Drop and add item in Array

[silviotroia]

I'm looking for a way to add a item in a list in a drop position. How can i do that?

i tried to do that without success

<div ui-sortable ng-model="landing.header"> <div ng-repeat="value in landing.header | unique:src" class="" ng-model="landing.header" data-drop="true" jqyoui-droppable="{index:{{$index}},multiple:true, stack:true}">