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Table 1.3
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@Entity public class Employee { @EmbeddedId private EmbeddedEmployeePK id; ... }
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RequiredFieldValidator 261 RequiredProperty attribute 346 RequiredScript attribute 345 ResizeAnimation class 358 response HTTP 67 Response.Write 262 REST 142, 176 result parameter 149 role service 183, 191 192 get_roles 192 isUserInRole function 192 load function 192 RPC 142 RSS 463 RSS feed 134 runtime error 450
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These values are part of each book s ISBN, and were you a bookstore or a warehouse, you would probably use a database with these numbers to help keep track of the books you have in stock. In this case, though, you ll just show the user what they selected, including the value. Add two labels to show the results, as shown in Figure 2-23.
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NSString *sql = [NSString stringWithFormat:@"SELECT %@ FROM menu WHERE parentid=%i AND ordering=%i",contenttype,parentid,row]; return [myDB lookupSingularSQL:sql forType:@"text"]; } - (int)integerForMenuWithParent:(int)parentid Row:(int)row content:(NSString *)contenttype {
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As you can see in the fourth row of the table, variations are found in the clients. For example, the Decorator pattern aggregates the interface so that it can share decorations; it provides the original as a construction parameter. The Bridge-up pattern does the same. To make this more concrete, here are the two statements from the clients:
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Listing 4.2
Note that only one <taskdef> is used, but all the tasks within are defined and several are used in the usetasks target.
For loops as expressions (indexof)
Visual Basic is an event-driven language. This is especially true of programs written to run on the Windows desktop. After some important initialization, the user is generally in control of all actions in the program. Who knows what the crazy user will do. He might click here. She might type there. It could be all mayhem and bedlam. But whatever the user does, your program will learn about it through events. Since the first days of Windows, desktop programs have used a message pump to communicate user and system actions to your code. Mouse and keyboard input, system-generated actions, and other notifications from external sources flow into a program s common message queue. The message pump draws these messages out one by one, examines them, and feeds them to the appropriate areas of your code. In traditional Windows programming, you craft the message pump yourself, including code that makes direct calls to event-handling procedures based on the message type. In a Visual Basic program (both in .NET and earlier), the language provides the message pump for you. It analyzes the messages as they are pumped out of the message queue, and directs them to the appropriate code. In .NET, this code appears within classes. Once a class has a chance to analyze the message, it can generate an event, which is ultimately processed by an event handler, a subroutine you write to respond to the action. This calling of the event handler is known as firing an event. So, there are two parts of an event: (1) some code that decides to fire the event; and (2) an event handler that responds to the fired event. Events are really just indirect calls to a procedure. Instead of having the main code call another subroutine directly, it asks .NET to call the other subroutine for it, passing specific arguments that the calling code may wish to include. So, why would you want to do this instead of just making the subroutine call directly For one thing, this indirect method lets you add event handlers long after the initial event-firing code was written. This is good, since the event-firing code may be in a third-party assembly that was written years ago. A second benefit is that one event can target multiple
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afford to ignore the business processes of which your applications is a part; you need a programming model that supports business-process management. Finally, this application includes too much XML. There is no way around metadata in the application, but not all of it has to be in an XML file. Metadata in XML files is great if it changes independently from code. This may be true for navigation rules, but it probably isn t true for the declaration of backing beans and the context they live in. This kind of metadata grows linearly with the size of your application every backing bean must be declared in XML. Instead, you should put an annotation on your class that says, I m a backing bean for JSF, and I live inside the HTTP session (or any other) context. It s unlikely that your class will suddenly change its role without any changes to the class code. If you agree with this analysis, you ll like Seam.
session.createSQLQuery("select u.FIRSTNAME as fname from USERS u") .addScalar("fname");
[NSTimer scheduledTimerWithTimeInterval:0.01 target:self selector:@selector(gameLoop) userInfo:nil repeats:YES]; } - (void) resetBall { Resets ball gameStatus.ballPosition.x = 320/2; to center gameStatus.ballPosition.y = 480/2; float isNegative = random() % 2; int direction = (isNegative < 1) -1 : 1; gameStatus.ballVelocity.x = 4 * direction; gameStatus.ballVelocity.y = 4 * direction; score_1_label.text = [NSString stringWithFormat:@"%d",gameStatus.score[kServer]]; score_2_label.text = [NSString stringWithFormat:@"%d",gameStatus.score[kClient]]; if(gameSession) [self sendNetworkPacket:gameSession packetID:NETWORK_GAME_STATUS withData:&gameStatus ofLength:sizeof(gameInfo) reliable:YES]; }
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