内部阵列的使用情况删除重复项

Question

我有这个数组从网络刮来回来。看起来像这样：

[["formatted_sum_fees", "£5.60"], 
["formatted_price", "£46.50"], 
["formatted_sum_fees", "£4.50"], 
["formatted_price", "£37.50"], 
["formatted_sum_fees", "£3.30"], 
["formatted_price", "£27.50"], 
["formatted_sum_fees", "£3.30"], 
["formatted_price", "£27.50"], 
["formatted_sum_fees", "£4.50"], 
["formatted_price", "£37.50"], 
["formatted_sum_fees", "£4.50"], 
["formatted_price", "£37.50"], 
["formatted_sum_fees", "£4.50"], 
["formatted_price", "£37.50"], 
["formatted_sum_fees", "£5.60"], 
["formatted_price", "£46.50"], 
["formatted_sum_fees", "£4.50"], 
["formatted_price", "£37.50"], 
["formatted_sum_fees", "£5.60"], 
["formatted_price", "£46.50"], 
["formatted_sum_fees", "£4.50"], 
["formatted_price", "£37.50"], 
["formatted_sum_fees", "£3.30"], 
["formatted_price", "£27.50"]] 

那么会发生什么，它重复？所以我想上面的阵列改变这一点（这将是不同的，每次所以就需要删除重复。）：

[["formatted_sum_fees", "£5.60"], 
["formatted_price", "£46.50"], 
["formatted_sum_fees", "£4.50"], 
["formatted_price", "£37.50"], 
["formatted_sum_fees", "£3.30"], 
["formatted_price", "£27.50"] 

别的在此之后存在是一种欺骗。

什么，我需要我的是收费和价格上一些变种，所以我可以下来保存到数据库:)

感谢 山姆

额外 继承人的raketask。

require "nokogiri" 
require "open-uri" 
namespace :task do 
    task test: :environment do 
    ticketmaster_url = "http://www.ticketmaster.co.uk/derren-brown-miracle-glasgow-04-07-2016/event/370050789149169E?artistid=1408737&majorcatid=10002&minorcatid=53&tpab=-1" 
    doc = Nokogiri::HTML(open(ticketmaster_url)) 
    event_name = nil 
    ticket_price = nil 
    doc.xpath("//script[@type='text/javascript']/text()").each do |text| 
     if text.content =~ /more_options_on_polling/ 
     ticket_price = text.to_s.scan(/\"(formatted_(?:price|sum_fees))\":\"(.+?)\"/) 
     byebug 
     end 
    end 

    end 
end 

Answer 1

你只需要添加阵列uniq方法，你已经从网页刮了，这将给你从这个数组中取得一个值，然后你可以很容易地在这个数组上迭代来存储数据到数据库中。

Answer 2

您可以像使用

[["formatted_sum_fees", "£5.60"], 
["formatted_price", "£46.50"], 
["formatted_sum_fees", "£4.50"], 
["formatted_price", "£37.50"], 
["formatted_sum_fees", "£3.30"], 
["formatted_price", "£27.50"], 
["formatted_sum_fees", "£3.30"], 
["formatted_price", "£27.50"], 
["formatted_sum_fees", "£4.50"], 
["formatted_price", "£37.50"], 
["formatted_sum_fees", "£4.50"], 
["formatted_price", "£37.50"], 
["formatted_sum_fees", "£4.50"], 
["formatted_price", "£37.50"], 
["formatted_sum_fees", "£5.60"], 
["formatted_price", "£46.50"], 
["formatted_sum_fees", "£4.50"], 
["formatted_price", "£37.50"], 
["formatted_sum_fees", "£5.60"], 
["formatted_price", "£46.50"], 
["formatted_sum_fees", "£4.50"], 
["formatted_price", "£37.50"], 
["formatted_sum_fees", "£3.30"], 
["formatted_price", "£27.50"]].uniq 

然后结果是：

[["formatted_sum_fees", "£5.60"], ["formatted_price", "£46.50"], ["formatted_sum_fees", "£4.50"], ["formatted_price", "£37.50"], ["formatted_sum_fees", "£3.30"], ["formatted_price", "£27.50"]]