Re^4: Use of uninitialized value in hash element at

Sure. This warning is actually means that $attribute is not defined. You probably calling this method like:

$self->get_attribute
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somewhere

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Re^5: Use of uninitialized value in hash element at by Anonymous Monk on Apr 27, 2011 at 18:09 UTC
Hi, thanks for response. I know what is causing this, but I'd just like to return undef if it doesn't exists and value if it exists. Why can't I do that without getting this warning ? It's not clear to me, why I can't "just ask politely" if it exists and return undef if it doesn't without warning... Thanks in advance, regards, Bulek.	[reply]
Re^6: Use of uninitialized value in hash element at by zwon (Abbot) on Apr 28, 2011 at 12:44 UTC
`undef` is invalid value for hash key, since this warning. If you don't want to see it you can check if `$attribute` defined or not: `sub get_attribute { my ( $self, $attribute ) = @_; return defined($attribute) ? $self->{ATTRIBUTES}{$attribute} : und +ef; }` [download]	[reply] [d/l] [select]