示例：合并对象属性并形成新的数组

                  var arr=[
                        {
                            name:"lisi",
                            age:18,
                            likes:["lol","足球"],
                            alikes:["音乐","电影"],
                            sex:"male"
                        },
                        {
                            name:"lisi",
                            age:18,
                            likes:["ffl","球"],
                            alikes:["bb","影"],
                            sex:"male"
                        },
                        {
                            name:"lisi",
                            age:18,
                            likes:["sdf","足球"],
                            alikes:["xs","hjh"],
                            sex:"male"
                        }
                    ]
                 var sum=[]
                    arr.forEach(item=>{
                         console.log(item);
                         var {name,age,likes,alikes}=item;
                         likes.push(...alikes);
                        console.log(likes);
                        sum.push({
                               name,
                               age,
                               likes,
                        })
                    })
                    console.log(sum)