带有数组属性和子对象的初始化javascript对象

Question

Is there a way to initialize a javascript object with an array of child objects in one line? How can I do the following in just on initialization line.

var obj = {doc: 100,
           defaultrateid: 32,
           rates: [],
          };
obj.rates[31] = {rate: 101.00, name: "Rate 1"};
obj.rates[32] = {rate: 121.00, name: "Rate 2"};

Basically what I want is a single javascript object that has my user parameters. This object will be reused on multiple web forms. In the case of 'rates', the forms will have a dropdown to select a rate. The web forms have client side calculations that require the matching rate object based on the rate's unique id (eg 32).

I'm trying to use a associative array instead of having to do looping for finding a match based on unique value.

Answer 1

Seems a bit hacky:

obj = {
    doc: 100,
    defaultrateid: 32,
    rates: (new Array(30)).concat([{
        rate: 101.00,
        name: "Rate 1"
    }, {
        rate: 121.00,
        name: "Rate 2"
    }])
};

---

EDIT:

Maybe you don't really need an array, you can use an object like this:

obj = {
    doc: 100,
    defaultrateid: 32,
    rates: {
        "31": {
            rate: 101.00,
            name: "Rate 1"
        },
        "32": {
            rate: 121.00,
            name: "Rate 2"
        }
    }
};

And you can still get the rates like obj.rates[31] .

Answer 2

Do you mean like this?

 var obj = { doc: 100, defaultrateid: 32, rates: [{ rate: 101.00 }, { rate: 121.00 }], }; alert(obj.rates[1].rate);