from the desk of stinkpot

explicitly cast variable as an array in perl

January 8th, 2007 by Lawrence David

trying to push values onto my hash of arrays (push($hash{$key},value);), i kept receiving the following error:

Type of arg 1 to push must be array

turns out i needed to explicitly cast my hash value as an array, using @{}:

push(@{$hash{$key}},value);

Posted in Uncategorized | 3 Comments »

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3 Responses to “explicitly cast variable as an array in perl”

1. on 31 Jul 2008 at 4:58 pm   Bill

   Thanks for this. I got hung up with a similar problem.
   Mine was a hash of structs of which each included an array.

   Saved me from beating my head in

2. on 01 Jul 2009 at 12:10 am   Toxoplasma

   Isn’t working for me D:
   My code:
   push( @{$markov{$fullwords}}, $words[$c + $order]);

   print “$fullwords :: ” . $words[$c + $order] . ” :: ” . $markov{$fullwords}[@markov{$fullwords} - 1] . “\n”;

   $fullwords and $words[$c + $order] print fine… Exactly what they should be. They just aren’t getting pushed onto the matrix, it seems…

3. on 14 Jul 2014 at 7:59 am   Avidan Efody

   Works well