javascript - 当没有键时如何访问嵌套的 json 值？

Question

当值没有键时，如何访问嵌套的 json 值？

我正在尝试访问此 json 对象的“2019-03-19T22:57:47.972Z”值:

var json = {"metaData":[{"name":"ACTION_NAME"},{"name":"SENT_RECV_TIME"}],"rows":[["SI_OA_CTPParameters","2019-03-20T06:20:45.704Z"],["SI_OA_CTPParameters","2019-03-21T06:04:08.313Z"],["SI_OA_CTPParameters","2019-03-21T06:01:14.412Z"],["SI_OA_CTPParameters","2019-03-20T06:59:54.875Z"],["SI_OA_CTPParameters","2019-03-20T20:32:50.975Z"],["SI_OA_CloudDataAddress","2019-03-19T22:57:47.972Z"],["SI_OA_CloudDataAddress","2019-03-19T22:56:52.115Z"],["SI_OA_CloudDataAddress","2019-03-19T22:54:28.196Z"] ......

现在能到达的只是json.rows[0]，它返回:

["SI_OA_CTPParameters","2019-03-21T06:04:08.313Z"]

我尝试过 json.rows[0].[1]但这不起作用。

我只需要第二个值“2019-03-21T06:04:08.313Z”，如何访问它？

Answer 1

您可以使用 json.rows[0][1] 访问嵌套值，如下所示:

var json = {"metaData":[{"name":"ACTION_NAME"},{"name":"SENT_RECV_TIME"}],"rows":[["SI_OA_CTPParameters","2019-03-20T06:20:45.704Z"],["SI_OA_CTPParameters","2019-03-21T06:04:08.313Z"],["SI_OA_CTPParameters","2019-03-21T06:01:14.412Z"],["SI_OA_CTPParameters","2019-03-20T06:59:54.875Z"],["SI_OA_CTPParameters","2019-03-20T20:32:50.975Z"],["SI_OA_CloudDataAddress","2019-03-19T22:57:47.972Z"],["SI_OA_CloudDataAddress","2019-03-19T22:56:52.115Z"],["SI_OA_CloudDataAddress","2019-03-19T22:54:28.196Z"]]};

console.log(json.rows[0][1]);