javascript - 使用 lodash 获取数组中的重复对象

Question

我尝试通过以下方式获取重复记录，但我得到了唯一的过滤记录意味着只有 uniq 记录获取。

var filtered = _.uniqWith(form_data.itemRows, _.isEqual);

数组列表:

 [
    {
        "PlanId": "",
        "Id": "",
        "Type": "Beverages",
        "Beverages": "2019/12/7 11:40",
        "Frequency": 1
    },
    {
        "PlanId": "",
        "Id": "",
        "Type": "Medication",
        "Beverages": "2019/12/7 11:30",
        "Frequency": 1
    },
    {
        "PlanId": "",
        "Id": "",
        "Type": "Medication",
        "Beverages": "2019/12/7 11:30",
        "Frequency": 1
    }
]

类型、饮料、频率明智地获取重复记录。

Answer 1

这样就可以了

let jsonArray = [
    {
        "PlanId": "",
        "Id": "",
        "Type": "Beverages",
        "ActivityTime": "2019/12/7 11:40",
        "Frequency": 1
    },
    {
        "PlanId": "",
        "Id": "",
        "Type": "Medication",
        "ActivityTime": "2019/12/7 11:30",
        "Frequency": 1
    },
    {
        "PlanId": "",
        "Id": "",
        "Type": "Medication",
        "ActivityTime": "2019/12/7 11:30",
        "Frequency": 1
    }
]
let Result = _.filter(
    _.uniq(
        _.map(jsonArray, function (item) {
            if (_.filter(jsonArray, {
                PlanId: item.PlanId,
                Id: item.Id,
                Type: item.Type,
                ActivityTime: item.ActivityTime,
                Frequency: item.Frequency
            }).length > 1) {
                return item
            }

            return false;
        })),
function (value) { return value; });

console.log(Result)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js"></script>