javascript: object Object instead of value from set =(

Question

So, I'm trying to have same data plotted based on a drop down filter, but I haven't gotten past the storing the data to the variable passing to the plotting function. my alert gives object Object, but shouldn't it be totalValue (for this example)?

the html

   <select id="performance_chart_filter">
  <option value="totalValue">Total by Value</option>
  <option value="openValue">Open by Value</option>
  <option value="declinedValue">Declined by Value</option>
  <option value="acceptedValue">Accepted by Value</option>
</select>

the javascript

$j("#performance_chart_filter").change(function(){
    plotWithChoice();
});



function plotWithChoice() {
   var d = {
        "totalValue": {
            label: "Total",
            clickable: true,
            hoverable: true,
            data: <%= @total %>
        }
.
.
.
};

    var filter = $j("#performance_chart_filter");
    var data = [d[filter.val()]];
alert(data);

RoToRa · Accepted Answer · 2010-08-27 14:32:33Z

2

No. filter.val() would most likely be the string "totalValue".

d[filter.val()] (or d["totalValue"]) would be the value of the property totalValue of the object d, which is an object thus the output Object object of the alert, because that's the default string representation of a generic object like this.

And [d[filter.val()]] is a Array with one element namely the object mentioned above.

To debug this, I'd suggest you use a Debugger (such as Firebug), because that can display objects in a readable form.

Or use the .toSource() method:

alert(data.toSource());

answered Aug 27, 2010 at 14:32

RoToRa

38.5k12 gold badges72 silver badges110 bronze badges

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

Comments

Paul Butcher · Accepted Answer · 2010-08-27 14:36:20Z

1

If all the members of the d object are similar to the one shown, and d is in scope, then alert(data) will always will show "object Object".

If filter.val() is "totalValue", then data will be the Object:

{
  label: "Total",
  clickable: true,
  hoverable: true,
  data: <%= @total %>
}

This doesn't have an explicit toString method, so the default toString will be used.

Try alert(data.label), hopefully this will show "Total".

answered Aug 27, 2010 at 14:36

Paul Butcher

6,95630 silver badges40 bronze badges

Collectives™ on Stack Overflow

javascript: object Object instead of value from set =(

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related