如何在javascript中更新和删除对象值

Question

var key = {“kay_1”：{
                 “sample_1”： “spmedata”                  “sample_2”： “spmedata”         }，     “kay_2”：{
                 “sample_1”： “spmedata”                  “sample_2”： “spmedata”         }     }

现在我的问题是如何更新和删除“kay_2” - ＆gt;“sample_1”键？

Answer 1

可以同时更新两种方式

key.kay_2.sample_1 = "changed value";
key['kay_2']['sample_1'] = "changed value";

for delete is the same

delete key.kay_2.sample_1;
delete key['kay_2']['sample_1'];

Answer 2

var key={"kay_1":{        
             "sample_1":"spmedata",
             "sample_2":"spmedata",
    },
"kay_2":{        
             "sample_1":"spmedata",
             "sample_2":"spmedata",
    }
}

// To update the value
key['kay_2']['sample_1'] = 'new value';

// To delete the key
delete key['kay_2']['sample_1']

Answer 3

修改值try，

key.kay_2.sample_1 = "changed value";

要删除，

delete key.kay_2.sample_1