Question

嗨我相对较新的html和ruby。我有一个div，它有5个表，每个表有相同的类。我想计算这个div中的表数，但它只返回1个表。

我试过了 puts @ browser.div（：id =＆gt;＆＃34; pricingChildrenValuesJWPDIV＆＃34;）。table.rows.length

我怎样才能找到这个表的总数：div please，thanks

Answer 1

一起使用

就像这个例子：

require 'nokogiri'

html_s = '<html>
<div id="pricingChildrenValuesJWPDIV">
<table id="one"></table>
<table id="two"></table>
<table id="three"></table>
</div>
<div id="none">
<table id="one"></table>
<table id="two"></table>
</div>
</html>'

# Parsing HTML document to Nokogiri::HTML::Document
html_doc = Nokogiri::HTML(html_s)

# Use XPath to find all elements (div) with attributes id with value pricingChildrenValuesJWPDIV
# and tables inside this element
tables = html_doc.xpath("//div[@id='pricingChildrenValuesJWPDIV']/table")
# get size of those elements
tables.size
# => 3

# Use XPath to find all elements (div) with attributes id with value none
# and tables inside this element
tables = html_doc.xpath("//div[@id='none']/table")
# get size of those elements
tables.size
# => 2

# Use XPath to find all elements (div) with attributes id with value foo
# and tables inside this element
tables = html_doc.xpath("//div[@id='foo']/table")
# get size of those elements
tables.size
# => 0

我希望这会有所帮助

计算此div中的表数

1 个答案: