JS不高效代码示例（参数的传递）

    function Person1(firstName, lastName) {//无法推断参数的含义
        this.firstName = firstName;
        this.lastName = lastName;
        this.toString = function() {
            return this.firstName + " " + this.lastName;
        }
    }

    function Person2(attrs) {//可读性更好，可扩展性更好
        this.firstName = attrs["firstName"]
        this.lastName = attrs["lastName"];
        this.toString = function() {
            return this.firstName + " " + this.lastName;
        }
    }
    var p1 = new Person1("Frank", "Zammetti");
    var p2 = new Person2({
        "firstName" : "Frank",
        "lastName" : "Zammetti"
    });
    alert(p1);
    alert(p2);