Carl Banks a écrit :
On Apr 22, 10:36 am, George Sakkis <[EMAIL PROTECTED]> wrote:
On Apr 22, 10:22 am, Carl Banks <[EMAIL PROTECTED]> wrote:
Java (for example) allows a class to share behavior with only one
other class, and that *severely* limits the opportunities to minimize
redundancy.
Not really; composition is usually a better way to share functionality
and reduce redundancy than inheritance.
I should have known this was coming. I disagree: inheritance is a
much better way to share behavior.
>
(snip)
With composition you're burdening the user with having to learn the
shared relationships that ought to be implementation details of the
class. E.g.,
obj.action_style.perform_action()
>
With inheritance, the user doesn't have to worry about these
relationships.
obj.perform_action()
(snip)
Unless you use composition + delegation (which is a PITA in Java and
close to a no-brainer in Python). In which case this is mostly
transparent to the user code.
Anyway, in Python, inheritence is kind of a special case of
composition+delegation.
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