展平 Ruby 数组

Question

我有一个看起来像这样的数组。

[{"title"=>"ga:browser=Internet Explorer", "dimensions"=>[{:browser=>"Internet Explorer"}], "metrics"=>[{:pageviews =>2047}]，“id”=>“http://www.google.com/analytics/feeds/data?ids=ga:12316&ga:browser=Internet%20Explorer&start-date=2010- 02-27&end-date=2011-02-27", "已更新"=>#}, {"title"=>"ga:browser=Safari", "dimensions"=>[{:browser= >“Safari”}]、“指标”=>[{:pageviews=>1196}]、“id”=>“http://www.google.com/analytics/feeds/data?ids= ga:12316&ga:browser=Safari&start-date=2010-02-27&end-date=2011-02-27", "更新"=>#}, {"title"=>"ga: browser=Firefox", "dimensions"=>[{:browser=>"Firefox"}], "metrics"=>[{:pageviews=>835}], "id"=>"http: //www.google.com/analytics/feeds/data?ids=ga:12316&ga:browser=Firefox&start-date=2010-02-27&end-date=2011-02-27", "已更新" =>#}, {"title"=>"ga:browser=Chrome", "dimensions"=>[{:browser=>"Chrome"}], "metrics"=>[{:pageviews =>227}]，“id”=>“http://www.google.com/analytics/feeds/data?ids=ga:12316&ga:browser=Chrome&start-date=2010-02- 27&end-date=2011-02-27", "已更新"=>#}, {"title"=>"ga:browser=Mozilla 兼容代理", "dimensions"=>[{:browser= >“Mozilla 兼容代理”}]、“指标”=>[{:pageviews=>60}]、“id”=>“http://www.google.com/analytics/feeds/data? ids=ga:12316&ga:浏览器=Mozilla%20Compatible%20Agent&start-date=2010-02-27&end-date=2011-02-27", "已更新"=>#}, {"title" =>"ga:browser=Opera", "dimensions"=>[{:browser=>"Opera"}], "metrics"=>[{:pageviews=>33}], "id" =>“http://www.google.com/analytics/feeds/data?ids=ga:12316&ga:browser=Opera&start-date=2010-02-27&end-date=2011-02- 27", "已更新"=>#}, {"title"=>"ga:browser=BlackBerry9700", "dimensions"=>[{:browser=>"BlackBerry9700"}], "metrics"= >[{:pageviews=>8}], "id"=>"http://www.google.com/analytics/feeds/data?ids=ga:12316&ga:browser=BlackBerry9700&start- date=2010-02-27&end-date=2011-02-27", "已更新"=>#}, {"title"=>"ga:browser=BlackBerry8900", "dimensions"=>[ {:browser=>"BlackBerry8900"}]、"metrics"=>[{:pageviews=>7}]、"id"=>"http://www.google.com/analytics/feeds/ data?ids=ga:12316&ga:browser=BlackBerry8900&start-date=2010-02-27&end-date=2011-02-27", "更新"=>#}, {"title"=> ;"ga:browser=Mozilla", "dimensions"=>[{:browser=>"Mozilla"}], "metrics"=>[{:pageviews=>2}], "id"=> ;“http://www.google.com/analytics/feeds/data?ids=ga:12316&ga:browser=Mozilla&start-date=2010-02-27&end-date=2011-02-27” , "已更新"=>#}, {"title"=>"ga:browser=Camino", "dimensions"=>[{:browser=>"Camino"}], "metrics"=> [{:pageviews=>1}], "id"=>"http://www.google.com/analytics/feeds/data?ids=ga:12316&ga:browser=Camino&start-date= 2010-02-27&end-date=2011-02-27", "updated"=>#}]

有没有一种简单的方法可以将其压平，使其变为：

[2047,1196 ,835,227,60,33,8,7,2,1]

以及

['Internet Explorer','Firefox','Chrome','Mozilla 兼容代理','Opera','BlackBerry9700 ','Mozilla','卡米诺']

Answer 1

将数组分配给data

pageviews = data.map{|d| d["metrics"][0][:pageviews]} #= [2047, 1196...]

browsers = data.map{|d| d["dimensions"][0][:browser]} #= ['Internet Explorer', 'Firefox', ...]

Answer 2

Flatten 产生一个数组。不过，我想知道，对于输出来说，您似乎真的想要一个以数组作为值的哈希？这就是您要找的吗？

{'title'=>["ga:browser=Internet Explorer", "ga:browser=Safari"]}

如果是这样，类似这样的事情可能会起作用（以 arr 为数组）：

newdata=arr.inject({}) do |memo,subhash|
  subhash.each do |key,val|
    memo[key] ||= []
    memo[key] << val
  end
  memo
end

puts newdata.inspect

puts newdata['title'].inspect