JQuery Map and JSON - Getting Sub Array Elements

Question

I'm using JQuery to get city data from geonames. My problem is when I want to extract the value for sub-array items when using the JQuery map function.

In this example, if I want to get the Wikipedia link, how could I do this?

I tried: wikipedia: item.alternateNames.lang['link']

but didn't expect it would really work. Does anyone know who I can extract the sub array items?

Here are the bits of code:

JSON RESULT

"geonames": [{
"alternateNames": [
  {
    "name": "Rancho Cucamonga",
    "lang": "en"
  },
  {
    "name": "91739",
    "lang": "post"
  },
  {
    "name": "http://en.wikipedia.org/wiki/Rancho_Cucamonga%2C_California",
    "lang": "link"
  }

],
adminCode2": "071",
"countryName": "United States",
"adminCode1": "CA",
"fclName": "city, village,...",
"elevation": 368,
"score": 0.9999999403953552,
"countryCode": "US",
"lng": -117.5931084,
"adminName2": "San Bernardino County",
"adminName3": "",
"fcodeName": "populated place",

JQuery:

$("#city").autocomplete({
        source: function(request, response) {
            $.ajax({
                url: "http://ws.geonames.org/searchJSON",
                dataType: "jsonp",
                data: {
                    featureClass: "P",
                    style: "full",
                    maxRows: 12,
                    name_startsWith: request.term
                },
                success: function(data) {

                    response($.map(data.geonames, function(item) {
                        return {
                            label: item.name + (item.adminName1 ? ", " + item.adminName1 : "") + ", " + item.countryName,
                            value: item.name,
                            latitude: item.lat,
                            longitude: item.lng,

                            // problem here: how to get the value for the alternateNames.lang where lang = link
                            wikipedia: item.alternateNames.lang['link']

                        }
                    }))
                }
            })
        },

Answer 1

Try...

wikipedia: item.alternateNames[2].name

But if you wanted to search them...

var name;
$.each( item.alternateNames, function(){
  if ( this.lang == 'link' ) {
    name = this.name;
    return false;
  }
});