JS中的属性与方法的示例 [英] Example of Properties vs. Methods in JS

问题描述

我对属性和方法之间的语义区别进行了很好的描述(通过 http://www.webdeveloper.com/forum/showthread.php?133712-Properties-Vs.-Methods ):

I found a great description of the semantic difference between Properties and Methods (paraphrased, via http://www.webdeveloper.com/forum/showthread.php?133712-Properties-Vs.-Methods):

属性就像名词.它们具有值或状态.

Properties are like nouns. They have a value or state.

方法就像动词.他们执行动作.

Methods are like verbs. They perform actions.

属性无法执行操作，方法具有的唯一值是完成操作后返回的值.

A property can't perform an action and the only value that a method has is the one that is returned after it finishes performing the action.

例如

属性:门； 可能的值:打开，关闭

Property: door; Possible Values: open, closed

方法:openDoor; 操作:将door属性的值更改为打开"

Method: openDoor; Action: to change the value of the door property to "open"

创建示例:我从理论上理解了这一点，但我无法提出一个示例.是否可以向我展示door/openDoor在实际的Javascript代码中的外观?

Creating an example: I understand this in theory but I can't come up with an example. Would it be possible to show me how the door/openDoor would look in actual Javascript code?

推荐答案

确实，您需要备份并阅读上面发布的一些链接.但举个简单的例子:

Really, you need to back up and read some of the links posted above. But as a quick example:

var house = {} ;

house.isDoorOpen = false ;

house.openDoor = function(){
    house.isDoorOpen = true ;
}

此处house是对象.它具有属性:house.isDoorOpen.在这里，它更像一个形容词.门是打开的(true)还是关闭的(false).听起来，它描述了房屋的属性.

Here house is the object. It has a property: house.isDoorOpen. Here, it is more like an adjective. Either the door is open (true) or closed (false). As it sounds, it describes a property of the house.

此外，它还具有方法openDoor(其用法如下:house.openDoor()).那是它可以做的.在这种情况下，操作openDoor会影响isDoorOpen属性，使其变为true.

Also, it has a method openDoor (which is used like this: house.openDoor() ). That's something that it can do. In this case, the action openDoor affects the isDoorOpen property, making it true.

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