Javascript object from string property and values

Question

Is it possible to create a property based on string values.

I have a Json object, which used to fill the UI (select box).

"Conf" :{
    "Color":[
        {
            "Value":"BLUE"
        },
        {
            "Value":"GOLD"
        }   
    ],
    "Size":[
        {
            "Value":"12"
        },
        {
            "Value":"11"
        }
    ],
}

Based on the selection, I need to add it to an object (Item.Conf below). addSel provides the selection type (Color, Size etc), and the value (BLUE, 11 etc). How can I add the selection as shown below. So if the choice is Color : BLUE, I need to add it as Item.Conf[0].Color.Value = "BLUE" Is it possible?

Item = {
    Conf: [],
    addSel: function(type, val){ //for example type="Size", val = "11"

        //.... need to selection to Conf 
        // add a member "Size" from type string
        //set its value as val
        console.log(Conf[0].Size.Value) //=> 11
    }
}

In essence is it possible to make an object like

"Size":{
    "Value": 11
}

from strings

jfriend00 · Accepted Answer · 2012-10-05 18:49:36Z

1

Your question is not entirely clear for what exactly you're trying to do, but perhaps you just need to know about using the [variable] syntax to address a property name using a string.

Example:

var x = {};
var propName = "Value";
x[propName] = 11;

This is equivalent to:

var x = {};
x.Value = 11;

But, the first form allows the property name to be a string in a variable that is not known at the time you write the code whereas the second form can only be used when the property name is known ahead of time.

answered Oct 5, 2012 at 18:49

jfriend00

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