``` var myData = [ { "name": "pengyaping", "id": 11 }, { "name": "web前端开发", "id": 22 }, { "name": "数组重新组合", "id": 33 } ] var newData = []; //遍历原有的数组 for (var i = 0; i < myData.length; i++) { var myObj = { "newId": myData[i].id } //遍历完的新id加到空数组里 newData.push(myObj); }; console.log(newData); ```