引入nokogiri解析

Question

我有一些XML：

xml = <<-EOT 
<xml> 
    <advcampaign_categories> 
     <category id="85">Sport</category> 
     <category id="79">Mobile</category> 
     <category id="62">Flowers</category> 
    </advcampaign_categories> 
</xml> 
EOT 

，并希望对其进行分析：

id=[] 
text=[] 
doc = Nokogiri::XML(xml) 
doc.search('advcampaign_categories').each do |cat| 
    c = cat.at('category') 
    text << c.text 
    id << c['id']  
end 
h = Hash[text.zip id] 

我的目标是得到这样{sport:85, mobile:79..etc}哈希值。

该代码的问题是它只返回一个元素sport:85。

有什么建议吗？

Answer 1

require 'nokogiri' 

doc = Nokogiri::XML.parse <<-EOT 
<xml> 
    <advcampaign_categories> 
     <category id="85">Sport</category> 
     <category id="79">Mobile</category> 
     <category id="62">Flowers</category> 
    </advcampaign_categories> 
</xml> 
EOT 

# if you are >= 2.1 
doc.css('category').map { |node| [node.text, node['id'].to_i] }.to_h 
# => {"Sport"=>85, "Mobile"=>79, "Flowers"=>62} 
# if you are below version < 2.1 
Hash[doc.css('category').map { |node| [node.text, node['id'].to_i] }] 
# => {"Sport"=>85, "Mobile"=>79, "Flowers"=>62}