从嵌套对象中选择Key

Question

我有一个情况。我这里有一个对象，它嵌套在另一个里面，这里我要选择密钥。对象如下所示

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
                }
            }
        }
    }
}

如何选择密钥，即＆＃34; get56_name＆＃34;作为答案。我不想要价值，我想选择关键怎么才能得到它？

Answer 1

这将返回像"get56_name"

这样的键数组中的第一个键

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

希望这就是你所要求的

Answer 2

试试这个：

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