在文档片段中查找注释或文本节点 [英] Find comment or text nodes in a document fragment
本文介绍了在文档片段中查找注释或文本节点的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我必须清理 Nokogiri::HTML::DocumentFragment 文档(删除仅包含空格的注释节点和文本节点).举个例子:
I have to clean up a Nokogiri::HTML::DocumentFragment document (remove comment nodes and text nodes which contain whitespace only). Here's an example:
html = "<p>paragraph</p><!-- comment --><p>paragraph</p> <p>paragraph</p>"
doc = Nokogiri::HTML::DocumentFragment.parse html
文档片段如您所愿:
#(DocumentFragment:0x3fc65f9f5870 {
name = "#document-fragment",
children = [
#(Element:0x3fc65f9f5064 { name = "p", children = [ #(Text "paragraph")] }),
#(Comment " comment "),
#(Element:0x3fc65f9f4f60 { name = "p", children = [ #(Text "paragraph")] }),
#(Text " "),
#(Element:0x3fc65f9f4e48 { name = "p", children = [ #(Text "paragraph")] })
]
})
如何在此文档片段中找到所有注释或所有文本节点?
How can I find all comment or all text nodes in this document fragment?
以下不起作用,因为它不是一个完整的文档,而是一个文档片段:
The following don't work because it's not a full document but a document fragment:
doc.search('//text()')
doc.search('//comment()')
推荐答案
想通了:
doc.search('.//text()')
doc.search('.//comment()')
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