programmer s guide to c 5 0

... Environment Chapter - C# Quickstart Chapter - Exception Handling Chapter - Classes 101 Chapter - Base Classes And Inheritance Chapter - Class Member Accessibility Chapter - Other Class Stuff Chapter - Structs ... information on translations, please contact Apress directly at 901 Grayson Street, Suite 204 , Berkeley, CA, 947 10 Phone: 51 0 -54 9 -59 31; Fax: 51 0 -54 9 -59 39; info@apress.com ; http://www.apress.com The information ... mscorlib.dl l ) This might be used to switch to a different standard library for a specific target device /nostdlib[+|-] /recurse: Search subdirectories for files to compile /r[eference]: Specify

Ngày tải lên: 10/12/2013, 16:15

... magic_quotes_gpc is activated, all special characters contained in user or database data will automatically be escaped with the necessary backslash By the way, “gpc” stands for “get/post/cookie” Personally, ... magic_quotes_gpc is “on”, then never physically escape special characters with a backslash; otherwise, make it a habit to always so track_vars 22 Gilmore _01 12 /5/ 00 10: 22 AM Page 23 An Introduction ... file as “phpinfo.php” to the Apache? ?s document root directory This is the directory called htdocs located in whatever directory you specified in step 19 Gilmore _01 12 /5/ 00 10: 22 AM Page 20 Chapter

Ngày tải lên: 09/08/2014, 12:22

... languages, a set of delimiters is used to represent special characters, such as the tab or newline characters Table 2-1 lists the supported delimiters: Table 2-1 Supported String Delimiters CHARACTER ... better code readability 66 Gilmore _03 12/4 /00 1 :04 PM Page 67 Expressions, Operators, and Control Structures Alternative Enclosure Bracketing Control structures are enclosed in a set of brackets to ... characters from 127 through 255 Consider a few examples: 40 Gilmore _03 12/4 /00 1 :04 PM Page 63 Expressions, Operators, and Control Structures Table 3- 10 Bitwise Operators EXAMPLE LABEL OUTCOME

Ngày tải lên: 09/08/2014, 12:22

... Notice how calculate_cost() returns a value $total_cost = calculate_cost ($tax, $price); // round the cost to two decimal places $total_cost = round($total_cost, 2); print "Total cost: ".$total_cost; ... 123 Object-Oriented PHP data? ?s corresponding functions, better known as methods (discussed shortly) A class is a template from which speci? ?c instances of the class may be created and used in a ... These instances are also known as objects One way to grasp the relationship between classes and objects is to consider the class as a general blueprint for a structure From this blueprint, several

Ngày tải lên: 09/08/2014, 12:22

... subclasses automobile and airplane both inherit this core set of characteristics from a superclass known as vehicle. The concept of a class inheriting the charac- teristics of another class is ... ab- stract class. An abstract class is useful when a program designer wants to ensure that certain functionality is available in any subsequently derived classes based on that abstract class. ... advantages of OOP. Class Abstraction Sometimes it is useful to create a class that will never be instantiated and instead will just act as the base for a derived class. This kind of class is known as

Ngày tải lên: 09/08/2014, 12:22

... order to eliminate code redundancies. The first practi- cal use of these functions occurs in the next section, where I introduce basic tem- plate construction strategies. Building Components When ... 9-1: Incorrect usage of include() … if (some_conditional) include ('some_file'); else include ('some_other_file'); … Listing 9-2: Correct usage of include() . . . if (some_conditional) ... the include() construct must be enclosed in statement block curly brackets or in the alternative statement enclosure. Consider the difference in syntax between Listings 9-1 and 9-2. Listing 9-1:

Ngày tải lên: 09/08/2014, 12:22

... 12 /5/ 00 10: 24 AM Page 2 65 PHP? ?s Predefined MySQL Functions Once you have created and successfully tested the necessary permissions, you are ready to begin using the MySQL server. In this section, ... applies to your operating system. Configuring MySQL After a successful installation, it is time to configure the MySQL server. This pro- cess largely consists of creating new databases and configuring ... initial connection with the MySQL server. Once a successful connection is established, a database residing on that server can be selected. The syntax is: int mysql_connect([string hostname [:port]

