Get Unique Value from Array

MXML FILE

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" borderColor="#8E9294"  backgroundGradientAlphas="[1.0, 1.0]" backgroundGradientColors="[#676767, #464444]">
    <mx:Script>
        <![CDATA[
           
            public var arraydata:Array;
           
            public function retriveUniqueVal():void
            {
                arraydata=new Array(1,2,4,1,"kaniskar",4,5,6,"kaniskar",8,1,2,4,5);   
                removeDuplicates(arraydata);
                outputVal.text=removeDuplicates(arraydata).toString();   
                trace(removeDuplicates(arraydata).toString());           
            }
           
        /* Unique Value function */
       
        public var tempArray:Array;        
        private function removeDuplicates(arr:Array):Array
        {
        var currentValue:String = "";
        tempArray=new Array();
        arr.sort(Array.CASEINSENSITIVE);
        arr.forEach(
        function(item:*, index:uint, array:Array):void {
        if (currentValue != item) {
        tempArray.push(item);
        currentValue= item;
        }
        }
        );
        return tempArray.sort(Array.CASEINSENSITIVE);
        }

        ]]>
    </mx:Script>
    <mx:Button x="429" y="234" label="Take Value" click="retriveUniqueVal()"/>
    <mx:Label x="133" y="181" text="Input Values are:" color="#FFFFFF" fontStyle="normal" fontWeight="normal" fontFamily="Arial" fontSize="16"/>
    <mx:Label x="120" y="231" text="Output Values are:" color="#FFFFFF" fontStyle="normal" fontWeight="normal" fontFamily="Arial" fontSize="16"/>
    <mx:TextInput x="262" y="184" editable="false" id="inputVal" text="1,2,4,1,kaniskar,4,5,6,kaniskar,8,1,2,4,5"/>
    <mx:TextInput x="263" y="234" editable="false" id="outputVal"/>
</mx:Application>

OUTPUT