Re: How do I properly use global variables?

Jeff Pang wrote: > On 10/23/07, monk <[EMAIL PROTECTED]> wrote: > >> I'm having problems accessing a variable outside its subroutine. >> I've tried several combinations too long to write here. Maybe I just >> can't see the forest for the trees. But I'm lost. I need your >> wisdom. >> >> I'd li

Re: How do I properly use global variables?

On 10/23/07, monk <[EMAIL PROTECTED]> wrote: > I'm having problems accessing a variable outside its subroutine. > I've tried several combinations too long to write here. Maybe I just > can't see the forest for the trees. But I'm lost. I need your > wisdom. > > I'd like my program below to change

Re: How do I properly use global variables?

You might want to try the following call your script twice with the start argument, then look at the processes running (just send the output of the script to /dev/null or something like that for ease of use) You will see the script running twice, this is because you started the Perl interpreter t

How do I properly use global variables?

I'm having problems accessing a variable outside its subroutine. I've tried several combinations too long to write here. Maybe I just can't see the forest for the trees. But I'm lost. I need your wisdom. I'd like my program below to change $status to zero to exit the loop. meaning...$> perl tes

Re: global variables

David Gama Rodrí­guez wrote: Tom Phoenix wrote: On 1/10/06, David Gama Rodrí­guez <[EMAIL PROTECTED]> wrote: I made a module that loads when Apache starts, in my module I declare a hash as a global in order to be accesed in any place in my module, my $hash; Not to be picky about t

Re: global variables

On 1/10/06, David Gama Rodrí­guez <[EMAIL PROTECTED]> wrote: > I made a module that loads when Apache starts, in my module I declare a > hash as a global in order to be accesed in any place in my module, > > my $hash; Not to be picky about terminology, but a "my" variable is a lexical variable, n

Re: global variables

I think that a fresh new copy of the module is loaded into memory everytime it is called. That's why your module loses its value. If I want to do something like that, I'd consider storing the value on the hard drive somewhere. Vishal Quoting David Gama Rodrí­guez <[EMAIL PROTECTED]>: > Hello ev

global variables

Hello everyone !! I'm really a newbie developing perl modules. I have and issue I made a module that loads when Apache starts, in my module I declare a hash as a global in order to be accesed in any place in my module, my $hash; sub x{ $foo = shift; .. .. $hash->{x} = $foo; } sub

Local and global variables

Can someone explain the difference between use vars qw/$defined_by_vars/ ; our $defined_by_our ; $not_explicily_defined = 1 ; Are these all global to the package they are defined it. -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]

Re: Global variables / special variables / variable identifier with just one character

"Adam" <[EMAIL PROTECTED]> 在郵件 news:[EMAIL PROTECTED] 中撰寫... > Expected error message: "Global symbol "$b" requires explicit package name". > However, I get result: "test". > I've checked the special variables and it looks like $b is one of these. > > use warnings; > use strict; > zzz ($b); > prin

Re: Global variables / special variables / variable identifier with just one character

> Expected error message: "Global symbol "$b" requires explicit package > name". > However, I get result: "test". > I've checked the special variables and it looks like $b is one of > these. > > use warnings; > use strict; > zzz ($b); > print "$b\n"; > sub zzz{ > $_[0] = "test"; > } > > Does it

Global variables / special variables / variable identifier with just one character

Expected error message: "Global symbol "$b" requires explicit package name". However, I get result: "test". I've checked the special variables and it looks like $b is one of these. use warnings; use strict; zzz ($b); print "$b\n"; sub zzz{ $_[0] = "test"; } Does it mean - that in general - we

Re: use strict, global variables, modules

Emil Perhinschi wrote: > > Hi! Hello, > I'm writing a rather complicated script, reading bibtex (my code) and > xml (XML::Grove) files etc. > > I have to "use strict" and "my $variable" in order to keep references in > check, as there are lo

use strict, global variables, modules

Hi! I'm writing a rather complicated script, reading bibtex (my code) and xml (XML::Grove) files etc. I have to "use strict" and "my $variable" in order to keep references in check, as there are lots of them. I want to define some "global" variables in the

Re: Global variables and a forked process

Yesterday, Wiggins d'Anconia wrote: > Yes and no. There are multiple different implementations of threads all > of which have some good and bad points. You will need to look more into > them depending on your version of Perl and how complex the task is that > you wish to accomplish. (There is also

Re: Global variables and a forked process

On Mon, 11 Aug 2003 08:11:07 -0500 (CDT), Paul Archer <[EMAIL PROTECTED]> wrote: > Yesterday, Wiggins d'Anconia wrote: > > > Yes and no. There are multiple different implementations of threads all > > of which have some good and bad points. You wi

Global variables and a forked process

Does a forked process share the memory locations of the global variables from the parent process? Thanks in advance! -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]

