From: Robert Klemme <shortcutter@...>
Date: 2011-09-05T23:30:29+09:00
Subject: Re: Ruby and XML

Gavin Kistner wrote in post #1020210:
> On Sep 5, 2011, at 1:28 AM, 7stud -- wrote:
>>    puts "No <value> tag that is a sibling"
>>  end
>>
>>  puts "-" * 20
>> end
>
> For comparison, here's one way to write code with the similar
> functionality using Nokogiri, but ensuring that the <value> element is a
> sibling of the <name> element. Unlike the above code, the following
> allows any number of elements between the <name> and the <value>:
>     require 'nokogiri'
>
>     doc = Nokogiri::XML(IO.read("my.xml"))
>     doc.search('name').each do |name|
>       puts "name: #{name.text}"
>       if value=name.at_xpath('following-sibling::value')
>         puts value.text
>       else
>          puts "No <value> tag that is a sibling"
>        end
>        puts "-" * 20
>     end

You can even use an XPath expression to find names which do not have
proper values:

//name[not(following-sibling::value)]
//name[following-sibling::*[1][name()!="value"]]
//name[count(following-sibling::value)!=1]
//name[following-sibling::*[1][name()!="value"]]|//name[count(following-sibling::value)!=1]

attached and also here: https://gist.github.com/1195114

Kind regards

robert

Attachments:
http://www.ruby-forum.com/attachment/6578/nv.rb


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