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Postings from November 1999
On Mon, Nov 15, 1999 at 07:01:44PM -0800, Tom Phoenix wrote:
> On Sun, 14 Nov 1999, Andrew Pimlott wrote:
>
> > A coworker accidentally did:
> >
> > {
> > local($/ = undef);
> > ...
> > }
> >
> > This did not localize $/ . I don't know what it did do.
>
> It looks to me as if it did localize $/ -- but only _after_ storing undef
> into it. Oops!
>
That was my guess, too, but further tests don't seem to be consistent with
that conclusion:
#!perl -w
$x = 'a';
print "1: $x\n";
{
local($x = undef);
print "2: $x\n";
$x = 'b';
print "3: $x\n";
}
print "4: $x\n";
---
1: a
Use of uninitialized value at foo line 9.
2:
3: b
4: b
--
If $x were being localized at all, then 4 would be 'a', rather than 'b'.
Ronald
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