From: Albert Ng <twinwing@...>
Date: 2007-03-12T04:24:36+09:00
Subject: directly modify a part on an array for quiz #117 purposes

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From Ruby quiz #117 (much fun)

#bad code by me, interesting bits shamelessly stolen from Dave Burt
neighborhood=[@grid[x0][y0], @grid[x0][y1], @grid[x1][y0], @grid[x1][y1]]

where each element of @grid[][] is a string, x1 = x0+1, and y1=y0+1

is there a way to do the following:
@grid[x0][y0], @grid[x0][y1], @grid[x1][y0], @grid[x1][y1] = @grid[x1][y0],
@grid[x0][y0], @grid[x1][y1], @grid[x0][y1]

in a more readable way

I thought

*neighborhood = @grid[x1][y0], @grid[x0][y0], @grid[x1][y1], @grid[x0][y1]

would be equivalent, but it isn't.

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