javascript - 在 lodash 中合并两个对象

Question

我有两个对象数组如下:

$scope.var1 = [{
    "field_name": "fname",
    "mapped_field": "firstName",
    "position": 2
}, {
    "field_name": "lname",
    "mapped_field": "lastName",
    "position": 1
}, {
    "field_name": "email",
    "mapped_field": "Email",
    "position": 1
}];

$scope.final = [{
    "field_name": "fname",
    "mapped_field": "lastName",
    "position": 2
}, {
    "field_name": "lname",
    "mapped_field": "firstName",
    "position": 1
}];

在这里我想替换最后一个，其中 ma​​pped_field 与 var1 的 ma​​pped_field 匹配并且 var1 的剩余部分也合并到最后一个。

最终应该是这样的:

$scope.final = [{
    "field_name": "fname",
        "mapped_field": "firstName",
        "position": 2
}, {
    "field_name": "lname",
    "mapped_field": "lastName",
    "position": 1
}, {
    "field_name": "email",
    "mapped_field": "Email",
    "position": 1
}];

任何帮助将不胜感激。

Answer 1

使用 lodash 函数的组合:_.forEach 和 _.assign:

_.forEach($scope.var1, function(varObject) {
    //find object with the same mapped_field
    var finalArrayItem = _.find($scope.final, {mapped_field: varObject.mapped_field});
    if (finalArrayItem) {
        //merge objects
        _.assign(finalArrayItem, varObject);
    } else {
        $scope.final.push(varObject);
    }
});

链接到 jsbin