后臺給了我一個數據結構作為表頭，我感覺不太好用，想修改一下格式。  var dateInfo = {  week1_end: "2018-09-09",  week1_start: "2018-09-03",  week2_end: "2018-09-16",  week2_start: "2018-09-10",  week3_end: "2018-09-23",  week3_start: "2018-09-17",  week4_end: "2018-09-30",  week4_start: "2018-09-24",  week5_end: "2018-10-07",  week5_start: "2018-10-01"};這些不太好直接循環渲染到頁面上。我想大概修改成這樣的結構好處理了dateInfo = [    {week1_start:"2018-09-03",week1_end:"week1_end"},    {week2_start:"2018-09-03",week2_end:"week1_end"} ]一開始的思路是獲取下滑杠前面一樣的做成一個對象最后放到數組里。但是每次打印發現都不是想象的那樣var new_arr = []for(item in dateInfo){   // console.log(item)   var str1 = item.match(/(\S*)_/)[1];  if (item.includes(str1)) {    var obj = {       item : dateInfo[item]     }   }  new_arr.push(obj) }為什么會這樣??？？？？難道是我的思路錯了嗎