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Re: Sudoku - A solution in XSLT 2

Subject: Re: Sudoku - A solution in XSLT 2
From: andrew welch <andrew.j.welch@xxxxxxxxx>
Date: Thu, 16 Feb 2006 14:49:10 +0000
xslt idiv
> not sure if the table is better than just working out the group number
> $groups[$x]
> is
> 1+  3* (($x - 1) idiv 27) + ((($x -1) idiv 3 )mod 3)
>
> groups[$x] probably takes time proportional to $x (unless Saxon does
> something clever there) but the expression is presumably more or less
> constant time if you stay within machine integer range, but since the
> board is only 81 entries rather than thousands of entries, the limiting
> behaviour isn't really relevant and it's just a matter of trying it out
> in the particular implementation I suppose.

After moving to your table idea processing time did increase slightly
(unscientific timing)

I'll try the alternative you've suggested - if it works I'll attempt
to understand it as well :)

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