Re: Global variables and a forked process

Steve Grazzini wrote: On Sat, Aug 09, 2003 at 01:04:26PM -0700, Ahmed Moustafa wrote: Does a forked process share the memory locations of the global variables from the parent process? Changes made after the fork() won't be visible in the other process, if that's what you're

Re: Global variables and a forked process

On Sat, Aug 09, 2003 at 01:04:26PM -0700, Ahmed Moustafa wrote: > Does a forked process share the memory locations of the global > variables from the parent process? Changes made after the fork() won't be visible in the other process, if that's what you're wonderin

Re: Global variables and a forked process

. So, is there a way to assign values to the global variables in the parent process? No. You'd need to switch to threads or keep the fork and use some kind of IPC. % perldoc perlipc Are there threads in Perl? Yes and no. There are multiple different implementations of threads all of whi

Re: Global variables and a forked process

assign values to the global variables in the parent process? No. You'd need to switch to threads or keep the fork and use some kind of IPC. % perldoc perlipc Are there threads in Perl? What is your application doing? It scans FTP home directories, once it finds a file, it validates

Re: Global variables and a forked process

On Sat, Aug 09, 2003 at 05:14:34PM -0700, Ahmed Moustafa wrote: > Steve Grazzini wrote: >> Changes made after the fork() won't be visible in the other >> process, if that's what you're wondering. > > Yes, that's exactly what I am wondering. So, is the

RE: HOWTO:Dynamically getting all of the global variables and their v alues

Ken Lehman <[EMAIL PROTECTED]> wrote: : : I would like to write a function that will get : all the global variables that are declared in : my script plus their values( which will all : be strings if that matters). This is what I : have so far: : : my ( $varName, $globValue ); : :

RE: HOWTO:Dynamically getting all of the global variables and their v alues

Ken Lehman wrote: > I would like to write a function that will get all the global > variables that are declared in my script plus their values( which > will all be strings if that matters). This is what I have so far: > Why use global variables when you could use a hash which

HOWTO:Dynamically getting all of the global variables and their v alues

I would like to write a function that will get all the global variables that are declared in my script plus their values( which will all be strings if that matters). This is what I have so far: my ( $varName, $globValue ); while ( ($varName, $globValue) = each %main:: ) { print "\$$va

Re: How bad is it to use global variables?

Nils-Anders Persson wrote: > Hello, > > I've seen many discussions regarding the use of "use strict". > > What i wonder is why is it so bad using global variables? > It's not. It's bad to use global variables /all the time/, even if you don't nee

RE: How bad is it to use global variables?

On Thu, 23 Jan 2003 08:52:01 -0500, "Kipp, James" <[EMAIL PROTECTED]> wrote: there is a article called > "coping with scoping" you might want to read. I don't have the URl handy, > but a google search will find it. > I keep it handy: http://per

RE: How bad is it to use global variables?

Just 'use' it. :-) > > What i wonder is why is it so bad using global variables? > Memory usage, modularity, debugging, are three good reasons. > And another question how do you define constants in perl? > use constant CONSTANT_NAME => 5; perldoc constant (f

RE: How bad is it to use global variables?

> > I've seen many discussions regarding the use of "use strict". > > What i wonder is why is it so bad using global variables? > > And another question how do you define constants in perl? > use strict does not disallow global variables, it simply enforc

How bad is it to use global variables?

Hello, I've seen many discussions regarding the use of "use strict". What i wonder is why is it so bad using global variables? And another question how do you define constants in perl? regards, Nils-Anders -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands,

Re: Global variables

uot; <[EMAIL PROTECTED]> Sent: Wednesday, August 21, 2002 6:34 AM Subject: Global variables > What would be the preferred method of creating global variables that can be > used in several different cgi scripts. For example, I'd like to create the > variables $database, $use

Re: Global variables

#-- prints db print $DBString::user,"\n"; #-- prints user print $DBString::psw,"\n"; #- -prints psw for more info, check out perldoc david Dan Fish wrote: > What would be the preferred method of creating global variables that can > be > used in several different cgi scrip

Global variables

What would be the preferred method of creating global variables that can be used in several different cgi scripts. For example, I'd like to create the variables $database, $user, $pass that I only have to change in one place, but can use in many different scripts. In C of course I'

Re: Global variables in forked processes

On Friday, May 10, 2002, at 09:20 , Chas Owens wrote: [..] > In many operating systems fork is implemented using copy-on-write. This > means that when you fork both processes refer to the same memory > locations until one of them tries to change the bytes stored there. At > that time the change

Re: Global variables in forked processes

On Fri, 2002-05-10 at 00:12, Ahmed Moustafa wrote: > Thanks a lot. I understand that. > > I was thinking that variable 'x' of a forked process 'p2' would point at > the same memory location of variable 'x' of a parent process 'p1'. That > can't be true. If that was true, 'p1' and 'p2' would be

