From: Christian Neukirchen <chneukirchen@...>
Date: 2006-03-28T05:18:34+09:00
Subject: Re: rexml - how to get element name

"Nick Sieger" <nicksieger@gmail.com> writes:

> On 3/26/06, Gerald Preissler <Gerald.Preissler@gmx.de> wrote:
>>
>> If I have an instance of REXML::Element, is there a convenient way to
>> get it's element name?
>
>
> It's in the included REXML::Namespace module:
>
> http://ruby-doc.org/stdlib/libdoc/rexml/rdoc/classes/REXML/Namespace.html
>
> element.name

How can one figure that out in pure Ruby?  It's rather easy, once you
know the trick.

irb(main):002:0> require 'rexml/document'
=> true
irb(main):003:0> REXML::Element.instance_method(:name)
=> #<UnboundMethod: REXML::Element(REXML::Namespace)#name>
                                   ^^^^^^^^^^^^^^^^
irb(main):004:0> REXML::Element.instance_method(:to_s)
=> #<UnboundMethod: REXML::Element(REXML::Node)#to_s>
                                   ^^^^^^^^^^^

So, if you *know* you can call a method foo on objects of class Bar,
but just can't find it anywere, inspect Bar.instance_method :foo and
you'll see the defining module.

> Cheers,
> /Nick
-- 
Christian Neukirchen  <chneukirchen@gmail.com>  http://chneukirchen.org