不可变的js更新Record中的键

Question

所以我有一个不可变的js记录：

{
 title: "item 1",
 title2: "item 2",
 title3: "item 3"
}

我要更新密钥，因此它将变为：

{
  new title: "item 1",
  title2: "item 2",
  title3: "item 3"
}

Answer 1

您可以使用delete关键字来删除特定键，然后使用Object.assign对其进行如下追加：

let hello1={ title: "item 1", title2: "item 2", title3: "item 3"};	

delete hello1['title'];

console.log(Object.assign({'new title': "item 1"}, hello1));

Answer 2

let obj = Immutable.fromJS({
    title: "item 1",
    title2: "item 2",
    title3: "item 3"
});

//一根衬纸

obj = obj.set('new_title', obj.get('title')
         .delete('title');