Instead of passing an array of arrays, Javascript is passing an array of objects

Having issues passing a Javascript Array() to Flash via FlashVars. Can you assist in identifying the error in my setup?

javascript code

// custom array of user-defined cities
var usercities = new Array( 
    {'name':"London", 'latitude':51.5002, 'longitude':-0.1262 },
    {'name':"NYC", 'latitude':51.5002, 'longitude':-0.1262 } 
);

flashvars.newcities = usercities;

flash code

// pre-populated city array shown when no user data entered
var cities:Array = new Array(
    { name:"London", latitude:51.5002, longitude:-0.1262 },
    { name:"NYC", latitude:40.7144, longitude:-74.0060 }
);

// retrieve FlashVars
var newcities:Object = LoaderInfo(this.root.loaderInfo).parameters.newcities;
if(newcities != null) {
    cities = newcities;
};

The current setup is not working as intended. It's crucial to keep the structure of the cities array on the Flash end unchanged. Modifications can be made to the Javascript side.

Your assistance in resolving this matter is greatly appreciated.

javascriptflashactionscript-3arraysflashvars

Answer №1

Unlike some programming languages, JavaScript does not support associative arrays. Instead, you can use objects to create named indexes. When an array is assigned a value with a named index, it essentially becomes an object.

If you want to implement this functionality, you may need to make adjustments to your Flash code. As suggested by meder, serializing your array would be the most effective approach. I recommend using JSON encoding in JavaScript and decoding in Flash for optimal results.

Answer №2

If you prefer, you can create arrays manually like this:

var usercities = [];
usercities[0] = [];
usercities[0]["name"] = "London";
usercities[0]["latitude"] = 51.5002;
usercities[0]["longitude"] = -0.1262;
usercities[1] = [];
usercities[1]["name"] = "NYC";
usercities[1]["latitude"] = 40.7128;
usercities[1]["longitude"] = -74.0060;

Even though the structure is the same, Flash might interpret it differently.

Answer №3

Implemented the values in this manner:

Javascript

var cities = new Array( 
    Array("London", 51.5002, -0.1262),
    Array("NYC", 40.7144, -74.0060),
);

The string is retrieved as a flash.

"London",51.5002,-0.1262,"NYC",40.7144,-74.0060

Then I broke down the string and transformed it into an array. It's not the cleanest method, but it gets the job done in the end. Just make sure each row in the array has exactly 3 items and none of them contain commas.

Sharing this in case it proves helpful to someone.

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