JavaScript work must Know (ix) function arguments and formal parameters

Outline

• Function
• Caller Returning function callers
• Callee calls itself

function

function format

function Getprototynames (o,/*optional*/a)        {            a = a | | [];            For (var p in O)            {                a.push (p);            }            return A;        }

　　

Caller

Func.caller Returning function callers

  function  Callfunc ()        {            if (Callfunc.caller)            {                alert (callfunc.caller.toString ());            } else            {                alert ("No function call");            }        }        function Handlecaller ()        {            callfunc ();        }        Handlecaller ();//Return Handler        Callfunc ();//no function call, return NULL, execute "no function call"

　

Callee

anonymous method Recursive invocation

Alert ((function (x) {           if (x <= 1) return 1;           return x * Arguments.callee (X-1);       } (10))); /362800

　　

JavaScript work must Know (ix) function arguments and formal parameters