以前项目中用到自己写的，应该没有bug吧，有更好的也欢迎大家指教，
<script type="text/javascript">
// 以前项目中用到自己写的，应该没有bug吧，有更好的也欢迎大家指教，
var Return_AddStrFn = function (oldArr, newArr) {
var t = this;
//去重复的方法
Array.prototype.unique4 = function () {
// this = arr;
var temp = new Array();
this.sort();
for (i = 0; i < this.length; i++) {
if (this[i] == this[i + 1]) {
continue;
}
temp[temp.length] = this[i];
}
return temp;
}
var a = d = oldArr.unique4(); //旧数组
var b = e = newArr.unique4();//新数组
var c = [];
var dels = [];
function f() {
a.sort();
b.sort();
var i = 0;
var j = 0;
while (i < a.length && j < b.length) {
if (a[i] < b[j]) {
c.push(a[i]);
i++;
} else if (b[j] < a[i]) {
c.push(b[j]);
j++;
} else {
i++;
j++;
}
}
while (i < a.length) {
c.push(a[i]);
i++;
}
while (j < b.length) {
c.push(b[j]);
j++;
}
}
f();
//alert("c:" + c);
//alert("d:" + d);
var addstr = [];
for (var i = 0; i < c.length; i++) {
for (var j = 0; j < e.length; j++) {
if (e[j] == c[i]) {
addstr.push(e[j]);
}
}
}
var difArr = {}
difArr["addstr"] = addstr;
// return addstr; //新增的
for (var i = 0; i < c.length; i++) {
for (var j = 0; j < d.length; j++) {
if (d[j] == c[i]) {
dels.push(d[j]);
}
}
}
difArr["dels"]=dels;
return difArr;
//alert("dels:" + dels); //删除的
}
var arr = ['2000_1', '2000_2', '2000_3', '2000_4', '2000_5', '2000_6', '2000_7','2001_8']; //就得
var arr2 = ['2000_1', '2000_2', '2000_3', '2000_4', '2000_5', '2000_6', '2000_8']//新的
var data = Return_AddStrFn(arr, arr2);
var addStr = data.addstr;
var delStr = data.dels;
alert("addStr:" + addStr);
alert("delStr:" + delStr);
</script>
