basic object oriented concepts powerpoint

... 50 Session Objectives ■ Discuss the following: • The Object- Oriented approach • Drawbacks of traditional programming • Object- Oriented programming ■ Discuss basic Object- Oriented concepts such as: • Objects • Classes • Properties ... 200 //to object_ data object1 .member_function1(200); //call member function to display data object1 .member_function2(); object2 .member_function1(350); object2 .member_function2(); } Object Oriented ... Session 1/ 39 of 50 Defining Objects ■ exampleclass object1 ,object2 ; defines two objects, object1 and object2 , of class exampleclass. ■ The definition actually creates objects that can be used...

Ngày tải lên: 16/03/2014, 01:20

... Page 26 Friday, May 5, 2006 2:25 PM 2 BASICS OF OBJECT- ORIENTED PROGRAMMING This chapter is aimed at an audience unfamiliar with the basic concepts of object- oriented programming (OOP). The intent ... xiii Introduction xv Chapter 1: What a Tangled Web We Weave 1 Chapter 2: Basics of Object- Oriented Programming 5 Chapter 3: Object- Oriented Features New to PHP 5 11 Chapter 4: Show a Little Class 17 Chapter ... 2006.) OOPHP_02.book Page 2 Friday, May 5, 2006 2:25 PM 3 OBJECT- ORIENTED FEATURES NEW TO PHP 5 PHP 3 was released in mid-1998. Some basic object- oriented (OO) capabilities were included, more or...

Ngày tải lên: 24/01/2014, 15:45

... xiii Introduction xv Chapter 1: What a Tangled Web We Weave 1 Chapter 2: Basics of Object- Oriented Programming 5 Chapter 3: Object- Oriented Features New to PHP 5 11 Chapter 4: Show a Little Class 17 Chapter ... the concepts of object- oriented programming using a language like C++ can be an intimidating experience. The simpler object model of PHP makes it the ideal language for an introduction to object- oriented ... OO features in PHP Object- Oriented PHP will show you how to maximize PHP’s features, with much less work than you might think. With Object- Oriented PHP, you can master the basics of OOP and...

Ngày tải lên: 03/07/2014, 07:20

... wants to make the switch to an OO approach, Object- Oriented PHP can ease the transition from procedural to object- oriented programming (OOP). Basic concepts are introduced using simple but useful ... scripting language really needs to be object- oriented. This chapter deals with issues related to this question. Chapter 2 This chapter introduces the basics of OOP. The intent is not to exhaustively ... implemented in PHP. Chapters 4 through 9 develop some useful classes that demonstrate the basic syntax and concepts of OOP. Code com- patible with PHP 4 and PHP 5 is provided. The remainder of the...

Ngày tải lên: 03/07/2014, 07:20

... Page 9 Friday, May 5, 2006 2:25 PM 2 BASICS OF OBJECT- ORIENTED PROGRAMMING This chapter is aimed at an audience unfamiliar with the basic concepts of object- oriented programming (OOP). The intent ... a few basic concepts of OOP as it relates to PHP, though it is sometimes useful to look at other object- oriented (OO) languages such as Java or C++. We’ll discuss three aspects of object ... 2006 2:25 PM Basics of Object- Oriented Programming 7 between the concept of an integer and a specific variable $x with a specific value. The concept of a class as a template for an object becomes...

Ngày tải lên: 03/07/2014, 07:20

... Object- Oriented Features New to PHP 5 15 This is perfectly acceptable behavior for primitives, but it incurs far too much overhead with objects. Making a copy of a large object by ... tricks. OOPHP_02.book Page 17 Friday, May 5, 2006 2:25 PM 3 OBJECT- ORIENTED FEATURES NEW TO PHP 5 PHP 3 was released in mid-1998. Some basic object- oriented (OO) capabilities were included, more or less ... accessing arrays.” 1 No significant changes were made to the object model when version 4 was released in mid-2000. The basics of object- oriented programming (OOP) were there—you could create a...

