From: Graham Foster <graham@...>
Date: 2004-09-23T07:34:41+09:00
Subject: Newbie: Case statement

As a newbie I'm confused about the Case construct. All the 
documentation I've found states "case operates by comparing the 
target with EACH of the expressions after the When keyword"
This does NOT appear to happen, as only the first match is ever 
actioned, so overlapping WHEN cases are skipped.
def test(x)
    case x
        when 1..2
            print "In A\n"
        when 1..3
            print "In B\n"
        when 2..4
            print "In C\n"
    end
end
test(2)
only outputs "In A"
I assume this is expected behaviour? (I'm ex-C - and was looking for 
fall-through behaviour)
So my underlying question is:- what's the fastest Ruby for checking 
which of the 8 possible adjacent cells on a board (2D array) are 
still "on the board"
Thx
Graham