javascript当中arguments用法

arguments
马克- to-win：马克 java社区：防盗版实名手机尾号： 73203。



例 3.8.1

<head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
</head>
<script>
    /*  马克-to-win：when there are n functions with the same function name, only the last one is used.  */
    function test()
    {
        document.writeln("no argument constructor.");
    }
    function test(person)
    {
        document.writeln("马克-to-win2");
        /*Function.arguments[] (Collection) The values passed to the function when it is called.
        马克-to-win: inside function,we can directly use arguments.
        */
        var n = arguments.length;
        document.writeln("n is " + n);
        for (var i = 0; i < n; i++)
        {
            document.writeln("马克-to-win3");
            document.writeln(arguments[i])
        }
        document.writeln(person);
        document.writeln(typeof(person) + "is typeof");
    }
    /*when no param, undefined is passed in. no overloaded function concept.*/
    test();
    /*when there is no this function, program stops here.*/
    change();
    document.writeln("finally");
</script>


输出结果：

马克-to-win2 n is 0 undefined undefinedis typeof




例 3.8.2

<HEAD>

    <meta http-equiv="content-type" content="text/html; charset=utf-8"/>

    <SCRIPT LANGUAGE="JavaScript">
        <!--
        function a(b)
        {
            document.write(document.body.innerHTML + "b is " + b);
            /*Function.arguments[] (Collection)
The values passed to the function when it is called.with firebug, we can directly see arguments*/
            var n = arguments.length;
            document.write(n);
            for (var i = 0; i < n; i++)
            {
                document.write(arguments[i]);
                document.write("ok");
            }
        }
        document.write("part 1");
        //-->
    </SCRIPT>
</HEAD>
<BODY onload='a("a","b","c")'>
part2,onload 会在ｐａｒｔ１和ｐａｒｔ２打印之后再执行。
</BODY>

输出结果：
part 1 part2,onload 会在ｐａｒｔ１和ｐａｒｔ２打印之后再执行。 b is a3aokbokcok