Ngày tải lên: 09/08/2014, 12:22

... is to be stored. Of course, the most plausible choice for a storage media would be a database, since this also facilitates useful features such as searching and ordering data. I’ll use a MySQL ... these extensions to PHP s session handling is really an easy task, given PHP s capability to allow users to specify their own storage routines via a predefined... with perhaps unnecessary ... a state... assigned to be the session ID Certain session variables are created and assigned values, and then all of this information is encoded using session_encode() and inserted into a

Ngày tải lên: 09/08/2014, 12:22

... general concepts that would make it possible to begin sharing documents across operating systems and applications: • The document-processing programs must all be able to communicate using a common ... syntax and semantics, communication becomes much easier. Chapter 14 356 Gilmore_14 12 /5/ 00 10: 25 AM Page 356 • The formatting language should be speci? ?c to its purpose. The ability to custom-build ... page style from page content through the practice of applying sepa- rate style sheets to documents to satisfy speci? ?c formatting requirements. Chapter 14 358 Gilmore_14 12 /5/ 00 10: 25 AM Page 358

Ngày tải lên: 09/08/2014, 12:22

... methods such as min, max and abs, respectively • exception classes – as the CLDC classes are compatible with J2SE libraries, CLDC classes throw the same exceptions as J2SE classes; there is, therefore, ... the final application The standard classes include screen objects, which hold objects such as choice groups, lists, pop-up alerts and progress bars Forms can be created to capture user input via ... API, which can be used to access flat files and tabular data sources such as spreadsheets; it also provides cross-DBMS connectivity to a range of SQL databases 1.3.2 Personal Profile The Personal Profile

Ngày tải lên: 12/08/2014, 23:22

... access to concrete keys and pointer actions. The Canvas and Graphics objects are the basis for the low-level API classes. Typically, these applications are less portable than those developed using ... immutable user interface components, such as List or TextBox • generic objects that may contain other objects or user interface components, such as a Form; input objects such as text fields can be ... also defines how MIDlets can be packaged together in suites and share one another? ?s resources, such as graphics and data stored in the small database facility known as the RMS. Each MIDlet suite

Ngày tải lên: 12/08/2014, 23:22

... System.Data.ODBC and System.Data.SqlClient namespaces consist of classes belonging to the Odbc and Sql data providers, respectively Similar to OleDb, classes in Odbc start with Odbc, and classes ... connections • OdbcConnection creates and manages connections to ODBC data sources • OleDbConnection creates and manages connections to an OLE-DB data sources In VS NET, you can create a connection component ... Framework, each of these data providers has its own namespaces For instance, the System.Data.OleDb namespace consists of classes belonging to the OleDb data providers All of these namespace classes start...

Ngày tải lên: 22/03/2014, 18:20

... forms More advanced data structures, such as stacks and hash tables, can be found in the System.Collections namespace Classes, Structs, and Interfaces In C# , the class keyword is used to declare ... used as a base class It is primarily useful to prevent unintended derivation // error sealed class MyClass { MyClass() {} } class MyNewClass : MyClass { } - 50 - This fails because MyNewClass can’t ... can’t use MyClass as a base class because MyClass is sealed Chapter 7: Class Member Accessibility Overview ONE OF THE IMPORTANT DECISIONS to make when designing an object is how accessible to make...

Ngày tải lên: 19/01/2014, 16:20

... forms More advanced data structures, such as stacks and hash tables, can be found in the System.Collections namespace Classes, Structs, and Interfaces In C# , the class keyword is used to declare ... used as a base class It is primarily useful to prevent unintended derivation // error sealed class MyClass { MyClass() {} } class MyNewClass : MyClass { } - 50 - This fails because MyNewClass can’t ... can’t use MyClass as a base class because MyClass is sealed Chapter 7: Class Member Accessibility Overview ONE OF THE IMPORTANT DECISIONS to make when designing an object is how accessible to make...

