in reply to Not an ARRAY reference error

You want

@{ $self->{column} } # Infix notation
or
$self->{column}->@* # Postfix notation

When using the infix dereferencing syntax, the braces can only be omitted when the block amounts to a simple scalar.

@{ $ref } # ok Derefs $ref @$ref # ok Derefs $ref @{ $self->{column} } # ok Derefs $self->{column} @$self->{column} # XXX Derefs $self

See Mini-Tutorial: Dereferencing Syntax.

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