Shell Programming and Scripting

Hi Guys,
I am trying to run a Perl code which reads the csv file and has to write certain fields to another file .

I see the following when trying to execute the script

Use of uninitialized value in string eq at ./file.pl line 19, <> line 13.
Use of uninitialized value in concatenation (.) or string at ./file.pl line 23, <> line 13.
Use of uninitialized value in substitution (s///) at ./file.pl line 42.

It is throwing the above messages at the following statements:
if ($fname eq ' ')
{
$fname=$lname
}

print FILE "Writing fname=\"$name\" lname=\"$lname\" id=\"$id\" \n";

Could anyone please tell me the root cause for this.


Thanks in advance!!

Please show some more code of your program and csv file as well. It seems that the value in $fname variable is not being set in some cases while spliting the csv file.

My guess is that you have "my $fname;" somewhere near the top of your script, and it isnt being set to anything before the

Code:

if ($fname eq ' ')

If you change it to

Code:

my $fname="";

you wont get the error.

Thanks for the reply.

Basically I am passing the "csv" file as a parameter to the script.
Reading this file in the script like:
@lines=<>;
After this i am splitting the file at commas and writing the data into another array.
open (FL,">>file");
print FL "Print something here\n";
$fname=$fields[0];
$lname=$fields[1]'
$id=$fields[2];
if ($fname eq ' ') {
$fname=$lname;
}
print FL "Write the name=\"$name\" fname=\"$fname\" id=\"$id\" \n";

Thanks!!

---------- Post updated at 04:40 AM ---------- Previous update was at 04:37 AM ----------

Actually I am able to write the data to file though i see these messages. I happened to see in the file that $fname="" $lname="" $id="" ......after it has written some data into the file.
Are these messages considered to be ERRORS or WARNINGS?

U can avoid this by

Code:

$fname=$fields[0] if (defined "$fields[0]");
$lname=$fields[1] if (defined "$fields[1]");
$id=$fields[2] if (defined "$fields[2]");

So, it will assign values to respective variables only if the value is defined.