Ngày tải lên: 03/07/2014, 07:20

... syntax for creating an object is the same, but in PHP 5, the __construct method is executed rather than a method bearing the class name. NOTE In PHP 5, you need not return the object created by the ... the variable or instance of the object, and new both allocates memory and, in association with the class name, invokes the constructor. (When creating an object under PHP 4, it is advisable ... programming assumes that other programmers may use your objects and vice versa. Bruce Eckel refers to this as client programmers using objects created by class creators. 1 Even if you are...

Ngày tải lên: 03/07/2014, 07:20

... it’s much better to rely on the structure of the language to enforce the appropriate use of an object. OOPHP_02.book Page 33 Friday, May 5, 2006 2:25 PM The ThumbnailImage Class 39 Because this ... create a class instance in two different ways. To accept the default thumbnail size, create an object like so: $thumb = new ThumbnailImage("graphics/My_Picture.jpg"); In this case, ... not be called directly, and the client programmer benefits by having a fully-formed and usable object immediately upon construction. Must It Be Private? Suppose for a moment, though, that your...

Ngày tải lên: 03/07/2014, 07:20

... screening out illegal values. While the need to control the way in which object properties are changed is somewhat obvious, retrieving object properties through an accessor method is also superior to ... appropriate image type before changing the quality. A set method is superior to direct access to an object s properties because values can be tested and rejected, if need be, before they are assigned. ... to have both a set and get method for image quality. The quality property of a ThumbnailImage object is quite different from an image’s MIME type and is not something that must remain fixed....

Ngày tải lên: 03/07/2014, 07:20

... navigator; this will greatly improve the reusability of the class. (This isn’t directly related to object- oriented programming [OOP], but if a class’s appearance cannot blend with various different ... navigator class, but it’s the public methods that allow you to use it. The get and set methods basically allow manipulation or retrieval of the CSS class names for the various components in ... constructor; that’s exactly what the checkRecordOffset method does. It terminates construction of your object if it returns false. Let’s see why. private function checkRecordOffset($recordoffset, $recordsperpage){ ...

Ngày tải lên: 03/07/2014, 07:20

... develop fairly skeletal versions of these two classes, emphasizing any unexplored areas of object- oriented programming (OOP). Nevertheless, these classes will be perfectly fit for the task ... it very clear that a result set is a dependent object. You can’t create one without first having a connection to a server. Instantiating an object of the MySQLResultSet class from within ... we’re going to do in this chapter. I noted earlier that it’s sometimes difficult to identify objects, because often what’s needed is something conceptual rather than something physical and...

Ngày tải lên: 03/07/2014, 07:20

... that is an aggregate object. An aggregate object is an object that has at least one data member that is itself an object. For example, if both Player and Team are objects and Team contains ... behavior of an object when it is displayed, __clone is invoked when you copy your object using the clone operator. This operator (new to PHP 5) allows you to create a copy of an object rather ... something like Object id#3. Because objects are composite, that is, they are made up of a number of data members and methods, it is not readily apparent what the string representation of an object...

Ngày tải lên: 03/07/2014, 07:20

... MySQLException object is displayed. Any object used within a foreach loop must devise its own implementation of the iterator methods. The implementation will differ depending upon the nature of the object an ... always an object. Any Exception that occurs within the scope of the try block will look for a catch that has a matching Exception type as its argument. NOTE The identification of the object type ... MySQLConnect Class The changes required so that the MySQLConnect class can use MySQLException objects are minimal. Of course the MySQLConnect class needs to know about this derived exception...

Ngày tải lên: 03/07/2014, 07:20

Ngày tải lên: 03/07/2014, 07:20

Ngày tải lên: 03/07/2014, 07:20

Ngày tải lên: 03/07/2014, 07:20

Ngày tải lên: 03/07/2014, 07:20

Ngày tải lên: 03/07/2014, 07:20

Ngày tải lên: 03/07/2014, 07:20

Ngày tải lên: 03/07/2014, 07:20