With regards to local variables in subs.
Can I create a local var in a sub without passing arguments to it.
I guess you can say local var=global var; so this is no reason to pass
arguments.
By the way, I see using local vars in subs to prevent changing a value of
a global var if your
the new varaible name is the same as the global. I tend to create new
variable names so to me
this local stuff is really a matter of convenience. You agree.
Dexter
-----Original Message-----
From: Albena Georgieva <[EMAIL PROTECTED]>
To: Dexter Coelho <[EMAIL PROTECTED]>; [EMAIL PROTECTED]
<[EMAIL PROTECTED]>
Date: Sunday, July 29, 2001 11:24 AM
Subject: Re: Question about subs and functions
>> What should cause me to have to pass variables to a subroutine through
>> arguments?
>
>One of the answers could be reusability and modularity. If you use
>arguments, you can call this subroutine whenever you like and from
different
>programs too and not be dependent on the main program to define global
vars.
>
>
>imagine, I need to open 100 files. So, I write a subroutine for openning a
>file:
>
>sub open_file {
>$file_name = $_[0];
>
>...
>}
>
>
>then I use one subroutine for openning 100 files, by prviding the file name
>as an argument.
>
>In your practise, I would have to write 100 subroutines, each of then
>referencing different global variable with the name of the file to be
>opened.
>
>sub open_file1 {
>$file_name = $my_global_var1;
>
>...
>}
>
>sub open_file2 {
>$file_name = $my_global_var2;
>
>...
>}
>
>Hope it helps,
>Albena
>
>
--
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
