On Mon, Oct 02, 2006 at 07:15:38AM -0700, Derek B. Smith wrote:
>
> For a complete understanding of scope (not listerine)
> : )
> please read the following:
> http://perl.plover.com/local.html#2_Localized_Filehandles
>
> and
> http://www.perlmonks.org/?node_id=564448
>
> Wow...opened my eyes and
-- "Charles K. Clarkson" <[EMAIL PROTECTED]> wrote:
> John Ackley wrote:
>
>
> : while( ($service) = $SERVICE->fetchrow_array ) {
>
> According to the DBI docs:
>
>"If there are no more rows or if an error occurs,
> then fetchrow_array returns an empty list."
>
> When a value
John Ackley wrote:
: while( ($service) = $SERVICE->fetchrow_array ) {
According to the DBI docs:
"If there are no more rows or if an error occurs,
then fetchrow_array returns an empty list."
When a value is returned, $service is set to that value.
When we get to the end of the l
[EMAIL PROTECTED] wrote:
...
My question is how to access $dbaccess variable (object) defined and
initialized in test.pm within test2.pm module?
If $dbaccess is delared with 'my' in test.pm, you cannot directly access
it from another file. You have two basic options:
1. Provide an accessor
I think the '$dbaccess' in your test.pm should be declared as perl's global var
as 'our $dbaccess;' or 'use vars qw($dbaccess);'. Then in your test2.pm,you
can access it as:
use vars qw($dbaccess);
print $test::dbaccess;
or:
use vars qw($dbaccess);
*dbaccess = \$test::dbaccess;
print $dbacces
tmatsumoto am Samstag, 13. August 2005 19.06:
> Hi,
>
> Thanks for the help. I've made the necessary changes. One error came up
> at runtime on the "use warnings;". I gather the module is not installed
> on the server I'm using.
Strange; the pragma module warnings.pm is AFAIK part of the core per
Hi,
Thanks for the help. I've made the necessary changes. One error came up
at runtime on the "use warnings;". I gather the module is not installed
on the server I'm using. I've gone through and made changes to the
script calling the package. I understand the syntax however the nothing
is
tmatsumoto am Samstag, 13. August 2005 11.13:
> Hi Beginners,
Hello,
> I a new Perl programmer dealing with issues of scope. I'm trying to
> write a simple library using strict. The script that runs the library
> is also strict. I can get the two to work without using strict, but I
> understand t
> -Original Message-
> From: West, William M [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, July 23, 2003 9:21 AM
> To: [EMAIL PROTECTED]
> Subject: scope of variable carrying 'for ($n1..$n2){}'
>
>
> for (1..19){
> for (1..19){
> print $_
> }}
>
> prints out the numbers 1 to 19 nin
On Jul 18, Nikola Janceski said:
>I was wondering what the scope of perlvars (ie. $! and $?) are across
>modules?
Those variables are true globals. They are seen everwhere.
>In module:
>open file || return -1;
>
>In script:
>Can I use $! here? and will it contain the reason open didn't open (i
At 12:47 PM 4/17/2002 -0700, you wrote:
>On Wednesday, April 10, 2002, at 04:42 , Elaine -HFB- Ashton wrote:
^
is this supposed to be funny?
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On Wednesday, April 10, 2002, at 04:42 , Elaine -HFB- Ashton wrote:
> I always found the local, my, our mess pretty confusing and the best
> explanation is MJD's "Coping with Scoping"
>
> http://perl.plover.com/FAQs/Namespaces.html
>
> Make good note of the text in red :)
ok, I get the followin
From: Ahmed Moustafa <[EMAIL PROTECTED]>
> Elaine -Hfb- Ashton wrote:
> > I always found the local, my, our mess pretty confusing and the best
> > explanation is MJD's "Coping with Scoping"
> >
> > http://perl.plover.com/FAQs/Namespaces.html
> >
> > Make good note of the text in red :)
>
> Elai
On Saturday, April 13, 2002, at 04:45 , Ahmed Moustafa wrote:
> Elaine -Hfb- Ashton wrote:
>> I always found the local, my, our mess pretty confusing and the best
>> explanation is MJD's "Coping with Scoping"
>> http://perl.plover.com/FAQs/Namespaces.html
>> Make good note of the text in red :)
Elaine -Hfb- Ashton wrote:
> I always found the local, my, our mess pretty confusing and the best
> explanation is MJD's "Coping with Scoping"
>
> http://perl.plover.com/FAQs/Namespaces.html
>
> Make good note of the text in red :)
Elaine, thanks a lot for MJD's article. There is a great differ
Timothy Johnson [[EMAIL PROTECTED]] quoth:
*>
*>Here's the part I still don't understand, and maybe some of you can show me
*>the light. What is the difference between local() and my()? I have never
*>used local(), the only examples I've ever been given involve scoping $_, and
*>if I am ever tem
> Here's the part I still don't understand, and maybe some of
> you can show me the light. What is the difference between
> local() and my()? I have never used local(), the only
> examples I've ever been given involve scoping $_, and if I am
> ever tempted to do that, I can usually trace it
On Tuesday, April 9, 2002, at 11:13 , Jenda Krynicky wrote:
[..]
