为对象的键分配多个值

Question

I have to add multiple key-value pairs to an object.

I have an object called hello .

I know I have to do this to add key-value pairs to hello :

hello['a'] = 1;
hello['b'] = 2;
hello['c'] = 3;

The result will be hello = {'a':1, 'b':2, 'c':3}

I know we can do this to declare variables:

let [a,b,c] = [1,2,3];

In this case a=1, b=2, c=3

Is there an easy way like declaring variables to add key-value pairs to the object?

I know this is an error:

hello['a', 'b', 'c'] = [1,2,3]

Is there a one-line way to add key-value pairs to an object?

Answer 1

You could do something like this:

hello = {
  ...hello,
  a: 1,
  b: 2,
  c: 3
}

Note that this would create a new object reference on hello

Answer 2

You could use destructing assignment for object

 const hello = {} hello["a"] = 1 hello["b"] = 2 hello["c"] = 3 const { a, b, c } = hello console.log(a, b, c)

Or use destructing assignment for array, provided that you use Object.values to get the array of values from that object

 const hello = {} hello["a"] = 1 hello["b"] = 2 hello["c"] = 3 const [a, b, c] = Object.values(hello) console.log(a, b, c)

Answer 3

如果您可以使用 jQuery（因为您添加了 jQuery 标签），这将执行以下操作：

$.extend(hello, {a:1, b:2, c:3})