javascript - 合并嵌套的两个数组的对象

Question

想合并数组的对象。

var arr1 = [
    {nested: {first: "aaa"}},
    {nested: {first: "bbb"}},
    {nested: {first: "ccc"}}
];
var arr2 = [
    {nested: {last: "zzz"}},
    {nested: {last: "yyy"}}
];

一直试图合并这种方式无济于事:

arr1.map((item, i) => {
    return Object.assign({}, 
    {firstName: item.nested.first},
    {lastName: arr2[i].nested.last}) 
})

想要这样:

[
    {first: "aaa", last: "zzz"},
    {first: "bbb", last: "yyy"}
    {first: "ccc"}
];

Answer 1

您必须迭代并将值映射回以合并数组中的每个对象

var arr1 = [
    {nested: {first: "aaa"}},
    {nested: {first: "bbb"}},
    {nested: {first: "ccc"}}
];
var arr2 = [
    {nested: {last: "zzz"}},
    {nested: {last: "yyy"}}
];

var arr3 = arr1.map( (obj,index) => {
    return Object.assign({}, obj.nested, arr2[index] && arr2[index].nested||{});
});

console.log(arr3)

请注意，这假设第一个数组比第二个长，如果没有给定，您必须检查长度并从长度最大的数组开始。