Re: Global variables in forked processes

Thanks a lot. I understand that. I was thinking that variable 'x' of a forked process 'p2' would point at the same memory location of variable 'x' of a parent process 'p1'. That can't be true. If that was true, 'p1' and 'p2' would be identitcal (no need to fork!). -- Ahmed Moustafa http://po

Re: Global Variables: 'my' vs 'use vars'

On Thu, 2002-03-28 at 14:55, [EMAIL PROTECTED] wrote: > Hello, All: > > I've never been very good at scoping so it it's no surprise that this > confuses me: > > When declaring variables at the beginning of a script, what is the > difference between 'my' and 'use vars'? > > -- > Eric P. >

Global Variables: 'my' vs 'use vars'

Hello, All: I've never been very good at scoping so it it's no surprise that this confuses me: When declaring variables at the beginning of a script, what is the difference between 'my' and 'use vars'? -- Eric P. Los Gatos, CA -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additiona

Re: [Q]Setting global variables.

> Perl Gurus, > > How can I set global variables in perl.? I'm trying > to do something like.. The logic is broken, I believe this is more appropriate: my $myvar = param("myvar"); unless ($myvar) { # Show form } else { # Pro

[Q]Setting global variables.

Perl Gurus, How can I set global variables in perl.? I'm trying to do something like.. if(param()) { my $myvar=param("myvar"); if(param("myvar2"){ use $myvar here.. Has some script to show a form.. } else { On submitting the form, user enters here.. someother use of

Re: Defining Global Variables w/use strict;

On Nov 8, Arul, Rex said: >Import is redundant because, whenever you say, "use Defaults" it is akin >to a directive. Yes, use Module; becomes BEGIN { require Module; Module->import; } but we weren't use()ing the file. The bigger problem is that I called the import method from

[Fwd: Re: Defining Global Variables w/use strict;]

Jeff , Import is redundant because, whenever you say, "use Defaults" it is akin to a directive. So what it does implicitly is to invoke the "import" method of the module named "Defaults" . So when you say, "use strict;" or "use warnings;" , implicitly the "import" method of those modules are

Re: Defining Global Variables w/use strict;

On Nov 8, Peter Scott said: >> use DBI; >> use strict; >> require "defs.pl"; >> >> print "Welcome to $DOMAIN, $ADMIN\n"; > >Global symbol $DOMAIN requires explicit package name... Oops, that require() should have been inside a BEGIN { } block. >> package Defaults; >> require Exporte

Re: Defining Global Variables w/use strict;

At 11:06 AM 11/8/01 -0500, Jeff 'japhy' Pinyan wrote: >On Nov 8, Tomasi, Chuck said: > > >I have a series of related programs that need global definitions ($DOMAIN, > >$ADMIN, $DBNAME, etc). My code looks something like this: > >Global variables aren't

Global Variables and use strict;

ould be cumbersome if the variable list gets long, and could cause conflicts between exported package variables (globals) and locals of the same name. --or-- Reference the package (global) variables as $pkgname::variable, typing a little more, but avoiding abmiguity. I've used these from oth

Re: Defining Global Variables w/use strict;

On Nov 8, Tomasi, Chuck said: >I have a series of related programs that need global definitions ($DOMAIN, >$ADMIN, $DBNAME, etc). My code looks something like this: Global variables aren't declared with my(). It sounds like you want to use the Exporter module. Your base program

RE: Defining Global Variables w/use strict;

als I should have learned years ago. Thanks. > -Original Message- > From: dan radom [mailto:[EMAIL PROTECTED]] > Sent: Thursday, November 08, 2001 9:50 AM > To: '[EMAIL PROTECTED]' > Subject: Re: Defining Global Variables w/use strict; > > > just a thou

Re: Defining Global Variables w/use strict;

ovember 08, 2001 4:45 PM Subject: Defining Global Variables w/use strict; > System: Sun Ultra 2, Solaris 7 (11/99) > Perl: 5.6.0 > > I have a series of related programs that need global definitions ($DOMAIN, > $ADMIN, $DBNAME, etc). My code looks something like this: > >

Re: Defining Global Variables w/use strict;

He want's to take then in his global variables list.. where $DOMAIN is plexus.com and ADMIN is Chuck Etienne dan radom wrote: > > just a thought, but how can you print a variable that hasn't been defined yet? > > dan > > * Tomasi, Chuck ([EMAIL PROTECTED]) wr

Re: Defining Global Variables w/use strict;

> -- > #!/usr/local/bin/perl -w > > use strict; > use DBI; > > require "defs.pl"; > > print "Welcome to $DOMAIN, $ADMIN\n"; > -- #!/usr/local/bin/perl -w use strict; use DBI; use defs; print "Welcome to defs::$DOMAIN, defs::$ADMIN\n"; --

