PERL Beginners - General questions

Author

General questions

GR Kumaran

2005-03-30, 3:56 pm

Hello,

1. I read on many Perl/CGI tutorial/articles that it is best to place
and use CGI files in /cgi-bin/ directory than anywhere else, due to
avoid many problems. Buy in our website, we have several subdomain
and those are all use the same /cgi-bin/ directory, so now there are a
lot of files populated there. So now what I have to do to reduce the
management/maintanence problems.

2. I used "use strict", and I get error for the statement
open(IN_FILE1, ">>test_records.txt");

Here the error is
Bareword "IN_FILE1" not allowed while "strict subs" in use ....

But if I remove "use strict", the program works well. So should I
definately do not use "use strict" if the program want to handle I/O
files?

Thank you all.

Greetings,
R. Kumaran

Offer Kaye

2005-03-30, 3:56 pm

On Wed, 30 Mar 2005 09:57:38 +0200, GR Kumaran wrote:
>
> 2. I used "use strict", and I get error for the statement
> open(IN_FILE1, ">>test_records.txt");
>
> Here the error is
> Bareword "IN_FILE1" not allowed while "strict subs" in use ....
>
> But if I remove "use strict", the program works well. So should I
> definately do not use "use strict" if the program want to handle I/O
> files?
>

The line you gave is okay even under "use strict;", so the problem
must be in some code before this line. One problem I saw in the past
was that a module that was used overloaded the "open" function. To
check if this is the case, change your line to:
CORE::open(IN_FILE1, ">>test_records.txt");

Oh, and you should definitly "use strict; use warnings;" everywhere,
in every script you write!!!

--
Offer Kaye

Arjun Mallik

2005-03-31, 3:57 am

Hi Kumaran,

Use strict is used to enforce declaration of variables before we use
them.
Here IN_FILE1 is file pointer variable which u are using and which is
not declared before ,
That is the reason it is working fine when u have removed the use strict
construct.

Thanks
Arjun=0D

Deserve before you desire

=0D

=0D

-----Original Message-----
From: grkumaran@sancharnet.in [mailto:grkumaran@sancharnet.in]=0D
Sent: Wednesday, March 30, 2005 1:28 PM
To: M.L. PERL BEG
Subject: General questions

Hello,

1. I read on many Perl/CGI tutorial/articles that it is best to place
and use CGI files in /cgi-bin/ directory than anywhere else, due to
avoid many problems. Buy in our website, we have several subdomain and
those are all use the same /cgi-bin/ directory, so now there are a lot
of files populated there. So now what I have to do to reduce the
management/maintanence problems.

2. I used "use strict", and I get error for the statement open(IN_FILE1,
">>test_records.txt");

Here the error is
Bareword "IN_FILE1" not allowed while "strict subs" in use ....

But if I remove "use strict", the program works well. So should I
definately do not use "use strict" if the program want to handle I/O
files?

Thank you all.

Greetings,
R. Kumaran

--=0D
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Offer Kaye

2005-03-31, 8:55 am

On Thu, 31 Mar 2005 11:28:04 +0530, arjun.mallik@wipro.com wrote:
>
> Use strict is used to enforce declaration of variables before we use
> them.
> Here IN_FILE1 is file pointer variable which u are using and which is
> not declared before ,
> That is the reason it is working fine when u have removed the use strict
> construct.
>

Not true. Save the following code in a file called "test.pl" and run
it with "perl -w test.pl":
######## begin code
use strict;
open(IN_FILE1,"test.pl");
while(<IN_FILE1> ) {print}
######## end code

As you can see, this code runs without any warnings or errors.
IN_FILE1 is a FILEHANDLE, not a "file pointer variable" (whatever the
heck that is). More to the point, it is not a variable at all, and so
is not affected by "use strict;".

--
Offer Kaye

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