Question

有人可以帮助我合并两个对象数组吗，请在javascript中使用loadash？下面是示例数组。我尝试过_merge

arr 1= [
    {
        "areaId": 1,
        "areaName": "areanam222",
        "businessExecutiveId": 1
    },
    {
        "areaId": 2,
        "areaName": "arename",
        "businessExecutiveId": 1
    }
]

arr2 =[
    {
        "id": 1,
        "name": "BN",

    }
]


arrResult =[
    {
        "areaId": 1,
        "areaName": "areanam222",
        "businessExecutiveId": 1,
        "id": 1,
        "name": "BN"    
    }, {
        "areaId": 2,
        "areaName": "arename",
        "businessExecutiveId": 1,
        "id": 1,
        "name": "BN"
    }
]

我尝试了以下选项，但它只返回一条记录。

var arrResult =   _(list).keyBy('businessExecutiveId').merge(_.keyBy(this.typeaheadDataList, 'id')).values() .value();

我也在下面尝试过 const c = _.assign（[]，arr1，arr2）;

我得到的荡妇如下

{ 编号：1 名称：“ BN” }， { areaId：1 areaName：“ ASas”， businessExecutiveId：1 编号：1 名称：“ BN” }

请帮助我

Answer 1

您不需要lodash就能做到这一点。为什么不使用javascripts reduce函数将arr2对象中的所有对象键合并到数组1的对象中，就像这样

arr1.reduce((arr, obj) => {
	const newObj = arr2.reduce((o, insideObj) => ({
		...o,
		...insideObj
	}), obj)

	return [...arr, newObj]
}, [])

Answer 2

如果我们有array comprehension，我们可能会使用以下内容：

[
   for (a of arr1) 
   for (b of arr2) 
   if(a.businessExecutiveId === b.id) {...a, ...b}
]

在没有数组理解的情况下，我们使用flatMap：

_(arr1).flatMap(a =>
  _(arr2).flatMap(b => 
    a.businessExecutiveId === b.id ? [{...a, ...b}] : []        
  ).value()        
).value()

var arr1= [
    {
        "areaId": 1,
        "areaName": "areanam222",
        "businessExecutiveId": 1
    },
    {
        "areaId": 2,
        "areaName": "arename",
        "businessExecutiveId": 1
    },
    {
        "areaId": 3,
        "areaName": "bname",
        "businessExecutiveId": 2
    }
]

var arr2= [
    {
        "id": 1,
        "name": "BN",
    },
    {
        "id": 2,
        "name": "CM",
    }
]

res = _(arr1).flatMap(a =>
  _(arr2).flatMap(b => 
    a.businessExecutiveId === b.id ? [{...a, ...b}] : []        
  ).value()        
).value()

console.log(res)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"></script>

Answer 3

arr1.reduce((arr, obj) => {
	const newObj = arr2.reduce((o, insideObj) => ({
		...o,
		...insideObj
	}), obj)

	return [...arr, newObj]
}, [])

我使用以下代码解决了该问题。

_.map(list, function(item) {

    return _.merge(item, _.find(temp, function(o) {return o.id  == item.businessExecutiveId }) );
});

使用loadash合并两个数组对象

3 个答案: