JavaScript工厂功能的正确语法是什么？ JavaScript工厂功能语法混乱

发布于 2025-01-30 15:50:26 字数 928 浏览 3 评论 0原文

两者都函数getMyCar1＆amp; GetMyCar2具有相同的结果，但是哪一种是正确的方法？

getMyCar2：为什么值必须使用而不是键？钥匙：价值（Carbrand：Brand）。

function selectCar(brand, model, color){
    return{
        carBrand: brand,
        carModel: model,
        carColor: color, 

        getMyCar1: function(){
            return this.carBrand + " " + this.carModel + " " + this.carColor;  
         //It is said that no need this key word with factory function 
         //but without this key word not working, why?

        },

        getMyCar2: function(){ 
           return brand + " " + model + " " + color;  
           //NotWorking: return carBrand + carModel + carColor
        }
    };
}

让BMW = SelectCar（“ BMW”，“ X6”，“ White”）; console.log（“我的汽车模型是：” + bmw.getmycar1（））;

让audi = selectcar（“ audi”，“ a8”，“ red”）; console.log（“我的汽车模型是：” + audi.getmycar2（））;

原文

Both function getMyCar1 & getMyCar2 has same result but which one is the correct way of doing?

getMycar2: Why value have to use instead of key? key:value (carBrand:brand).

function selectCar(brand, model, color){
    return{
        carBrand: brand,
        carModel: model,
        carColor: color, 

        getMyCar1: function(){
            return this.carBrand + " " + this.carModel + " " + this.carColor;  
         //It is said that no need this key word with factory function 
         //but without this key word not working, why?

        },

        getMyCar2: function(){ 
           return brand + " " + model + " " + color;  
           //NotWorking: return carBrand + carModel + carColor
        }
    };
}

let bmw = selectCar("bmw", "X6", "White");
console.log("My Car Model is: " + bmw.getMyCar1());

let audi = selectCar("Audi", "A8", "Red");
console.log("My Car Model is: " + audi.getMyCar2());

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鱼窥荷 2025-02-06 15:50:26

这取决于您要实现的目标。 IE，
如果您希望该功能返回汽车实例的当前状态，则具有 getMyCar1 函数：
示例：

let bmw = selectCar("bmw", "X6", "White"); 
bmw.carColor= "black"
console.log("My Car Model is: " + bmw.getMyCar2());

结果是：

我的汽车模型是：宝马x6黑色

，我们更改了汽车颜色，并反映在功能中。

另一方面，如果您想要一种显示汽车初始状态的方法， getMyCar2 功能适合您，因为它确实会更改汽车属性。

let audi = selectCar("Audi", "A8", "Red");
audi.carColor = 'black'
console.log("My Car Model is: " + audi.getMyCar2());

我的汽车模型是：奥迪A8红色

getMyCar2 函数使用将函数传递给该函数的参数，因此当在汽车实例中更改任何属性时不会更改其输出

It depends on what you want to achieve. i.e.,
If you want that function to return the current state of a car instance, you have getMycar1 function:
Example:

let bmw = selectCar("bmw", "X6", "White"); 
bmw.carColor= "black"
console.log("My Car Model is: " + bmw.getMyCar2());

Result is:

My Car Model is: bmw X6 black

Here we changed car color and is reflected in the function.

on the other hand if you want a method to show initial state of car, getMyCar2 function is for you as it does change car attributes.

let audi = selectCar("Audi", "A8", "Red");
audi.carColor = 'black'
console.log("My Car Model is: " + audi.getMyCar2());

My Car Model is: Audi A8 Red

getMyCar2 function uses parameters passed to the function as values and so doesnt change its output when any attribute is changed in a car instance

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