如何循环嵌套对象和数组Javascript？

我有一个包含键和值作为列表的对象

myObj = { "key1": [{"value": 1, "date": "2020"}], [{"value": 2, "date": "2020"}],
          "key2": [{"value": 3, "date": "2020"}], [{"value": 4, "date": "2020"}]
        }

我需要在此嵌套对象中获取“值”键的值，然后将其重新分配为键的数组。

所以我理想的结果是

myObj = { "key1": [1,2],
          "key2": [3,4]
        }

我做了什么

所以我试图遍历对象

for (var [k, v] of Object.entries(myObj)) {
        v.forEach(function convertJSON(arr) {
            console.log(arr.value);
        });
        console.log(k, v);
    }

有用，

1
2
"key1": [{"value": 1, "date": "2020"}], [{"value": 2, "date": "2020"}]
3
4
"key2": [{"value": 3, "date": "2020"}], [{"value": 4, "date": "2020"}]

但是当我尝试重新分配值时，它给我未定义的

for (var [k, v] of Object.entries(myObj)) {
        newValue = v.forEach(function convertJSON(arr) {
            console.log(arr.value);
        });
        v = newValue;
        console.log(k, v);
    }

更新-添加我的数据

所以我觉得应该这样

myData = { "impressions": [{value: 559, end_time: "2020-08-31T07:00:00+0000"}], 
                          [{value: 519, end_time: "2020-09-01T07:00:00+0000"}],
           "reach":      [{value: 334, end_time: "2020-08-31T07:00:00+0000"}],
                         [{value: 398, end_time: "2020-09-01T07:00:00+0000"}}

}