css - How to select only table rows with specific content inside -

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i'm scraping email has many table rows, of want exclude. table rows need exactly like:

<tr>   <td class="quantity"> empty </td>   <td class="description"> empty </td>   <td class="price"> empty </td> </tr>

none of table rows have class or id. moreover, there unwanted <table> rows contain cells these classes no values, need table rows have these 3 classes of cells, , 3 cells non-empty values. i'm not sure of syntax this:

body = nokogiri::html(email) wanted_rows = body.css('tr').select{ not sure how encapsulate logic here }

this straightforward xpath:

wanted_rows = body.xpath('//tr[td[(@class = "quantity") , normalize-space()]   , td[(@class = "description") , normalize-space()]   , td[(@class = "price") , normalize-space()]]')

the normalize-space() calls same normalize-space(.) != "", i.e. check current node (the td) contains other whitespace.


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