此javascript代码是什么意思？

Question

function myFunc(theObject) {  
      theObject = new TheObject("Ford","Focus",2006);  
} 

Why is new TheObject() used instead of something like new Object() ? I don't understand.

Answer 1

有一个function TheObject(...) “类”的地方，这是建立在你的代码包含在此之前发生， 那就是它的创造。

Answer 2

TheObject是用户定义的对象。

Answer 3

For the code you posted to work, somewhere else on the same page has to be something like the following:

var TheObject = function(make, model, year) {
  this.make = make;
  this.model = model;
  this.year = year;
}

Then, your posted code will create a new object with properties defined by the TheObject function. (In the above example, you could access the make of your new object by referencing theObject.make .)

Answer 4

Here, TheObject is the type of object (class) which "theObject" is. The function with the same name as the type is called a constructor. Calling it constructs a new object of that type. (eg for a TheObject type, new TheObject() creates a new object of the type TheObject)

Think of it this way: The function below makes myAuto a new Car object (of type "Car"):

function myNewFunc(myAuto) {
  myAuto = new Car("Audi","TT",2001);
}

(It's possible the "Object" vs "TheObject" vs "theObject" terminology is confusing you. Where are you getting this sample code?)