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[英]JavaScript - How to merge/append to an Object/Array - ReactJS - Spread Syntax
[英]How to assign an object some keys by javaScript spread syntax
我有以下对象:
var inv = {roles: {"xxx00": {roleId: "zzzz33"}}, assign: [1, 2, 3] }
结果如下:
{ roles: { "1234": {roleId: null}, "5678": {roleId: null}}}
我需要用以下结果合并对象:
{roles: {"1234": {roleId: null}, "5678": {roleId: null}, "xxx00": {roleId: "zzzz33"}}, assign: [1, 2, 3] }
我需要使用传播语法
知道在不丢失原始roleId的情况下语法应如何获得此结果吗?
以下是两个示例,一个没有对象突变,另一个带有。
let inv = {roles: {"xxx00": {roleId: "zzzz33"}}, assign: [1, 2, 3] }; let res = { roles: { "1234": {roleId: null}, "5678": {roleId: null}}}; // create new object to spec, no mutation. let combine = { roles: { ...inv.roles, ...res.roles, }, assign: [ ...inv.assign ] }; console.log(combine); // mutate original object. console.log(inv); inv.roles = { ...inv.roles, ...res.roles, }; console.log(inv);
只是这样做
const consolidated = {...inv, roles: {...inv.roles, ...result.roles} };
假设您只想将结果角色与inv var角色合并,这将创建基于inv的合并,但结果角色合并在inv角色中。
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