On 21 Jun 2004, you wrote in perl.beginners:
> Have a question regarding hashes. Lets say I wanted a list as one of
> the values in my hash for the reason that I would want to constantly
> push values into that list. ..
> $dataHash{"$fileName"}{count} = 1;
> $dataHash{"$fileName"}{increment} = push(@array,$fileNumber);
> ###PROBLEM HERE!
> $dataHash{"$fileName"}{extension} = $fileExtension;
>
> How would I push some data into the $dataHash{"$fileName"}{increment}
> ??? Do I have specify that$dataHash{"$fileName"}{increment} will equal
> a list previous to this???
>
> Thanks in advance for reading this response.
>
> -T
>
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>
Just treat that part of your hash as a list:
push(@{$dataHash{$fileName}{increment}}, $fileNumber);
Here's a small example:
use strict;
use Data::Dumper;
my %dataHash;
my $fileName = 'afile.txt';
my @fileNumbers = qw(1 2 3);
foreach my $fileNumber (@fileNumbers) {
push(@{$dataHash{$fileName}{increment}}, $fileNumber);
}
print Dumper(\%dataHash);
__END__
Data::Dumper is nice to use when you want to see what's in a complex data structure.
Output is something like this:
$VAR1 = {
'afile.txt' => {
'increment' => [
'1',
'2',
'3'
]
}
};
Notice the [ ... ] value for 'incremet' shows you that it is a list.
-Scott
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