<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8" />
<script>
var arr1 = new Array(12, 22, 23, 454, 34);
var arr2 = new Array(23, 234, 23);
Array.prototype.sum = function () { //class 原型
//arr1.sum=function (){ //行间样式 给对象加东西
var result = 0;
for (var i = 0; i < this.length; i++) {
result +=this[i];
}
return result;
};
alert(arr1.sum());
alert(arr2.sum());
</script>
</head>
<body>
</body>
</html>
函数重复---原型
猜你喜欢
转载自www.cnblogs.com/bedfly/p/12524958.html
今日推荐
周排行