Class and instance methods

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  • In object-oriented programming, a class is a construct that is used to create instances of itself – referred to as class instances, class objects, instance objects or simply objects. A class defines constituent members which enable its instances to have state and behavior.[1] Data field members (member variables or instance variables) enable a class instance to maintain state. Other kinds of members, especially methods, enable the behavior of class instances. Classes define the type of their instances.[2]...

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  • After studying this chapter you will be able to understand: What classes, objects, methods and instance variables are; how to declare a class and use it to create an object; how to declare methods in a class to implement the class's behaviors; how to declare instance variables in a class to implement the class's attributes; how to call an object's method to make that method perform its task;...

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  • Lecture 3: Classes and Objects presents returning a value from a method, The this keyword, Access control, Class members, instance members, The static keyword, Defining constants.

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  • This chapter explores Java mechanisms that support the manipulation and calculation of values through method invocations; the use of class and instance variables; and the implementation of constructors, accessors, mutators, and facilitators. The examination begins with the method invocation process.

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  • Chapters Index Syntax For Loops Embedding JavaScript Comparing Ranges Code Reuse on Client and Server Classes and Objects Create an Object Literal if It Does Not Already Exist Chaining Calls to an Object Mixins for classes Cloning an Object (Deep Copy) A CoffeeScript Type Function Class Variables Class Methods and Instance Methods

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  • Graph-based semi-supervised learning (SSL) algorithms have been successfully used to extract class-instance pairs from large unstructured and structured text collections. However, a careful comparison of different graph-based SSL algorithms on that task has been lacking. We compare three graph-based SSL algorithms for class-instance acquisition on a variety of graphs constructed from different domains. We find that the recently proposed MAD algorithm is the most effective.

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  • Instances of a word drawn from different domains may have different sense priors (the proportions of the different senses of a word). This in turn affects the accuracy of word sense disambiguation (WSD) systems trained and applied on different domains. This paper presents a method to estimate the sense priors of words drawn from a new domain, and highlights the importance of using well calibrated probabilities when performing these estimations. By using well calibrated probabilities, we are able to estimate the sense priors effectively to achieve significant improvements in WSD accuracy.

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  • Chapter 4 (part 1) - Defining your own classes. After you have read and studied this chapter, you should be able to: Define a class with multiple methods and data members, differentiate the local and instance variables, define and use value-returning methods, distinguish private and public methods, distinguish private and public data members, pass both primitive data and objects to a method.

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  • After completing this chapter, students will be able to: How static methods and fields are associated with an entire class rather than specific instances of the class, to use common Math methods available in the Java API, to understand the mechanisms for passing information between methods, how the method call/return mechanism is supported by the method call stack and activation records,...

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  • Navigation Bar Revisited 5 6 7 8 9 10 11 12 public class NavigationBar extends MovieClip { private var _navData:Array; public function NavigationBar(navData:Array) { _navData = navData; build(); } In the next code segment, the build() method uses a for loop to add each button to the navigation bar. The loop first creates an instance of the MenuButtonMain class, passing the name of the button as a string for the button’s label.

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  • The Graphics Class Using Bitmap Fills and Lines In addition to applying gradients to fills and lines, you can use bitmaps to decorate your drawing’s fills and lines. Both the beginBitmapFill() and lineBitmapStyle() methods we cover in this section use instances of the BitmapData class. This class handles pixel color and alpha data and allows low-level manipulation of bitmaps. Conveniently, BitmapData is also the data type of bitmaps instantiated from the Flash Professional library using a linkage class.

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  • Classes are reference types that allow you to create instances of objects and use them in special ways to meet your application’s requirement. Another reference type in C# is delegate. Delegates allow you to change the reference to a method at runtime. This means that you can decide the execution of a method at run-time, based on the requirements of your application. The method can be activated at the occurrence of an event, where an event is associated with the delegate to call the method at run-time. ...

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  • Chapter 3 CHAPTER 3 Instance Methods Revisited 4 In Chapter 1, we learned how to create instance methods. In this chapter, we’ll expand that basic knowledge by studying the following additional instance-method topics: • Omitting the this keyword • Bound methods • State-retrieval and state-modification methods • Get and set methods • Extra arguments Along the way, we’ll continue developing the virtual zoo program that we started in Chapter 1. But before we begin, take a minute to reacquaint yourself with the virtual zoo program. Example 3-1 shows the code as we last saw it.

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  • Much of the C# language enables the programmer to specify declarative information about the entities defined in the program. For example, the accessibility of a method in a class is specified by decorating it with the method-modifiers public, protected, internal, and private. C# enables programmers to invent new kinds of declarative information, to specify declarative information for various program entities, and to retrieve attribute information in a run-time environment.

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  • Lecture Java: Chapter 4 (Writing Classes) focuses on: Class definitions, instance data, encapsulation and Java modifiers, method declaration and parameter passing, constructors, graphical objects, events and listeners, buttons and text fields.

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  • In this chapter, you learned to: What is object orientation? Classes and objects; instance variables; methods, operations and polymorphism; organizing classes into inheritance hierarchies; the effect of inheritance hierarchies on polymorphism and variable declarations;...and another content.

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  • This chapter presents the following content: Coding-style conventions, helper methods, encapsulation (with instance variables and local variables), algorithmic design with OOP, top-down design, stubs, merging driver method into driven class, accessing instance variables without using this.

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  • Chapter 2 - Review of object orientation. In this chapter you will learn about the following: The basic principles of object orientation; classes and objects; instance variables, attributes and associations; methods, operations and polymorphism; organizing classes into inheritance hierarchies; evaluating alternative implementations of simple designs in Java.

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  • Bi-Directional List States for Empty List and List Containing Elements Seats are indicated by the class Seat, which extends ListElement. A seat number is assigned to each seat. The class SeatManager is used to implement methods for carrying out the administration rules. The lists of free seats and occupied seats are, respectively, freeSeats and occupiedSeats. Seat instances become elements of each list. Occupied seats are registered in occupiedSeats. The list is managed so that the seats are sorted from the one with the shortest usage time to the one with the longest usage time.

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  • Inheritance so they can behave as a timeline. Lines 9 and 10 create two properties, compact and pickup, and type them as Car and Truck, respectively. Lines 14 and 20 create instances to these classes, passing in values for gas mileage and fuel available. Both compact and pickup are set to the same initial x value (lines 15 and 21), and pickup is given a different y value (line 22) so you can easily see both vehicles once they are added to the display list (lines 17 and 23). The custom methods for both instances are called right away (lines 18...

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