Flex: Swapping two elements in Array Collection

Question

What's the best-approach to swap to elements in a Flex Array Collection?

I am binding a ArrayCollection as a dataprovider to combo-box. Selecting a row, should move the object to the top of the combo-box list, and move the top-object to selected object's position.

score 7 · Answer 1 · answered Apr 26 '11 at 17:37

7

I would do this instead:

dataProvider.addItemAt(dataProvider.removeItemAt(selectedIndex), 0);

The only problem is that this would make the combobox rebind twice, but for simplicity sake it shouldn't be an issue.

answered Apr 26 '11 at 17:37

J_A_X

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score 0 · Answer 2 · answered Apr 26 '11 at 04:48

0

Tried setItemAt?

answered Apr 26 '11 at 04:48

Assaf Lavie

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score 0 · Accepted Answer · answered Apr 26 '11 at 04:53

0

This worked!

      var temp:Object = myDataProvider.getItemAt(0);
      var pos:int = myDataProvider.getItemIndex(selected);

      myDataProvider.setItemAt(selected,0);
      myDataProvider.setItemAt(temp,pos);
      myDataProvider.refresh();

answered Apr 26 '11 at 04:53

Satish

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BUT, this will change items themselves! So, if you referenced on some item of this array collection after this operation its properties will be changed. This is not correct way of swapping items in a list, but this is a way to swap 2 items properties. – radistao Oct 17 '12 at 08:15

Flex: Swapping two elements in Array Collection

3 Answers3