原型对象1-100的和 

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
        <script>
               Array.prototype.sum = function () {
                    var res = 0;
                        for (var i = 0; i < this.length; i++) {
                            res += this[i];
                        }
                        return res;
                }
                var arr=[];
                for(var j=1;j<=100;j++){
                    arr.push(j);
                }
                alert(arr.sum());
        </script>
    </body>
</html>

 

posted @ 2017-06-29 11:08  御酒  阅读(139)  评论(0)    收藏  举报