> So if a module defines several classes it has to contain several
> packages.
>
> Jenda
yes I think I would modify that slightly
it is simpler to deliver one long file as a singular 'package'
that carries with
On Apr 9, Gary Hawkins said:
>> From: Jeff 'japhy' Pinyan [mailto:[EMAIL PROTECTED]]
>>
>> Perhaps you're missing the point.
>
>Gee, maybe that was the reason for the question. Ya think? Why do you
>hammer people for asking questions, that's what this place is for.
I wasn't. I was saying that
> -Original Message-
> From: Jeff 'japhy' Pinyan [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, April 09, 2002 11:58 AM
> To: Gary Hawkins
> Cc: [EMAIL PROTECTED]
> Subject: RE: Scope of variables. Lost in subs
>
> Perhaps you're missing the point.
On Apr 9, Gary Hawkins said:
>I was thinking there might be an instance where 'package bar' is
>essential, or the best way to go.
Perhaps you're missing the point. The package directive allows you to
change namespaces. Your Perl program operates in package 'main'. Most
modules operate in thei
From: "Gary Hawkins" <[EMAIL PROTECTED]>
> > > How many "things" can packages be? Is this foo a file?
> >
> > No this "foo" doesn't have to be a file. You can "have" several
> > packages in one file and "switch" between them.
> >
> > I don't know how to explain what ARE packages though.
> > Try
> > How many "things" can packages be? Is this foo a file?
>
> No this "foo" doesn't have to be a file. You can "have" several
> packages in one file and "switch" between them.
>
> I don't know how to explain what ARE packages though.
> Try if
> perldoc perlmod
> makes sense to you.
After
From: "Gary Hawkins" <[EMAIL PROTECTED]>
> > #!perl -w
> > my $x = 'Ahoj';
> > print "$x\n";
> > package foo;
> > print "$x\n";
> > __END__
> >
> > I believe packages are completely irrelevant to lexical (declared
> > with my()) variables.
> >
>
> I was following it up un
> > > If you declare a variable with my() its scope will be from the
> > > declaration to the end of the enclosing block. Which for variables
> > > declared outside any {} block or eval"" means ... to the end of the
> > > file.
> > >
> >
> > Wrong.
> >
> > You forgot about 'package'.
>
> What do y
Thanks to everyone who replied.
I got enough information to solve the problem, and then some more :)
Tor
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From: "Jonathan E. Paton" <[EMAIL PROTECTED]>
> Jonathan... nul point - my Eurovision song contest
> attempt would be less than that though. Yes, Jenda is
> right, and I'm wrong (again). Oh well, I do remember
> reading that.
A it feels so god to be right ;-)
And well ... I used to sin
--- Jenda Krynicky <[EMAIL PROTECTED]> wrote: > From: "Jonathan E. Paton"
<[EMAIL PROTECTED]>
> > > > It loses
> > > > scope in subroutines.
> > >
> > > Wrong.
> > >
> > > If you declare a variable with my() its scope will be from the
> > > declaration to the end of the enclosing block. Whic
Yep. I guess I'm still a little groggy. I think this whole "Spring
Forward" thing is a bit of a misnomer.
-Original Message-
From: drieux [mailto:[EMAIL PROTECTED]]
Sent: Monday, April 08, 2002 8:07 AM
To: [EMAIL PROTECTED]
Subject: Re: Scope of variables. Lost in su
Oops. My bad. I wonder how much extra work that one's cost me...
