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……