as3corelib JSON parsing problem - json

Question

I have the following two routines in Flash Builder:
public function getData():void {
httpService = new HTTPService();
httpService.url = "https://mongolab.com/api/1/databases/xxx/collections/system.users/?apiKey=xxx";
httpService.resultFormat = HTTPService.RESULT_FORMAT_TEXT;
httpService.addEventListener(ResultEvent.RESULT, resultHandler);
httpService.send();
}
public function resultHandler(event:ResultEvent):void {
var rawData:String = String(event.result);
var arr:Array = JSON.decode(rawData) as Array;
Debug.log(rawData);
Debug.log(arr);
httpService.removeEventListener(ResultEvent.RESULT, resultHandler);
}
rawData is displayed as JSON data but arr is displayed as [object Object] rather than an array.
What am I doing wrong?

Answer 1

this
var jsonStr:String = '{"glossary": {"title": "example glossary","GlossDiv": {"title": "S"},"GlossSee": "markup"}}';
will be parsed and JSON.decode returns an Object and you can access the attributes like this:
var obj:* = JSON.decode(jsonStr);
trace(obj.glossary);
this
var jsonStr:String = '[{"title":"asd"},{"title":"asd"},{"title":"asd"},{"title":"asd"}]';
will be parsed and returns an Array (which if you trace it, will return [object Object]).
so if you don't know what data is returned you could just check if
var result:* = JSON.decode(jsonStr);
if (result.length != undefined) {
// array
var arr:Array = result as Array;
}
else {
// object
var obj:Object = result as Object;
}
a try/catch around decode would also be good, because you don't know if the jsonStr is well-formed...
cheers