Add arraycollection to arraycollection

Question

I'm pretty new to Flex but I'm taking a few tutorials to try and get the hang of a project I'm working on.

I'm using AS3.

I currently need to just add an arraycollection (A) to an arraycollection (B) that is populating a datagrid. So when the user clicks an option on the left column, the resulting arraycollection (A) will be added to the currently displayed results in the right column.

I think I can just loop through A adding each row to B by using the additem() function, but I'm not exactly sure what syntax to use the loop properly. I also wondered if there was some property of the arraycollection that would give me the number of iterations I'm going to make [something like arraycollectionA.countArrays]

Any help would be greatly appreciated.

Thanks!

NTyler · Accepted Answer · 2013-07-02 04:09:12Z

5

var a : ArrayCollection = new ArrayCollection();
var b : ArrayCollection = new ArrayCollection();
a.addAll(b);

answered Jul 2, 2013 at 4:09

NTyler

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3 Comments

Vegeta Over a year ago

Hi, I have a followup question. What if I wanted to filter out any duplicate entries? So if B already had a record that was in A, it wouldn't be added? [I realize this may be an entirely different issue, so if I need to repost it as a new question, please let me know.]

Vegeta Over a year ago

Do you have any suggestions @NTyler?

NTyler Over a year ago

Traditionally you might use a Set for that, but Actionscript doesn't have Sets. To do this with ArrayCollection is fairly simple, you should be able to find an answer with a quick search but I'll show you anyway: for(var x : Object in b) { if(!a.contains(x)) a.addItem(x); }

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