数组去重

　　 var newArr=[];
    var arr=[1,2,"2",4,9,"a","a",2,3,5,6,5];
    for(var i=0;i<arr.length;i++){
        if(newArr.indexOf(arr[i])<0){
            newArr.push(arr[i]);
        }
    }

function uniq(arr){
        var temp={},newArr=[],val,type;
        for(var i=0;i<arr.length;i++){
            val=arr[i];
            type=typeof val;
            if(!temp[val]){
                //判断是否存在这个js对象键
                temp[val]=[type];
                newArr.push(val);
            }else if(temp[val].indexOf(type) < 0){
                //由于传入的键会自动执行 "toString()"   所以要区别下类型
                temp[val].push(type);
                newArr.push(val);
            }
        }
        return newArr;
    }
    var arr=[1,2,"2",4,9,"a","a",2,3,5,6,5];
    uniq(arr);