-Original Message-
From: Jenda Krynicky [mailto:[EMAIL PROTECTED]]
Sent: Monday, April 08, 2002 8:49 AM
To: Timothy Johnson
Cc: [EMAIL PROTECTED]
Subject: RE: Scope of variables. Lost in subs
From: "Timot
From: "Jonathan E. Paton" <[EMAIL PROTECTED]>
> > > It loses
> > > scope in subroutines.
> >
> > Wrong.
> >
> > If you declare a variable with my() its scope will be from the
> > declaration to the end of the enclosing block. Which for variables
> > declared outside any {} block or eval"" mea
> > It loses
> > scope in subroutines.
>
> Wrong.
>
> If you declare a variable with my() its scope will be from the
> declaration to the end of the enclosing block. Which for variables
> declared outside any {} block or eval"" means ... to the end of the
> file.
>
Wrong.
You forgot abo
From: "Timothy Johnson" <[EMAIL PROTECTED]>
> Another thing to remember is that declaring a variable with my() at
> the top of your script does NOT make the variable global.
Right.
> It loses
> scope in subroutines.
Wrong.
If you declare a variable with my() its scope will be from the
decl
On Monday, April 8, 2002, at 07:28 , Timothy Johnson wrote:
[..]
> If you just pass the value,
> then any operations performed on your variable in the subroutine will be
> destroyed when the sub exits. This way you will be performing all
> operations on the original variable, allowing you to cha
$var
PrintSub(\$var); #@_ now contains (\$var)
print "\$var is now $var.\n";
sub PrintSub{
my $subvar = ${$_[0]); #dereference the reference you passed.
print "\$subvar is now $subvar.\n";
}
-Original Message-
From: zentara
To: [EMAIL PROTECTED]
Sent: 4/8/02
On Mon, 08 Apr 2002 11:00:54 +0200, [EMAIL PROTECTED] (Tor Hildrum) wrote:
>On 8/4/02 9:15, "Tor Hildrum" <[EMAIL PROTECTED]> wrote:
>
>> Here are some of the error messages I get:
>> Use of uninitialized value in concatenation (.) at script.cgi line 55.
>> Use of uninitialized value in concatena
On 8/4/02 9:15, "Tor Hildrum" <[EMAIL PROTECTED]> wrote:
> Here are some of the error messages I get:
> Use of uninitialized value in concatenation (.) at script.cgi line 55.
> Use of uninitialized value in concatenation (.) at script.cgi line 55.
> Can't open : No such file or directory
Full so
Hello Bob,
> I think the answer can be found in the following statement in the persub
> manpage
> under the heading "Private Variables via (my)":
Yes, I read this (sorry for typing error, perlsub should be cited in my
initial message instead of perlvar). Unfortunately, the following
passage
Hello Jos,
"Jos I. Boumans" wrote:
>
> let's see if i can shed some light on this.
>
> your statement:
> print("Defined: <<$z>>\n") if defined(my $z="x");
>
> this will be evaluated like this if i'm not mistaken:
> ( print("Defined: <<$z>>\n") ) && defined(my $z="x");
>
> or a simplistic
> -Original Message-
> From: Ivan Adzhubei [mailto:[EMAIL PROTECTED]]
> Sent: Friday, August 10, 2001 7:24 AM
> To: [EMAIL PROTECTED]
> Subject: Scope, priority or bug?
>
>
> Hi!
>
> Isn't this weird?
>
> #!/usr/bin/perl -w
> print("Defined: <<$z>>\n") if defined(my $z="x");
> print "A
let's see if i can shed some light on this.
your statement:
print("Defined: <<$z>>\n") if defined(my $z="x");
this will be evaluated like this if i'm not mistaken:
( print("Defined: <<$z>>\n") ) && defined(my $z="x");
or a simplistic version:
(print $z) && (my $z = 'bar');
try and 'use strict'
> If I define a function just in the freespace of a file and have
included in
> that file two packages which are bracketed in like:
>
> sub function {}
>
> package 1;
> {}
>
> package 2;
> {}
>
>
>
> How do I access the function (make a function call) from within one of
the
> packages?
>
> is it m
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