Re: Defining Global Variables w/use strict;

just a thought, but how can you print a variable that hasn't been defined yet? dan * Tomasi, Chuck ([EMAIL PROTECTED]) wrote: > System: Sun Ultra 2, Solaris 7 (11/99) > Perl: 5.6.0 > > I have a series of related programs that need global definitions ($DOMAIN, > $ADMIN, $DBNAME, etc). My code l

Defining Global Variables w/use strict;

System: Sun Ultra 2, Solaris 7 (11/99) Perl: 5.6.0 I have a series of related programs that need global definitions ($DOMAIN, $ADMIN, $DBNAME, etc). My code looks something like this: -- #!/usr/local/bin/perl -w use strict; use DBI; require "defs.pl"; print "Welcome t

Re: using global variables in other files

Transform your pl file in a package and then use use to get variables, or qualify the full name : $modname:varname. define this variables global in modul or export the vars . take a look on Exporter Modul hope it helps martin ÷ÁÓÉÌØÞÅÎËÏ îÁÔÁÌØÑ áÎÁÔÏÌØÅ×ÎÁ wrote: > Hello, all! > > I have som

using global variables in other files

Hello, all! I have some variables defined in file $user_ip = $ENV{'REMOTE_ADDR'}; $user_name = $ENV{'AUTH_USER'}; . Now I want to use these values in other files. unless ($user_ip =~ /^10\./)... # #etc. What should I do? use 'require userinfo.pl;' or use 'package' or some

'global' variables

Hi all, I stuff all subroutines for my current perl experiment in a separate file, which i 'require' when needed. I would like to set a number of global variables in this file, which would then be imported together with the subroutines. How would I go about doing this? -- martij

Re: global variables

In article <001201c144fb$4a1ba3d0$ec00a8c0@boxx>, [EMAIL PROTECTED] (Sascha Kersken) wrote: > Perl 5.6 provides the 'our' statement as opposite to 'my': it makes a > variable global to a file in which it's used. it declares a package variable, actually. if you aren't in its package, then you h

Re: global variables

In article <[EMAIL PROTECTED]>, [EMAIL PROTECTED] (Ruth Albocher) wrote: > I would like to use a global variable in my perl application, but since > everything in perl is in a package, it will always belong to some > package. what can I do? stay away from global variables. :

Re: global variables

Hi! Perl 5.6 provides the 'our' statement as opposite to 'my': it makes a variable global to a file in which it's used. HTH Sascha - Original Message - From: "Ruth Albocher" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, Septe

global variables

Hi. I would like to use a global variable in my perl application, but since everything in perl is in a package, it will always belong to some package. what can I do? thanks, ruthie -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]

Re: global variables in subroutines..?

{ my (@failedFields); > my ($validForm)="1"; > > #validate job selection > if (!$job) { > $job="job "; > push (@failedFields, $job); > > } > > my question is, I remember someone a while bac

global variables in subroutines..?

e job selection if (!$job) { $job="job "; push (@failedFields, $job); } my question is, I remember someone a while back mentioning that you should NOT redefine global variables in your subroutines... what can I do as

Re: Inheritance of package global variables

On Fri, Jun 29, 2001 at 12:14:23AM -0400, Richard J. Barbalace wrote: > I don't really want to export the variables; I'm not modifying them in > the parent package, just copying and expanding them in the inheriting > package. Well then, you are copying and modifying as simply as it can be done.

Re: Inheritance of package global variables

> [inherited attributes] > [get/set accessor methods] > [regex validation of set] > [better way?] I'm not sure about there being a *better* way, but I'm sure there are a lot of *other* ways. Various thoughts... Perl has the concept of tied data items. The basic operations on those data items, l

Re: Inheritance of package global variables

Michael Fowler <[EMAIL PROTECTED]> replies: > Exporting is usually a bad idea when dealing with classes, it breaks > encapsulation. You should probably setup a class method for this. > > That being said, you can export variables just like you export any other > data type, with Exporter; perldoc

Re: Inheritance of package global variables

MyPackage is > rather verbose, and I'm wondering if there is a better or terser way > of doing that. What's the recommended way of inheriting package > global variables? Exporting is usually a bad idea when dealing with classes, it breaks encapsulation. You should probably setu

Inheritance of package global variables

Hi. I feel like I'm asking a lot of questions lately, but this list has been extremely helpful. :) I'm writing some packages that inherit from a base class, which has some fields and some global variables that I want inherited. I have code like: # La/De/Da/MyBase.pm pack

Re: Global Variables Question

ire config.pl; > > use vars ($G_ROOTPATH); > # at this point, G_ROOTPATH is inherited from config.pl and has the > value of > /home/warren > > <<<<<<< > On the first run of the script G_ROOTPATH in test.pl has the value of > home/warren... subsequent runs,