利用函数返回函数_2

//通过A调用只有一个参数的aFunc():chooseFuncBy("A")("A func has only one parameter.");//输出：aFunc():A func has only one parameter.//通过B调用有两个参数的bFunc():chooseFuncBy("B")("leon_1","leon_2");//输出：bFunc():B func has only one parameter.//字符串不符，默认函数chooseFuncBy("wu lala")("I choose A function.");//输出：Welcome to Kingda.org! My blogchooseFuncBy(666)(myObj);var withobj:Object=new Object();var myObj:Object={name:"黑羽",blog:"http://www.kingda.org",hobby:"Starcraft"};/*输出：objectFunc():name:黑羽blog:http://www.kingda.orghobby:Starcraft*/function chooseFuncBy(input:*):Function {//运用一：利用参数的种类来确定返回的参数if (!(input is String)) {return objectFunc;}//运用二：根据参数内容来返回参数switch (input) {case "A" :return aFunc;case "B" :return bFunc;default :return kingdaFunc;}//...更多延伸运用：利用两个参数、is确定不同Class的实例来选择函数，等等}function aFunc(nS:String):void {trace("aFunc():"+nS);}function bFunc(nS:String,nP:String):void {trace("bFunc():"+nS+"/tone more Parameter:"+nP);}function kingdaFunc(...rest):void {trace("Welcome to Kingda.org! My blog");}function objectFunc(kingdaObj:Object):void {trace("objectFunc():");for (var i in kingdaObj) {trace(i+":"+kingdaObj[i]);}}