数组去重

//数组去重
function removeRepeatArr(obj)
{
obj.sort();
var re=[obj[0]];
for(var i = 1; i < obj.length; i++)
{
if( obj[i] !== re[re.length-1])
{
re.push(obj[i]);
}
}
return re;
}

var $arr=[4,1,2,3,4,5];
var $res=removeRepeatArr($arr);
console.log($res);//[1, 2, 3, 4, 5]

var $arr=[4,1,2,3,4,5,'a','b','c','a','a','d','c'];
var $res=removeRepeatArr($arr);
console.log($res);//[1, 2, 3, 4, 5, "a", "b", "c", "d"]

var $arr=[4,1,2,3,4,5,'a','A','c','a','a','A','c'];
var $res=removeRepeatArr($arr);
console.log($res);//[1, 2, 3, 4, 5, "A", "a", "c"]