Reading JSON data with jQuery

Question

I have a JSON file and i have to read data from this file when the page loads. I suspect there is something wrong with my JSON Structure. JSONLint is showing that it is valid. So i must be using the wrong method to access it.

It is basically an array of objects (or that is what i think).

{"Listings":[
{"Listing1":
    {
        "agency_code":"BP",
        "property_code":"BON1",
        "Property_GUID":"6dded624",
        "FileNo /":"",
        "country":"AUSTRALIA",
        "state":"New South Wales",
        "subregion /":""
            }
        },
   {"Listing1":
    {
        "agency_code":"BPGA",
        "property_code":"BONNSTG4-Lot11",
        "Property_GUID":"6dded624-cde2-429a-81d4-bd6f91256345",
        "FileNo /":"",
        "country":"AUSTRALIA",
        "state":"New South Wales",
        "subregion /":""
            }
        }
    ]
}

I am using the $.ajax to read the JSON. The file is loading successfully. Now how do i access the individual "listings" and how to measure how many Listings are present in total? I tried the $.each to loop through the array but my code is not working.

Answer 1

You have an array of objects, but that array is not the first tier, it's stored in the top-level Listings property.

$.ajax({
    dataType : 'json',
    success  : function (response) {
        for (var i = 0, len = response.Listings.length; i < len; i++) {
            //You can now access individual properties like this:
            var agencyCode = response.Listings[i].Listing1.agency_code;
        }
    }
});

This for loop will perform faster than jQuery's .each() or $.each(): http://jsperf.com/jquery-each-vs-for-loops/2

Here is a demo: http://jsfiddle.net/btHy5/1/