This came up recently, so I know that:

1) strict doesn't complain. $rv is in a foreach loop, but it's not in a block (so it's file scoped).

2) I have no idea why, but after the loop, $rv will be set to the null string ("") and not 42 or undef. Therefore, the output will be a blank line.

my ... foreach ... is to be avoided.

Update: While I don't get any warnings under -w or use warnings, print(defined($rv)?1:0, "\n"); prints 0, indicating $rv is undefined. ActivePerl v5.6.1

In reply to Re: my Scope Pop Quiz by ikegami
in thread my Scope Pop Quiz by saintmike

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