这是我给的输入
{
header: "dc_header.png"
icon: "dc_icon.png"
id: "DCA"
latitude: 38.89511
longitude: -77.03637
name: "Washington DC"
}
我想在其中添加距离
{
header: "dc_header.png"
icon: "dc_icon.png"
id: "DCA"
latitude: 38.89511
longitude: -77.03637
name: "Washington DC"
**distance: 10**
}
我怎样才能做到这一点?
答案 0 :(得分:1)
您可以通过以下方式向对象添加新的键值对:
read()
您应该将“objectName”更改为对象的名称。
答案 1 :(得分:0)
如果这确实是 React 问题,那么潜在地修改状态是一个坏主意。我建议您将原始对象扩展到一个新对象上,并在最后添加附加属性。
const obj = {
header: "dc_header.png",
icon: "dc_icon.png",
id: "DCA",
latitude: 38.89511,
longitude: -77.03637,
name: "Washington DC"
};
const modifiedObj = {
...obj,
distance: 10
};
console.log(modifiedObj);
.as-console-wrapper { top: 0; max-height: 100% !important; }
如果您要映射对象,可以类似地执行此操作:
const distances = [ 10 ];
const objs = [{
header: "dc_header.png",
icon: "dc_icon.png",
id: "DCA",
latitude: 38.89511,
longitude: -77.03637,
name: "Washington DC"
}];
const modifiedObjs = objs.map((obj, index) => ({
...obj,
distance: distances[index]
}));
console.log(modifiedObjs);
.as-console-wrapper { top: 0; max-height: 100% !important; }