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1 demonstrates a very simple C# program that prints the text string Hello World! to the console screen and provides a line-by-line analysis of that program. However, even that simple program was complex enough that we had to skip some of the details. In this chapter, we ll begin an in-depth exploration of the syntax and structure of the C# language. The syntax of a language is the order of the keywords, where you put semicolons, and so forth. The semantics are what you are expressing in the code, and how your code fits together. Syntax is trivial and unimportant, but because compilers are absolute sticklers for correct syntax, novice programmers pay a lot of attention to syntax until they are comfortable. Fortunately, Visual Studio 2008 makes managing syntax much easier so that you can focus on semantics, which are far more important. In this chapter, we ll introduce statements and expressions, the building blocks of any program. You ll learn about variables and constants, which let you store values for use in your program. We ll also begin an explanation of types, and we ll take a look at strings, which you saw briefly in the Hello World program. This is all very basic stuff, but it s the foundation you need to start getting fancy. Without variables, your applications can t actually process any data. All variables need types, and variables are used in expressions. You ll see how neatly this all fits together.

Displaying Charts from a Portlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350 Portlet Extensions to JFreeChart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354 Portlet Example with a 3D Pie Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . 354 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357

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Note To access schema nodes from within an orchestration, you must set the nodes as distinguished fields from

While transparent indexing is easy and covers most cases, you ll find situations where your application wants Hibernate Search to explicitly index entities. Transparent indexing happens when Hibernate Core applies a change to an entity (add, update, or delete), but at times you ll want to index when no change happens. The initial indexing of an existing database is the most obvious and prominent use case, but it isn t the only one, as you ll see later in this section. Hibernate Search provides a way to directly ask for manual indexing as part of its core API.

Open Notepad and paste the following HTML into it:

{ Assert.assertEquals( event.type, "myButtonClicked" ); }

self.center = CGPointMake(newX,newY); } }

involved in the join do not have to be in any key within the tables involved in the join However, this is quite uncommon, and if you do find you are joining tables, then there is a high chance that a relationship exists between them, which would mean you do require a primary key and a foreign key This was covered in 3 It is possible that one of the columns on one side of the join is actually a concatenation of two or more columns As long as the end result is one column, this is acceptable Also, the two columns that are being joined do not have to have the same name, as long as they both have similar data types For example, you can join a char with a varchar.

If you plan to do any real work with network communications, one of the most useful things you can do is get familiar with a tool that lets you inspect the contents of the messages being sent and received by your computer s network card. Microsoft s Network Monitor program is available for free, as is the open source Wireshark. They can seem a little intimidating at first because of the sheer level of detail they offer, but they re an indispensable tool for diagnosing communication problems, because they show you exactly what messages were sent and what they contained.

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