rails中的数组使用移除重复项

Question

我从网上刮回来了这个数组。看起来是这样的：

[["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"]]

那么会发生什么呢？因此，我希望将上面的数组更改为这个数组(每次都是不同的，因此需要删除重复的数组)：

[["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"]

这之后存在的任何其他东西都是个骗局。

我需要的是一个var的费用和价格，这样我就可以将它保存到数据库中:)

谢谢萨姆

额外的在这里收集任务。

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

您只需将uniq方法添加到从web刮取的数组上，这将从该数组中给出一个uniq值，然后您可以轻松地迭代该数组，将值存储到数据库中。

Answer 2

你可以用

[["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

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"]]