11:21 UTC ( #418773=note: print w/replies, xml ) Need Help??


in reply to Re: Comparison by position and value
in thread Comparison by position and value

That doesn't work as is?

#! perl -slw use strict; sub compatible { my ($s1, $s2) = @_; y/_/\0/c for $s1, $s2; !(($s1 | $s2)=~y/\0//); } printf "%s v %s ? %s\n", @$_, compatible( @$_ ) ? 1 : 0 for [ qw[ _8__3__19 48____7__ ] ], # good [ qw[ _8__3__19 4_8___7__ ] ], # bad [ qw[ _8__3__19 48_____7_ ] ]; # bad __END__ [11:18:29.65] P:\test>test _8__3__19 v 48____7__ ? 0 _8__3__19 v 4_8___7__ ? 1 _8__3__19 v 48_____7_ ? 0

Examine what is said, not who speaks.
Silence betokens consent.
Love the truth but pardon error.

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Re^3: Comparison by position and value
by ambrus (Abbot) on Jan 02, 2005 at 11:25 UTC

    I don't see your problem:

    _8__3__19 v 48____7__ ? 0 ^ _8__3__19 v 4_8___7__ ? 1 _8__3__19 v 48_____7_ ? 0 ^ ^

    For these strings at least, the result is 0 iff there is a clash of two digits somewhere.

      The first two strings are compatible, because they only overlap (contain a digit in the same place) where the digit is the same in both strings. Please see the 3 examples in the OP.


      Examine what is said, not who speaks.
      Silence betokens consent.
      Love the truth but pardon error.

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