如何将数组推送到Angular中的JSON对象 [英] How to push array to JSON object in angular

问题描述

我有一个像下面这样的obj

I have an obj like below

let obj = {staff_changes: []};

以下是一些测试用例:

1. 测试用例->成功

1. test case --> success

for (let i = 0; i < 4; i++) {
 obj.staff_changes.push({
  id: 'staff'+i
 });
}

测试用例->失败

test case --> failed

let obj = {staff_changes: []};
for (let i = 0; i < 4; i++) {
 obj.staff_changes.push({
  id: i,
  newStaff.push({
   id: 'staff'+i
  });

 });
}
console.log(obj);

在测试用例2中，我试图推送名称为'newStaff'的数组，即使它不在obj中也是如此.

In test case 2, I'm trying to push an array with name 'newStaff' even it is not present in obj.

在控制台中，有4个项目的obj正在显示，但是'newStaff'没有推送到obj.

In console obj with 4 items is displaying but 'newStaff' is not pushing to obj.

推荐答案

newStaff在测试用例2中找不到变量，在for循环内部声明newStaff

newStaff variable not found in test case 2, declare newStaff inside for loop

let obj = {staff_changes: []};

for (let i = 0; i < 4; i++) {
let newStaff=[];
 obj.staff_changes.push({
  id: i,
  newStaff:newStaff.push({
   id: 'staff'+i
  });

 });
}

console.log(obj);

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