Ngày tải lên: 24/01/2014, 09:20

... Questions Chapter Summary Programming Exercises 52 2 52 9 53 0 53 1 53 2 53 5 53 6 53 7 53 7 53 7 53 9 54 0 54 1 54 1 54 2 54 3 54 5 54 6 54 6 54 6 54 7 54 7 55 1 55 4 55 4 56 1 56 2 56 6 57 1 58 2 59 3 59 3 59 5 59 7 601 602 604 ... Represent Values in a Calendar 53 8 Formatting Styles for Date and Time 54 2 Selected Characters 55 5 Selected Character Classes 55 6 Selected Predefined Character Classes 55 7 Boundary Matchers 55 7 Selected ... Converting Decimals to Octal and Hexadecimal Numbers Representing Integers Calculating 2 s Complement Index 10 05 10 05 10 05 100 6 100 7 100 7 100 8 100 8 100 9 101 0 101 1 101 3 List of Figures 1.1 UML Notation...

Ngày tải lên: 14/02/2014, 12:20

... associating data with things (nice and vague, huh?) later 6.2 Storage Classes What is a storage class? It 's a class of storing variables You're welcome Don't get this confused with any C+ + class, ... 1 20 15 Mathematics 122 15. 1 sin(), sinf(), sinl() 124 15. 2 cos(), cosf(), cosl() 1 25 15. 3 tan(), tanf(), tanl() 126 15. 4 asin(), asinf(), asinl() 127 15. 5 acos(), acosf(), acosl() ... Passing Pointers as Parameters 28 Structures 30 8.1 Pointers to structs 31 8.2 Passing struct pointers to functions 32 Arrays 34 9.1 Passing arrays to functions...

Ngày tải lên: 16/02/2014, 08:20

... cache_set() and cache_get() (with a few variations), as well as cache_clear_all() to clear all database caches, including module-specific caches Modules can register to have their caches cleared by ... subdirectory, such as sites/all/modules/views for the Views project You can also organize modules into subdirectories; for example, you could create sites/all/modules/contrib and sites/all/modules/custom ... queries • Some Drupal database tables have permission implications (for instance, the Node module has a rich permission system for restricting access to certain content by certain users or roles)...

Ngày tải lên: 23/03/2014, 05:23

... MyNewClass can’t use MyClass as a base class because MyClass is sealed Sealed classes are useful in cases where a class isn’t designed with derivation in mind or where derivation could cause the class ... equates to allowing access to all classes that are in the same assembly as this class ■■Note  In the C+ + world, such accessibility is usually granted by the use of friends, which provides access to ... the class abstract, we have also ensured that instances of the Engineer class cannot be created 30 Chapter ■ Base Classes and Inheritance Sealed Classes and Methods Sealed classes are used to...

Ngày tải lên: 31/03/2014, 16:40

... dots at each end are needed to distinguish these special forms from the words TRUE and FALSE, which could be used as symbolic names Character Constants A character constant consists of a string ... records 4 4 .5 29 PROGRAM STRUCTURE AND LAYOUT Symbolic Names Symbolic names can be given to items such as variables, arrays, constants, functions, subroutines, and common blocks All symbolic ... this convention, these values would look like this: 0 .5 - 10. 0 100 0 .0 1.23 456 E6 1.0E-6 Double Precision Constants A double precision constant has a similar form to a real constant but it must contain...

Ngày tải lên: 24/10/2014, 20:53

... performing this kind of query: the SprocAccessor and the SqlStringAccessor You can create and execute these accessors in one operation using the ExecuteSprocAccessor and ExecuteSqlAccessor methods of ... application blocks, each aimed at managing specific crosscutting concerns In case this concept is unfamiliar, crosscutting concerns are those annoying tasks that you need to accomplish in several ... Database class, or create a new accessor directly and then call its Execute method Accessors use two other objects to manage the parameters you want to pass into the accessor (and on to the database...

Ngày tải lên: 08/03/2014, 22:20