往数组allCourse中的对象添加一个新的数组children:
let allCourse=[ {courseId: 20, courseName: "数据结构(C语言版)"}, {courseId: 22,
courseName: "体验课程(游客)"}, {courseId: 26, courseName: "C程序设计"} ] let data: [
{classId: 32, className: "计科19(0)班"}, {classId: 63, className:
"计算机科学与技术20(6)"}, {classId: 62, className: "计算机科学与技术20(5)"}, {classId: 60,
className: "计算机科学与技术20(2)"}, {classId: 61, className: "计算机科学与技术20(1)"},
{classId: 64, className: "数据结构_教师测试21(0)"}, {classId: 35, className:
"计科20(0)班"} ] for(let i=0;i<allCourse.length;i++){
allCourse[i]["children"]=data; } console.log(allCourse);
插入前:
插入后: