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jonadab

To start with, your Camel book is out of date, but thankfully, http://www.perldoc.com is not. Here is a link to the UNIVERSAL page. You may find this enlightening.

As for my opinion (and I did make a point to say it was my opinion (note the "IMO")) about OO module designers obligations (please keep in mind it is specific to OO modules, as only blessed references inherit from UNIVERSAL). They are my opinions, you and the whole of the perl community have every right to dismiss them as the ravings of a lunatic (believe you wouldn't be the first).

But my assertion that it is bad OO design to break the a method in your base class through some fault of your subclass, actually has nothing (directly) to do with Perl at all. It is just OO design, sure its maybe strict OO design, which Perl is certainly not known for, but if you pick up any (good) book on the subject, I am sure you will find something similar to what I say.

-stvn

In reply to Re: Re: What is this can() and why is breaking it (un)acceptable? by stvn
in thread Why breaking can() is acceptable by tilly

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    [vedagiri89]: how do fix this issue
    [choroba]: This usually happens when you have more than one version of Perl, and you mix the libraries
    [hippo]: Which O/S?
    [vedagiri89]: i have searched many forum...not getting resolutions
    [vedagiri89]: centos
    [Corion]: vedagiri89: Either what choroba said, or maybe you misspelled some module name (on Windows), like use Strict; or something like that.
    [vedagiri89]: @choroba, what to do for that
    [Corion]: Ah, you are not on Windows, so disregard my opinion.
    [vedagiri89]: in centos, how to fix this.
    [choroba]: You have to find out why it happened. Was there an OS update?

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