On 7/20/07, Mr. Shawn H. Corey <[EMAIL PROTECTED]> wrote:
Chas Owens wrote:
> The problem is that "my $c = 5" creates a lexical inside the while
> loop created by -p and it goes out of scope immediately.
Yes, that's what 'my' means. If you do it without the 'my', it works.
And it has a lot of security problems. But it's also quick and easy to
remember. Like any tool, it cannot be used to solve all your problems.
Yes, but that is not what a good REPL should do with it. Take a look
at the pugs example again. The problem is that you are executing my
code in your context. My code should be evaluated in a separate
context. There should be no difference between
perl -e '
my $n = 5;
$n++;
print "$n\n";
'
and
mythical_perl_repl
my $n = 5
5
$n++
5
print "$n\n"
6
1
(note: 1 is what print would return).
In fact, here is an example using pugs:
[EMAIL PROTECTED]:~$ cat t.p6
my $c = 5;
$c++;
say $c;
[EMAIL PROTECTED]:~$ pugs t.p6
6
[EMAIL PROTECTED]:~$ pugs
______
/\ __ \
\ \ \/\ \ __ __ ______ ______ (P)erl6
\ \ __//\ \/\ \/\ __ \/\ ___\ (U)ser's
\ \ \/ \ \ \_\ \ \ \/\ \ \___ \ (G)olfing
\ \__\ \ \____/\ \____ \/\_____\ (S)ystem
\/__/ \/___/ \/___/\ \/____/
/\____/ Version: 6.2.13
\/___/ Copyright 2005-2006, The Pugs Contributors
--------------------------------------------------------------------
Web: http://pugscode.org/ Email: [EMAIL PROTECTED]
Welcome to Pugs -- Perl6 User's Golfing System
Type :h for help.
Loading Prelude... done.
pugs> my $c = 5
5
pugs> $c++
5
pugs> say $c
6
Bool::True
pugs>
--
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
http://learn.perl.org/
