vue 如何取数组的某个值,vue提取json中，某一个元素的值，并且用value组成一个数组...

这个是瞎捣鼓出来的。需要是做一个下拉select选择框，因为用的是vant，所以代码是这样的

readonly

clickable

name="areaCode"

:value="value"

label="区域编码"

placeholder="点击选择区域编码"

@click="areaCode = true"

/>

show-toolbar

:columns="columns"

@confirm="onConfirm"

@cancel="areaCode = false"

/>

v-model="equipmentCode"

name="equipmentCode"

label="设备编码"

placeholder="请输入设备编码"

:rules="[{ required: true, message: '请输入设备编码' }]"

/>

后台返回了一个数据，一开始数据是这样的，我需要先把areaCode的value值提取出来，放到columns组成一个数组

[{"areaCode":"A001","areaName":"海淀区","id":1,"createdBy":"test","createTime":"2020-10-26 15:06:45","modifyBy":"test","modifyTime":"2020-10-26 15:26:34","isRemoved":"N"},{"areaCode":"A002","areaName":"朝阳区","id":2,"createdBy":"test","createTime":"2020-10-26 15:27:41","modifyBy":"test","modifyTime":"2020-10-26 15:27:52","isRemoved":"N"},{"areaCode":"A003","areaName":"通州区","id":4,"createdBy":"test","createTime":"2020-10-26 15:46:22","modifyBy":"test","modifyTime":"2020-10-26 15:46:22","isRemoved":"N"},{"areaCode":"A004","areaName":"昌平区","id":5,"createdBy":"test","createTime":"2020-10-26 15:46:33","modifyBy":"test","modifyTime":"2020-10-26 15:46:33","isRemoved":"N"},{"areaCode":"A005","areaName":"延庆区","id":6,"createdBy":"test","createTime":"2020-10-26 15:46:47","modifyBy":"test","modifyTime":"2020-10-26 15:46:47","isRemoved":"N"}]

我先提取了一下areacode这个属性，变成

rs.result.map(o=>{return{areaCode:o.areaCode}});

//控制台打印出来的json变成

[{"areaCode":"A001"},{"areaCode":"A002"},{"areaCode":"A003"},{"areaCode":"A004"},{"areaCode":"A005"}]

因为不需要areacode这个key'名字，我又提取了一下变成

rs.result.map(o=>{return[o.areaCode]})

//控制台值变成

[["A001"],["A002"],["A003"],["A004"],["A005"]]

但是还是不符合vant下拉框数据格式，又把获取的value值转换了一下才可以

rs.result.map(o=>{return[o.areaCode].toString()});

//控制台json变成

["A001","A002","A003","A004","A005"]

符合要求了

说了这么多，其实最根本的，就那么一行代码，，，就是看需要啥样数据，就用哪个把

标签：10,26,vue,15,areaCode,value,json,2020,test

来源： https://www.cnblogs.com/wuzhaoyu/p/13964194.html