Is there some value like "" that you want a NULL to be considered equal to? If so, 
if ( ($ret->{val1}||"") eq ($this->{val1}||"") ) ...

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Otherwise, 
if ( defined($ret->{val1}) == defined($this->{val1}) &&
     ($ret->{val1}||"") eq ($this->{val1}||"") ) ...

[download]

In reply to Re: undef-safe equality by ysth
in thread undef-safe equality by hubb0r

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