关于javascript:js修改对象的key

var array = [
    {
        id:1,
        name:"小明"
    },
    {
        id:2,
        name:"小红"
    }
];

转换为

var array = [
    {
        value:1,
        label:"小明"
    },
    {
        value:2,
        label:"小红"
    }
];

办法一：

插入新的key与值删除旧的key与值

var array = [
    {
        id:1,
        name:"小明"
    },
    {
        id:2,
        name:"小红"
    }
];
//旧key到新key的映射
var keyMap = {
    "id" : "value",
    "name" : "label"
};

for(var i = 0;i < array.length;i++){
        var obj = array[i];
        for(var key in obj){
                   var newKey = keyMap[key];
                   if(newKey){
                            obj[newKey] = obj[key];
                            delete obj[key];
                     }
            }
}
console.log(array);

办法二：

利用数组的map办法遍历批改原数组对象

var result = array.map(o=>{return{value:o.id, label:o.name}});
console.log(result);