in reply to coderef to an object method

Well, first of all... when you do 
data => \&gotodata,

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you're doing essentially the same thing as: 
data => sub { gotodata(@_) },

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(they aren't the same thing, exactly, but they're functionally equivalent for your purposes, one is a named referrence and the other is an anonomous referrence to essentially the same thing). I bother to point that out because then it's easier to see the transition to what you should be doing for method calls, which is this: 
data => sub { $self->gotodata(@_) },

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That is: creating an anonomous subroutine reference for a closure around the method call. 
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Re^2: coderef to an object method
by rinceWind (Monsignor) on Jul 21, 2004 at 09:48 UTC
    data => sub { $self->gotodata(@_) },
    There is a gotcha in this, in that you have just made your anonymous sub into a closure. Note that $self is in the pad space of the surrounding code, and its value is the one object that is around when the line is executed.

    I have seen memory leaks, where the coderef gets stored into a member of $self's hash (or some structure deeper under $self), leading to a subtle circular reference.

    --
    I'm Not Just Another Perl Hacker

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