获取数组对象里面指定的对象（map方法的使用）

1,数组里面包含对象

var lookMachineList= [

{

add_id: 151

add_name: "ZTO"

add_time: "2019-07-24 09:51:16"

id: 11

is_delete: 0

machine_type: "sx9_95"

machine_vender: "中通"

memo: ""

modify_id: null

modify_name: null

modify_time: null

param_name: "X9s"

resolution_ratio: "375*567"

}，

{

add_id: 1511

add_name: "YTO"

add_time: "2019-07-24 09:51:16"

id: 12

is_delete: 0

machine_type: "sx9_95"

machine_vender: "圆通"

memo: ""

modify_id: null

modify_name: null

modify_time: null

param_name: "X9p"

resolution_ratio: "375*567"

}

]

2，只保留param_name参数值组成的数组对象格式：

[

{param_name: "X9s"},

{param_name: "X9p"}

]

3，代码：

  lookMachineList = lookMachineList.map(element => { return {param_name: element}; });