How do you add class array values

daveman has asked for the wisdom of the Perl Monks concerning the following question:

How do you add an element on to an array within a class. I have the following class

package MyClass;

   my @fields;

sub new
{
   my $this = {};
   $this->{fields}=undef;
    bless $this;
    return $this;
}

sub addValue
{
    push $this->{fields}, "some value";
}

I know this is the incorrect syntax because I am getting an error. Can you use the oush method to add an element? If not, what is the best way to do this?

Comment on How do you add class array values

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Re: How do you add class array values by tomhukins (Curate) on Apr 12, 2001 at 22:23 UTC
Others have already answered your question, but nobody has mentioned that you don't need to use `my @fields;` in the third line of your code. Your `new` method creates an array ref (`$this`) which contains a value whose key is fields. This hash element is independent of any other data structure in your code - it isn't connected to the `@fields` you have already declared.	[reply] [d/l] [select]
Re: How do you add class array values by suaveant (Parson) on Apr 12, 2001 at 22:12 UTC
Your `push $this->{fields}, "some value";` is not right, either... you'll need to do `push @{$this->{fields}}, "some value";` so the hash value will be treated as an array... oh, and packages must end in a true value, so many people put a 1; as the last line of their package - Ant	[reply] [d/l] [select]
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