從嵌套對象中選擇密鑰

我在這裏有一種情況。我在這裏有一個對象，它嵌套在另一個對象中，在這裏我想選擇鍵。對象如下所示從嵌套對象中選擇密鑰

var x={ 
    "_shards": { 
     "total": 10, 
     "successful": 5, 
     "failed": 0 
    }, 
    "_all": { 
     "primaries": { 
      "indexing": { 
       "index_total": 4, 
       "index_time_in_millis": 5, 
       "index_current": 0, 
       "delete_total": 0, 
       "delete_time_in_millis": 0, 
       "delete_current": 0 
      } 
     }, 
     "total": { 
      "indexing": { 
       "index_total": 4, 
       "index_time_in_millis": 5, 
       "index_current": 0, 
       "delete_total": 0, 
       "delete_time_in_millis": 0, 
       "delete_current": 0 
      } 
     } 
    }, 
    "indices": { 
     "get56_name": { 
      "primaries": { 
       "indexing": { 
        "index_total": 4, 
        "index_time_in_millis": 5, 
        "index_current": 0, 
        "delete_total": 0, 
        "delete_time_in_millis": 0, 
        "delete_current": 0 
       } 
      }, 
      "total": { 
       "indexing": { 
        "index_total": 4, 
        "index_time_in_millis": 5, 
        "index_current": 0, 
        "delete_total": 0, 
        "delete_time_in_millis": 0, 
        "delete_current": 0 
       } 
      } 
     } 
    } 
}

如何選擇鍵即「get56_name」作爲答案。我不想要的價值，我想選擇關鍵我怎麼能得到它？

來源

2014-09-23 Krishna

你是什麼意思「的意思是我不想要價值？「那麼你將如何處理對象呢？ – 2014-09-23 06:09:11

你想要什麼輸出 – 2014-09-23 06:13:06

可能重複[如何列出JavaScript對象的屬性]（http://stackoverflow.com/questions/208016/how-to-list-the-properties-of-a-javascript-object ） – JJJ 2014-09-23 06:13:57

這將在排列鍵的返回第一個鍵，像"get56_name"

Object.keys(x["indices"])[0]

希望這是你問

來源

2014-09-23 06:14:38

嘗試一下這個：

var your_variable = Object.keys(x.indices)[0];

來源

2014-09-23 06:19:58

從嵌套對象中選擇密鑰

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