使用map将字数组里的对象重新组装

// 注意点 map循环的时候 不能够有空的 否则回出问题哦.
var list= [{
"goodsNum": 583816,
"order_num": 0,
"sales": "扬子",
"volume": 0,
"weight": 0
}, null ];

list=[{
        "goodsNum": 583816,
        "order_num": 0,
        "sales": "扬子",
        "volume": 0,
        "weight": 0
    }, {
        "goodsNum": 26484,
        "order_num": 0,
        "sales": "北京",
        "volume": 0,
        "weight": 0
    }, {
        "goodsNum": 24403,
        "order_num": 0,
        "sales": "上海",
        "volume": 0,
        "weight": 0
    }],
     let newarr=list.map(obj=>{
              return obj.sales
     })
    console.log(newarr) // ["扬子","北京","上海"]