Как разобрать глубоко вложенный текст из Википедии с помощью Nokogiri?

Question

Я пытаюсь скрести и получить список всех имен игроков из http://en.wikipedia.org/wiki/List_of_current_NBA_team_rosters

Вот мои новичку биты кода:

class AllPlayersScraper 
    attr_accessor :players, :names, :links 

    def initialize(url) 
    @players = Nokogiri::HTML(open(url)) 
    end 

    def get_names 
    @names = @players.css('table[class^="sortable"]') 

    # @names = @players.css("div.span2 a").href 
    end 
end 


require_relative './config/environment.rb' 
rawfeed = "http://en.wikipedia.org/wiki/List_of_current_NBA_team_rosters" 
scraper = AllPlayersScraper.new(rawfeed) 
nbalist = scraper.get_names 

Вот кусок HTML у меня возникают проблемы с. Я не уверен, как развернуть третий <td>, который мне нужен.

<table class="sortable jquery-tablesorter" style=....> 
<thead> 
    // bunch of html... 
</thead> 
<tbody> 
    <tr> 
    <td style="text-align:center;"><span style="display:none" class="sortkey">5.5 !</span><span class="sorttext"><a href="/wiki/Forward-center" title="Forward-center">F/C</a></span></td> 
    <td style="text-align:center;">50</td> 
    <td style="text-align:left;"><a href="/wiki/Lavoy_Allen" title="Lavoy Allen">Allen, Lavoy</a></td> 
    <td><span style="display:none" class="sortkey">81 !</span><span class="sorttext">6 ft 9 in</span> (2.06&#160;m)</td> 
    <td>255 lb (116&#160;kg)</td> 
    <td style="text-align:center;">1989–02–04</td> 
    <td><a href="/wiki/Temple_University" title="Temple University">Temple</a></td> 
    </tr> 

Спасибо!

Answer 1

Долгое время без использования Nokogiri, но это работает:

rawfeed = "http://en.wikipedia.org/wiki/List_of_current_NBA_team_rosters" 
@page = Nokogiri::HTML(open(rawfeed)) 

@all_teams = @page.css('table.toccolours') 

@parsed_teams = [] 
@all_teams.each do |t| 
    team = {} 

    # team name 
    team["name"] = (t.css('tr')[0].css('b').text).gsub(" roster", "") 

    team_players_rows = t.css('table.sortable tr') 
    team["players"] = [] 

    # Skip header and iterate over players 
    team_players_rows.drop(1).each do |tp| 
    team["players"].push(tp.css('td')[2].css('a').text) 
    end 

@parsed_teams << team 
end 

@parsed_teams будет массив со значениями, такими как:

[{"name"=>"Boston Celtics", 
"players"=>["Bass, Brandon", "Bogans, Keith", "Bradley, Avery", 
"Brooks, MarShon", "Crawford, Jordan", "Faverani, Vítor", "Green, 
Jeff", "Humphries, Kris", "Lee, Courtney", "Olynyk, Kelly", "Pressey, Phil", 
"Rondo, Rajon", "Sullinger, Jared", "Wallace, Gerald"]},  
{"name"=>"Brooklyn Nets",...]