CODEWITHSUNDEEP
jsonflashsyntaxactionscript
andy granger
andy granger

Reputation: 29

Actionscript, accessing JSON objects dymically

I am using JSON.parse(event.target.data) to load JSON data into an object.

I then access this object like this

jsonObj.product_1.title

Is it possible to dynamically set "product_1" so I can iterate through a loop for each product.

I am able to do this if each tree of the object has no name, as they can be accessed using [0], but once they have a name I seem to have to use the name.

I am trying to get to

jsonObj.[0].title
jsonObj.[1].title
jsonObj.[2].title

or 

jsonObj.["product_1"].title
jsonObj.["product_2"].title
jsonObj.["product_3"].title

and so on.

Upvotes: 1

Views: 40

Answers (2)

SushiHangover
SushiHangover

Reputation: 74144

You have an Associative Array (Dictionary/Map) and you can iterator the array's items via for in and for each in statements.

Define Associative Array:

var foodBasket:Object = {apple:"Red", orange:"Orange", corn:"Yellow"};

for in iterate-based on the key:

for (var veggie:Object in foodBasket) {
   trace(veggie, foodBasket[veggie] );
}

key iterate output:

[trace] corn Yellow
[trace] apple Red
[trace] orange Orange

for each in iterate-based on value, not key:

for each (var color:Object in foodBasket)
{
   trace(color);
}

value iterate output:

[trace] Yellow
[trace] Red
[trace] Orange

Upvotes: 0

T.J. Crowder
T.J. Crowder

Reputation: 1074385

Your jsonObj.["product_1"].title is very close, just remove the . before the [:

jsonObj["product_1"].title

Note that the string you're using there can be the result of any expression, including a variable lookup.

In JavaScript and ActionScript, you can access an object property with dot notation and a literal property name (obj.foo), or with brackets notation and a string property name (obj["foo"]).*

So for instance:

var n:Number = 0;
while (jsonObj["product_" + n]) {
    // Do something with `jsonObj["product_" + n].title`
    ++n;
}

* JavaScript also now has Symbol property names which you also use brackets with, but that's not germane here.

Upvotes: 1

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