<script type="text/javascript">
var arr=[0,0,0,1,1,1,2,2,"a","a"];
Array.prototype.uniq=function(){
var temp={};
var newArr=[];
for(var i=0;i<this.length;i++){
if(!temp.hasOwnProperty(this[i])){
temp[this[i]]=this[i];
newArr.push(this[i]);
}
}
return newArr;
}
console.log(arr.uniq())
</script>
