Re^2: Read/Create files

[TANYALYNN82]

Thank you all for your help. I added the $ and now it gives this message: Global symbol "@indexfiles" requires explicit package name at index.pl What does this error mean? Thanks!

[Athanasius]

Hello TANYALYNN82,

You must have done more than just add $ to i, or you would be getting different warning messages. My guess is that you also removed this line:

my @indexfiles;

which would account for the error message you report. The point to understand is that $indexfiles and @indexfiles are two different variables, the first a scalar, the second an array. Changing one has no affect on the other. Now, when you say:

$indexfiles[$i] = ...

you are accessing the element at the $i^th index of the array @indexfiles. If you haven’t declared it first (via my @indexfiles) then use strict will generate the error message you are seeing.

But even when you do declare @indexfiles, the code shown in the OP won’t do what you want, because the scalar variable $indexfiles, which is printed at the end of the foreach loop, is never changed, and so each print will result in a warning like this:

Use of uninitialized value $indexfiles in print at index.pl line...

I don’t know what you are trying to do here, so I can’t advise you further; but please read perlintro, especially Perl variable types.

Two additional points:

• $parts[0] == 'ABC' attempts to compare whatever is in $parts[0] with the string 'ABC' using the numerical comparison operator ==. You should use eq instead.

• While not strictly wrong in this instance, having two lexical variables named $build is certainly confusing. It would be better to choose a different name for the foreach variable.

Hope that helps,

[Mr. Muskrat]

Are you sure it didn't complain about $indexfiles? (Athanasius mentioned it but did not offer a suggestion.)

This: print $indexfiles, "\n";

Should be: print $indexfiles[$i], "\n";