JavaScript基础学习2

 /*
     1.把函数作为参数、匿名函数作为参数传递到函数
 */
 function dogEat(food) {
     console.log("dog eat " + food);
 }

 function catEat(food) {
     console.log("cat eat" + food);
 }

 function eat(food, eatFunction) {
     eatFunction(food);
 }

 eat("bone", dogEat);
 eat("fish", catEat);
 eat("rice", function(x) { console.log("eat " + x); })
     /*
         2.模拟实现类似onClick函数
     */

 var server = {
     'successReq': "req-success",
     'successRes': "res-success",
     'failReq': "req-faied",
     'failRes': "res-faied",
     'onFunc': function(type, callback) {
         switch (type) {
             case 'success':
                 callback(this.successReq, this.successRes);
                 break;
             case 'fail':
                 callback(this.failReq, this.failRes);
                 break;
             default:
                 console.log("No type match!");
                 break;
         }
     }
 };

 var obj1 = Object.create(server);

 function display(req, res) {
     console.log("dis-req: " + req + " dis-res: " + res);
 }

 obj1.onFunc("success", display); //$("#button").on('click',xxxFunc);模拟on函数

 obj1.onFunc("fail", function(res, req) {
     console.log("failed: " + res + req);
 })

 /** 3.对象的某个属性是函数 **/

 obj对象的func属性指向匿名函数
 var obj = {
     func:function (){
         console.log("func");
     }
 };

 obj.func // [Function]
 obj.func() //调用函数，控制台打印 func

 obj对象的func属性指向函数f
 var obj = {
     func:function f(){
         console.log("func");
     }
 };

 obj.func // [Function: f]
 obj.func() //调用函数，控制台打印 func

 属性指向有名称的函数似乎没什么用……