Difference Module#extend_object and Module#extended

ruby-talk
1

Hi,

I just introduced one callback says

http://www.ruby-doc.org/core-2.0/Module.html#method-i-extend_object.

extend_object(obj) → obj

But I am familiar with Module#extended hook. But not understood while
`Module#extended` we have,then why `Module#extend_object`?

Is there any difference between them?

Thanks

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2

They have complete different uses. #extended is a hook run *after*
you extend an Object using #extend_object.

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On Sun, May 12, 2013 at 9:05 AM, Love U Ruby <lists@ruby-forum.com> wrote:

Hi,

I just introduced one callback says

Class: Module (Ruby 2.0.0).

extend_object(obj) → obj

But I am familiar with Module#extended hook. But not understood while
`Module#extended` we have,then why `Module#extend_object`?

Is there any difference between them?

3

what if you want to add a feature that exending an specific module does
only work for some special objects?

you can raise an error in #extended but in this its allready to late so
you need #extend_object

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4

tamouse mailing lists wrote in post #1108691:

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On Sun, May 12, 2013 at 9:05 AM, Love U Ruby <lists@ruby-forum.com> > wrote:

Is there any difference between them?

They have complete different uses. #extended is a hook run *after*
you extend an Object using #extend_object.

No both of them are hooks,as docs mentioned. Thus I wanted to know while
`extended` hook we have what are the special needs of the hook
`extend_object`?

Thanks

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