From: -j b- <jrb562@...>
Date: 2008-07-08T00:28:28+09:00
Subject: Another logical precedence question

I am used to using the following shortcut:

value = ARGV.shift or usage

where usage is a method.
However, I recently ran into a situation where the following did not
work (as expected, anyway):

$user_type = ARGV.shift or usage
$user_map = ARGV.shift or DEFAULT_MAP

DEFAULT_MAP is just a string constant. When I tried to access $user_map
later I was surprised to find that it was nil when no argument was
provided. If I changed things to:

$user_type = ARGV.shift or usage
$user_map = (ARGV.shift or DEFAULT_MAP)

I got behavior I expected ($user_map was assigned DEFAULT_MAP).

Why the two types of behavior based (as far as I can tell) on the type
of the second parameter to 'or'?
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