CODEWITHSUNDEEP
perldictionaryhashhashmap
Andras Palfi
Andras Palfi

Reputation: 216

Can't use string as a HASH ref while "strict refs" in use

First off, I know this is a fairly common issue but I have looked around and can't quite seem to pinpoint why its happening to me!

I have some data I am reading from a JSON file, basically all it is are a set of string that represent IDs.

I import it like so:

 my $idFile='IDS.json';
 my $idJSON;



 {
         local $/;
         open my $fh, '<', $idFile or die $!;
         $idJSON = <$fh>;
         close $fh;
 }

 my $id_array = decode_json $idJSON;

This is what $id_array looks like now:

$VAR1 = [
          '3233',
          '2758',
          '2797'
        ];

I then save them with a MISC tag in the form of a hash map, but this is where my "Can't use string ("3233") as a HASH ref while "strict refs" in use " error is being thrown:

my @decodedIDS = map { $_ ->{MISC}} @{$id_array};

Anyone have suggestions as to what is causing this error? Any help is greatly appreciated, as always.

Upvotes: 1

Views: 5533

Answers (1)

Chankey Pathak
Chankey Pathak

Reputation: 21666

I don't understand what you're trying to do but below is the reason of the error.

map { $_->{MISC} } @{$id_array}

means take each element from given dereferenced arrayref and access the MISC key of that element (it is expecting the element to be a hashref). In your case the element is literal string (3233 for example). So it kinda looks like this:

3233->{MISC}

Therefore you get below error:

"Can't use string ("3233") as a HASH ref while "strict refs" in use

Upvotes: 2

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