如何通過ruby中的破解訪問JSON中轉換為哈希的數據？

Question

以下是破解文檔中的示例：

json = '{"posts":[{"title":"Foobar"}, {"title":"Another"}]}'
Crack::JSON.parse(json)
=> {"posts"=>[{"title"=>"Foobar"}, {"title"=>"Another"}]}

但是，我如何實際訪問哈希中的數據？

我嘗試過以下方法：

array = Crack::JSON.parse(json)
array["posts"]

array [“posts”]顯示所有值，但我嘗試了數組[“posts”] [“title”]並且它不起作用。

以下是我要解析的例子：

{"companies"=>[{"city"=>"San Mateo", "name"=>"Jigsaw", "address"=>"777 Mariners Island Blvd Ste 400", "zip"=>"94404-5059", "country"=>"USA", "companyId"=>4427170, "activeContacts"=>168, "graveyarded"=>false, "state"=>"CA"}], "totalHits"=>1}

我想訪問公司下的各個元素......比如城市和名字。

Answer 1

像這樣？

hash = {
  "companies" => [
    {
      "city"           => "San Mateo", 
      "name"           => "Jigsaw", 
      "address"        => "777 Mariners Island Blvd Ste 400", 
      "zip"            => "94404-5059", 
      "country"        => "USA", 
      "companyId"      => 4427170, 
      "activeContacts" => 168, 
      "graveyarded"    => false, 
      "state"          => "CA"
    }
  ], 
  "totalHits" => 1
}

hash['companies'].each{ |i| 
  puts "city => #{i['city']}"
  puts "name => #{i['name']}" 
}
# >> city => San Mateo
# >> name => Jigsaw

hash['companies'][0]['city'] # => "San Mateo"
hash['companies'][0]['name'] # => "Jigsaw"

問題是你沒有考慮companies指向的陣列。