Add a value to an JSON array object

Question

I have an array that looks like this

[{
    "Inventory": {
        "dashboard_id": "Inventory",
        "filter_by": "Location",
        "yAxis": "Quantity",
        "title": "",
        "chart_type": "-------Select-------",
        "mainchart": "Yes"
    },
    "Quality": {
        "dashboard_id": "Quality",
        "filter_by": "Location",
        "yAxis": "SampleNo",
        "title": "",
        "chart_type": "-------Select-------",
        "mainchart": "Yes"
    }
}]

I need to add more values into each object. How do I ADD to an existing array so it might look something like this

{
    "Inventory": [{
        "dashboard_id": "Inventory",
        "filter_by": "Location",
        "yAxis": "Quantity",
        "title": "",
        "chart_type": "-------Select-------",
        "mainchart": "Yes"
    }, {
        "dashboard_id": "Inventory",
        "filter_by": "Location",
        "yAxis": "Quantity",
        "title": "",
        "chart_type": "-------Select-------",
        "mainchart": "Yes"
    }],
    "Quality": {
        "dashboard_id": "Quality",
        "filter_by": "Location",
        "yAxis": "SampleNo",
        "title": "",
        "chart_type": "-------Select-------",
        "mainchart": "Yes"
    }
}

I add into the array using nestedData[dashId] = data;

Where dashId consist of Quality, 'Inventory', etc.

data is

{
    "dashboard_id": "Inventory",
    "filter_by": "Location",
    "yAxis": "Quantity",
    "title": "",
    "chart_type": "-------Select-------",
    "mainchart": "Yes"
}

Kevin Bowersox · Accepted Answer · 2013-07-15 09:00:16Z

Build a new Object using the literal syntax, which contains the desired arrays and assigns the objects from the source array to the respective property in the object.

var arr = [{
    "Inventory": {
        "dashboard_id": "Inventory",
        "filter_by": "Location",
        "yAxis": "Quantity",
        "title": "",
        "chart_type": "-------Select-------",
        "mainchart": "Yes"
    },
    "Quality": {
        "dashboard_id": "Quality",
        "filter_by": "Location",
        "yAxis": "SampleNo",
        "title": "",
        "chart_type": "-------Select-------",
        "mainchart": "Yes"
    }
}];

var obj = {Inventory:[arr[0].Inventory], Quality:[arr[0].Quality]};
obj.Inventory.push({
    "dashboard_id": "Inventory",
    "filter_by": "Location",
    "yAxis": "Quantity",
    "title": "",
    "chart_type": "-------Select-------",
    "mainchart": "Yes"
});

console.log(obj);

Working Example: http://jsfiddle.net/vJjSX/

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