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https://issues.apache.org/jira/browse/FLEX-26438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13655144#comment-13655144
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Justin Mclean commented on FLEX-26438:
--------------------------------------
Still an issue in Apache Flex 4.9.1
> ArrayCollection - setItemAt API malfunctioning when it has filter function
> ---------------------------------------------------------------------------
>
> Key: FLEX-26438
> URL: https://issues.apache.org/jira/browse/FLEX-26438
> Project: Apache Flex
> Issue Type: Bug
> Components: Collections
> Affects Versions: Adobe Flex SDK 4.1 (Release)
> Environment: Affected OS(s): All OS Platforms
> Affected OS(s): All OS Platforms
> Language Found: English
> Reporter: Adobe JIRA
> Labels: easytest
>
> Steps to reproduce:
> 1.Create an ArrayCollection instance with any data
> public var dp:ArrayCollection = new ArrayCollection(
> [{label:'santosh'},{label:'kumar'}]);
> 2.Create any filter function
>
> dp.filterFunction = function (itemA:Object):Boolean {
> return true;
> }
> dp.refresh();
> 3. Swap elements in the following order
> var item1:Object = dp.getItemAt(0);
> var item2:Object = dp.getItemAt(1);
> dp.setItemAt(item2,0);
> dp.setItemAt(item1,1);
>
> Actual Results:
>
> Swapping failed
> {label:'santosh'},
> {label:'kumar'}
>
> Expected Results:
> {label:'kumar'},
> {label:'santosh'}
>
> Workaround (if any):
> When ArrayCollection has filter function attached to it then Use setItemAt
> API swap the elements starting from the highest order to the lowest.
>
> Do this:
> dp.setItemAt(item1,1);
> dp.setItemAt(item2,0);
> Don't do:
> dp.setItemAt(item2,0);
> dp.setItemAt(item1,1);
> This issue can been reproduced even in previous version of Flex SDK's.
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