init javascript object with array property with child objects

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 (e.g. 32).

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

Do you mean you actually want it all to fit on one line, or do you just want to initialize the entire object with one statement? — Zack
– Zack, Commented Mar 26, 2015 at 18:55

CD.. · Accepted Answer · 2015-03-27 06:35:57Z

4

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].

edited Mar 27, 2015 at 6:35

answered Mar 26, 2015 at 18:57

CD..

74.4k25 gold badges160 silver badges170 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

blurfus · Accepted Answer · 2015-03-26 18:57:15Z

0

Do you mean like this?

var obj = {
  doc: 100,
  defaultrateid: 32,
  rates: [{
    rate: 101.00
  }, {
    rate: 121.00
  }],
};

alert(obj.rates[1].rate);

edited Mar 26, 2015 at 18:57

answered Mar 26, 2015 at 18:52

blurfus

14.1k9 gold badges63 silver badges69 bronze badges

3 Comments

Zack Over a year ago

var obj = {doc: 100, defaultrateid: 32, rates: [{rate: 101.00}, {rate: 121.00} ], }; would be one line

Dpeif Over a year ago

This was my first thought, but OP is creating elements [31] and [32] of the array, not just [0] and [1] as in your example. I'm not sure ATM how to do that myself, just wanted to point it out though.

user3720435 Over a year ago

Thanks for response. I updated my original question to help clarify. I need to find a 'rate' based on a unique id, which is why I am using an associative array.

Collectives™ on Stack Overflow

init javascript object with array property with child objects

2 Answers 2

EDIT:

Comments

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

EDIT:

Comments

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related