去重复方法小集

//js

function removeDumpicatedItem(arr){

	var ret = [];

	for(var i=0;i<arr.length;i++){

		if(ret.indexOf(arr[i]==-1)){

			ret.push(arr[i])

		}

	}

	return ret;

}

//java(无序)

public static List removeDuplicate(List list){

	HashSet hashSet = new HashSet(list);

	list.clear();

	list.add(hashSet);

	return list;

}

//java(有序)
public static List removeDuplicate(List list){

	List ret = new ArrayList();

	for(int i=0;i<list.size();i++){

		if(!ret.contains(list.get(i))){

			ret.add(list.get(i))

		}

	}

	return ret;

}