Also note that looping over a lexical variable declaration does not 're-declare' that variable. It just gets marked as uninitialized.
I was reading the Monk tutorial "Coping with Scoping", and I found an example which is relevant to this discussion:
Every time control reaches a my declaration, Perl creates a new, fresh variable. For example, this code prints x=1 fifty times:
for (1 .. 50) {
my $x;
$x++;
print "x=$x\n";
}
You get a new $x, initialized to undef, every time through the loop.
If the declaration were outside the loop, control would only pass by it once, so there would only be one variable:
{ my $x;
for (1 .. 50) {
$x++;
print "x=$x\n";
}
}
This prints x=1, x=2, x=3, ... x=50.
That seems at odds with what you are saying. In any case, there are situations where declaring a my variable inside a loop can cause problems.
