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Parse table using Nokogiri

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一向 2021-01-06 13:16

I would like to parse a table using Nokogiri. I\'m doing it this way

def parse_table_nokogiri(html)

    doc = Nokogiri::HTML(html)

    doc.search(\'table &
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  • 谎友^
    2021-01-06 14:14

    Use:

    td//text()[normalize-space()]

    This selects all non-white-space-only text node descendents of any td child of the current node (the tr already selected in your code).

    Or if you want to select all text-node descendents, regardles whether they are white-space-only or not:

    td//text()

    UPDATE:

    The OP has signaled in a comment that he is getting an unwanted td with content just a ' ' (aka non-breaking space).

    To exclude also tds whose content is composed only of (one or more) nbsp characters, use:

    td//text()[translate(normalize-space(), ' ', '')]
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  • 暗喜
    2021-01-06 14:14

    Simple:

    doc.search('//td').each do |cell|
  puts cell.content
end
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  • 佛祖请我去吃肉
    2021-01-06 14:19

    Simple (but not DRY) way of using alternation:

    require 'nokogiri'

doc = Nokogiri::HTML <<ENDHTML
<body><table><thead><tr><td>NOT THIS</td></tr></thead><tr>
  <td>foo</td>
  <td><font>bar</font></td>
</tr></table></body>
ENDHTML

p doc.xpath( '//table/tr/td/text()|//table/tr/td/font/text()' )
#=> [#<Nokogiri::XML::Text:0x80428814 "foo">,
#=>  #<Nokogiri::XML::Text:0x804286fc "bar">]

    See XPath with optional element in hierarchy for a more DRY answer.

    In this case, however, you can simply do:

    p doc.xpath( '//table/tr/td//text()' )
#=> [#<Nokogiri::XML::Text:0x80428814 "foo">,
#=>  #<Nokogiri::XML::Text:0x804286fc "bar">]

    Note that your table structure (and mine above) which does not have an explicit tbody element is invalid for XHTML. Given your explicit table > tr above, however, I assume that you have a reason for this.

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