Re: Getting a / when regex should produce nothing

Torsten Förtsch schrieb am 27.04.2010 um 11:25:33 (+0200):

> On Tuesday 27 April 2010 10:18:17 Michael Ludwig wrote:
> 
> > A lexical variable in Perl is any variable declared with "my",
> > regardless of the scope, which may be file-level. Unlike globals,
> > lexical variables aren't directly accessible from outside the
> > package.
> 
> Not quite correct. Consider this:
> 
> $ perl -Mstrict -le '
>   my $x=10;
>   our $y=20;
>   {
>     package hugo;
> 
>     print "x=$x";   # references $x outside of package hugo
>     print "y=$y";   # references $main::y

Thanks for catching this. Indeed, lexical variables aren't described
in terms of packages, but in terms of lexical scope.

> $x is file-level lexical. It is visible all over the file. The
> embedded package hugo has no influence. Lexical variables are not
> bound to a package but to a lexical scope.
> 
> Same with our-variables. C<our> declares the visibility of a variable
> in the current lexical scope.

Variables declared with "our" are a funny hybrid between global
variables, which are attached to a package, and lexical variables,
which are attached to a scope.

-- 
Michael Ludwig