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如何获取这组TR标签?

nokogiri ruby

0

Ramy · 技术社区 · 13 年前

这是实际HTML的链接:

doc = Nokogiri::HTML(open('https://www.google.com/finance?q=NYSE%3AAA&fstype=iii'))

以及一个大致的HTML片段:

<div id="incannualdiv">
  <table id="fs-table">
    <tbody>
      <tr>..</tr>
      ...
      <tr>
        <td>Net Income</td>
        <td>100</td>
      </tr>
      <tr>..</tr>
    </tbody>
  </table>
</div>

以下是我正在处理的细节:

doc = Nokogiri::HTML(open('https://www.google.com/finance?q=NYSE%3AAA&fstype=iii'))
div = doc.at "div[@id='incannualdiv']" #div containing the table i want
table = div.at 'table' #table containing tbody i want
tbody = table.at 'tbody' #tbody containing tr's I want
trs = tbody.at 'tr' #SHOULD be all tr's of that table/tbody - but it's only the first TR?

我希望最后一点能给我所有 <TR> 标签,其中将包括 <TD> 我在找,但事实上它只给了我第一个 <TR> .

这是下一篇:

irb(main):023:0> a = nil
=> nil
irb(main):024:0> doc.css('#incannualdiv > #fs-table tr').each { |e| if e.text.include? "Net Income\n"; a = e.text; end}
=> 0
irb(main):025:0> a
=> "Net Income\n\n191.00\n611.00\n254.00\n-1,151.00\n"
irb(main):026:0> a.split"\n"
=> ["Net Income", "", "191.00", "611.00", "254.00", "-1,151.00"]

1 回复 | 直到 13 年前

1

2

mraaroncruz Stephen 13 年前

这应该可以做到。

doc.css('#incannualdiv > #fs-table tr')

at_css (我想 at )返回一个元素,其中 css 返回所有匹配项。

编辑 :对OP意见的答复

你可以在 tr 实际上是其子代中的文本 td s通过使用 text 方法

trs = doc.css('#incannualdiv > #fs-table tr')
# Get column labels from table headers
labels = trs.first.css('th')[1..-1].map(&:text)
net_income_tr = trs.detect { |tr|
  tr.css('td').any? { |td| td.text.strip =~ /^Net Income$/ }
}
# drop first tr that just has Net Income text
# I gave up on error checking. Exercise left to reader ;)
# this will give you an array of floats for your Net Income columns
net_income_columns = net_income_tr.css('td')[1..-1].map { |td| td.text.gsub(',','_').to_f }

labeled_values = net_income_columns.each_with_index.map { |value, i| { label: labels[i].strip, value: value } }