OBJECT ORIENTED PROGRAMMING CONCEPTS IN C NET

Part IVObject-OrientedProgramming16_597043 pt04.qxd 9/20/05 2:03 PM Page 211In this part . . .Object-oriented programming is the most hyped termin the programming world — dot-com and business-to-business e-commerce eclipsed it for a year or two, buttheir high-flyin[r]

panion website has a link to a tutorial on using prototype.js should you wish to investigate further.Complex Tasks Made EasyI’ve detailed just one of the services you can access using SOAP. Go to www.xmethods.net to get an idea of just how many services are available. Services range from the[r]

Where to Go from HereThe keywords abstract and static and the ability to type hint add powerful capabilities that didn’t exist prior to PHP 5. Creating abstract methods enforces specific kinds of behavior, and static methods and data members make the implementation of a singleton pattern both easy a[r]

}Because you’ve implemented the Iterator interface you can traverse your result set using a foreach loop. The while loop above is now replaced by this:foreach($rs as $row ){ echo $row[0]." - ".$row[1]; echo "<br />\n";}As you can see, it is more difficult to implement the Iterator inte[r]

similar fashion the __get method will retrieve name. Is It Worth It?Magic set and get methods are introduced as a convenience, but it is certainly questionable whether they are worth the effort. Encouraging the use of undefined data members can easily lead to difficulties when debugging. For instanc[r]

this shortly.)Built-in FunctionsWe’ve looked at the principal classes and methods of the reflection classes, but there are some built-in PHP functions that can also be helpful when documenting classes. Most of the functions in the Class/Object group have been effectively,[r]

DirectoryItems class—after all, as you learned in Chapter 5, this class is similar to a database table.Using What You KnowPursuing this line of thought, you need to:Filter and order recordsKnow the total number of recordsBe able to extract sequential subsets of the totalOOPHP_02.book Page 65[r]

a:hover,.navigator a:active{ color: #3300CC; background-color: #FAEBF7; text-decoration: none;}Because these hyperlinks look like buttons, it makes sense to assign the same characteristics to each of the different states represented by the pseudo-classes: link, visited, hover, and active. Finally,[r]

can also bring improvement. In this chapter we’ll use inheritance to improve the MySQL classes developed in Chapter 9, by simplifying error trapping and by modifying the behavior of the MySQLResultSet class.Trapping errors is not a job that developers approach with enthusiasm. It is te[r]

static A modifier applied to a class method or variable that allows access to that element without having to create an instance of the class; static variables or methods are common to all instances of a classstudly caps A naming convention in which each appended word of a compound name is cap[r]

To see how this setting can be useful, suppose, in the style of PHP 4, that you do the following:$obj1 =& new Person();With error reporting set to E_STRICT and display_errors set to on, you’ll receive the message:Strict Standards: Assigning the return value of new by reference isdepre[r]

document element, 100–101feed, 4, 13, 101file format, 99structure, 101–102version declaration, 101Sschema, and sqlite_master table, 152scope resolution operatorwith a constant, 82replaces arrow operator, 67and static class, 95scripting language as glue, 2self keyword, 67, 82, 169OOPHP_02.book Page 1[r]

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 simpl[r]

In this chapter you will learn about the following: Frameworks, reusable software subsystems that implement important facilities which many applications can use; the client–server architecture, an important way of designing programs in which the software is divided into two main parts: a client prog[r]

In the previous two chapters, you learned about technologies that software engineers need to master before developing applications. Now, we can start thinking about the particular problem we wish to solve. We will first put effort into understanding the background of the problem, a process called do[r]

Extending SQLite 141How It’s DoneIn this application we take advantage of some of SQLite’s advanced capa-bilities. Both triggers and views will be used. A trigger, code that executes in response to an add, edit, or delete event, will be used to mimic a datestamp field—records will be automati[r]

Don’t let the “Lite” in SQLite lead you to underestimate the capabilities of this database. Because it is bundled with PHP, there is no external server to worry about—think of it as “Lite” in the sense of “no extra baggage.” In some situations it is the ideal database to use. It[r]

query methods. The same effect can be achieved with PDO by using only one line of code: $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);Calling setAttribute against a PDO database connection in this way causes any failed attempt at querying the database to throw a PDOExce[r]

getthumb.php in the browser address bar.Where to Go from HereUsing the ThumbnailImage class enhances your ability to display a directory of images by reducing the size of the images. This is a definite improvement in both aesthetics and performance, because small images download faster[r]

Program Grades - class By Dr. John Abraham Written for CSCI 1370 students Objective: introduce object oriented programming *******************************************/ #include <iostream> #include <iomanip> using namespace std; class Grade { public:[r]