Quotes About Object

There is no need for explanatory models to be object models, and it is generally best if they are not.

Complex object creation is a responsibility of the domain layer, yet that task does not belong to the objects that express the model.

using constructors still doesn't prevent us from changing an object into something else later, because

That's because the default prototype for any instance you create (assuming you don't change it) is Object.

Math is not a constructor, or even a function. It's an object. As you know, Math is a built-in object that you can use to do things like get the value of pi (with Math.PI) or generate a random number (with Math.random). Think of Math as just like an object literal that has a bunch of useful properties and methods in it, built-in for you to use whenever you write JavaScript code. It just happens to have a capital first letter to let you know that it's built-in to JavaScript.

An object literal is an instance of Object. Think

JavaScript has a very powerful object model, but one that is a bit different than the status quo object-oriented language. Rather than the typical class-based object-oriented system, JavaScript instead opts for a more powerful prototype model, where objects can inherit and extend the behavior of other objects. What

When you delete a property, you're not just deleting the value of the property, you're deleting the property itself. And, if you try to use fido.dogYears after deleting it, it will evaluate to undefined.

A string is always a primitive unless you create it in a special way using an object constructor. We'll talk about object constructors later. And you can always use the typeof operator on your variable to see if it is of type string or object.

two forms of the Adapter Pattern: object and class adapters. Class adapters require multiple inheritance. You can implement more

Q: Q: You said getElementsByTagName returns a list. Do you mean an array? A: A: It returns an object that you can treat like an array, but it's actually an object called a NodeList. A NodeList is a collection of Nodes, which is just a technical name for the element objects that you see in the DOM tree. You

Joe: What's the target? Judy: Like I said, it's the element that generated the event. Like if you click on a specific image, the target will be that image.

A remote proxy acts as a local representative to a remote object.

When you pass a primitive value it is copied into the parameter. We call this "passing by value." So if you change the value of the parameter in your function body it has no affect on our original argument's value. The exception to this is passing an array or object, and we'll get to that in a bit.

Using a method to change a property is another example of encapsulation whereby we can often improve the maintainability and extensibility of code by letting an object worry about how it gets things done. It's

In fact, there's a keyword in JavaScript named this, and that is exactly how you tell JavaScript you mean this object we're in.

A callback works like this: give a function to the object that knows about the event. When the event occurs, that object will call you back, or notify you, by calling that function. You're going to see this pattern in JavaScript for a variety of events.

As it turns out, one of the things the new operator does behind the scenes when the object is created is to store information that allows it to determine, at any time, the constructor that created the object. And

Window is the global object. It may seem a little weird, but the window object acts as your global environment, so the names of any properties or methods from window are resolved even if you don't prepend them with window. In addition, any global variables you define are also put into the window namespace, so you can reference them as window.myvariable.

When you call an object's method, this is set to the object whose method was called. If the method is not found in that object, and is found in the prototype, that doesn't change the value of this. this always refers to the original object — that is, the object whose method was called — even if the method is in the prototype. So

But forgive me if I cannot help expressing my fear that you are nevertheless deluding yourself into principles which have but too much tendency to counteract your own object, and to render your virtues and your talents useless both to yourself and mankind.

The factor Hegel excludes is the mystery of a history that wends its way into the future without our knowing its end. History as a whole is essentially not an object of cognition; the meaning of the whole is not discernible.

Love is not primarily a relationship to a specific person; it is an attitude, an orientation of character which determines the relatedness of a person to the world as a whole, not toward one "object" of love. If a person loves only one other person and is indifferent to the rest of his fellow men, his love is not love but a symbiotic attachment, or an enlarged egotism. Yet, most people believe that love is constituted by the object, not by the faculty.

The background events in the soul are projected outwards and are experienced through the object, as a synthetic unity compounded of external reality and the psychic activation of this reality.