On Nov 26, 2006, at 12:18 AM, Roger Hui wrote:
Now that we have mastered zigzag order, how about the spiral order? For example, the spiral order for a 4 5 array is: 0 1 2 3 4 13 14 15 16 5 12 19 18 17 6 11 10 9 8 7
My At Play With J article "Volutes" in Vector 13.2 (October 1996) gives several solutions to the problem, but I doubt many people could improve Joey Tuttle's amazing one.
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