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Postings from July 2000
On Sat, Apr 15, 2000 at 02:31:35PM -0400, Ilya Zakharevich wrote:
> On Sat, Apr 15, 2000 at 02:01:44PM -0400, Ronald J Kimball wrote:
> > > > Ex2:
> > > > @_ = map{
> > > > $_ += 1;
> > > > }(5,2,7,0,7,7);
> > > >
> > > > Exception: Modification of a read-only value attempted at 1.pl line 1
> > >
> > > Why are you surprised? Did you mean map {$_ + 1} ?
> >
> > He's surprised because this doesn't produce the same error:
> >
> > @_ = map {
> > $_ += 1;
> > } 1 .. 6;
>
> Oh, *this* bug:
>
> > perl -wle "sub a {map {print; ++$_} 1..3} a;print'';a"
> 1
> 2
> 3
>
> 2
> 3
> 4
>
> It was discussed here many years ago already. It is my long-held
> opinion that these values (produced at compile time) should be marked
> read-only.
$opinion = 'agreed';
$patches = 'welcome';
> Ilya
--
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# There is this special biologist word we use for 'stable'.
# It is 'dead'. -- Jack Cohen
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