ruby a programmer s best friend

... the admin password for a database located at http://www.alternetwebdesign.com/cgi-bin/directimi/database.cgi?admin.cfg This database contained sensitive client data of this particular company ... Extensions HTML Administration Forms, a set of Web pages that allow you to administer the FrontPage Server Extensions remotely.[3] Well, that s what Microsoft s manual has to say about it This means, ... protect these pages by using htacces This mistake allows whomever to change the webpages on the server and thus defacing the site, uploading files and thus possible gaining full access to the server...

Ngày tải lên: 18/10/2014, 19:16

... goal for system designers is make these copy operations run as fast as possible Because of physical laws, larger storage devices are slower than smaller storage devices And faster devices are more ... is identified by a unique number, known as its address, and the set of all possible addresses is known as the virtual address space As indicated by its name, this virtual address space is just ... Stallman The result was a family of standards, known as the Posix standards, that cover such issues as the C language interface for Unix system calls, shell programs and utilities, threads, and...

Ngày tải lên: 04/09/2013, 22:05

... such as queues, arrays, stacks, and hash tables Database access classes IO classes WinForms classes, for creating user interfaces Network classes Outside the base class runtime, there are many ... class MyNewClass : MyClass { } - 50 - This fails because MyNewClass can’t use MyClass as a base class because MyClass is sealed Chapter 7: Class Member Accessibility Overview ONE OF THE IMPORTANT ... techniques Sealed Classes Sealed classes are used to prevent a class from being used as a base class It is primarily useful to prevent unintended derivation // error sealed class MyClass { MyClass()...

Ngày tải lên: 10/12/2013, 16:15

... the assembly has a manifest that contains the metadata for the assembly, such as the classes, types, and references contained in the IL The assembly often contains one or more classes, just like ... methods in public classes must be CLS types • The parameters of methods that are accessible to subclasses must be CLS types These rules talk a lot about definitions and parameters for public classes ... Classes have a number of possible characteristics that can be set, and that are stored in the metadata In addition, members can have characteristics These characteristics include such items as...

Ngày tải lên: 10/12/2013, 16:15

... such as queues, arrays, stacks, and hash tables Database access classes IO classes WinForms classes, for creating user interfaces Network classes Outside the base class runtime, there are many ... class MyNewClass : MyClass { } - 50 - This fails because MyNewClass can’t use MyClass as a base class because MyClass is sealed Chapter 7: Class Member Accessibility Overview ONE OF THE IMPORTANT ... techniques Sealed Classes Sealed classes are used to prevent a class from being used as a base class It is primarily useful to prevent unintended derivation // error sealed class MyClass { MyClass()...

Ngày tải lên: 19/01/2014, 16:20

... is identified by a unique number, known as its address, and the set of all possible addresses is known as the virtual address space As indicated by its name, this virtual address space is just ... dubbed “Posix” by Richard Stallman The result was a family of standards, known as the Posix standards, that cover such issues as the C language interface for Unix system calls, shell programs and utilities, ... invoking a special function known as a system call that pass control to the operating system The operating system saves the shell s context, creates a new hello process and its context, and then passes...

Ngày tải lên: 19/01/2014, 18:20

... goal for system designers is make these copy operations run as fast as possible Because of physical laws, larger storage devices are slower than smaller storage devices And faster devices are more ... bytes in a word (the word size) is a fundamental system parameter that varies across systems For example, Intel Pentium systems have a word size of bytes, while serverclass systems such as Intel ... situations C pointers are a common source of confusion and programming errors C also lacks explicit support for useful abstractions such as classes and objects Newer languages such as C++ and Java...

Ngày tải lên: 19/01/2014, 18:20

... such as queues, arrays, stacks, and hash tables Database access classes IO classes WinForms classes, for creating user interfaces Network classes Outside the base class runtime, there are many ... class MyNewClass : MyClass { } - 50 - This fails because MyNewClass can’t use MyClass as a base class because MyClass is sealed Chapter 7: Class Member Accessibility Overview ONE OF THE IMPORTANT ... techniques Sealed Classes Sealed classes are used to prevent a class from being used as a base class It is primarily useful to prevent unintended derivation // error sealed class MyClass { MyClass()...

Ngày tải lên: 24/01/2014, 09:20

... Using an Array Anonymous Arrays Multidimensional Arrays Review Questions Parameter Passing Passing Primitive Data Values Passing Reference Values Passing Arrays Array Elements as Actual Parameters ... (Local Classes) 8.10 Instantiating Local Classes 8.11 Objects of Local Classes as Caches 8.12 Defining Anonymous Classes 8.13 Accessing Declarations in Enclosing Context (Anonymous Classes) 9.1 ... 1.1 Basic Elements of a Class Declaration //Source Filename: CharStack.java public class CharStack { // Class name // Class Declarations: CHAPTER 1: BASICS OF JAVA PROGRAMMING // Fields: private...

Ngày tải lên: 14/02/2014, 12:20

... private System.Data.SqlClient.SqlDataAdapter sqlDataAdapter1; private System.Data.SqlClient.SqlCommand sqlSelectCommand1; private System.Data.SqlClient.SqlCommand sqlInsertCommand1; private System.Data.SqlClient.SqlCommand ... namespaces For instance, the System.Data.OleDb namespace consists of classes belonging to the OleDb data providers All of these namespace classes start with OleDb The System.Data.ODBC and System.Data.SqlClient ... private System.Windows.Forms.DataGrid dataGrid1; private System.Data.SqlClient.SqlDataAdapter sqlDataAdapter1; private System.Data.SqlClient.SqlCommand sqlSelectCommand1; private System.Data.SqlClient.SqlCommand...

Ngày tải lên: 22/03/2014, 18:20

... the assembly has a manifest that contains the metadata for the assembly, such as the classes, types, and references contained in the IL The assembly often contains one or more classes, just like ... methods in public classes must be CLS types • The parameters of methods that are accessible to subclasses must be CLS types These rules talk a lot about definitions and parameters for public classes ... Classes have a number of possible characteristics that can be set, and that are stored in the metadata In addition, members can have characteristics These characteristics include such items as...

Ngày tải lên: 24/03/2014, 04:20

... initial caps McGraw-Hill eBooks are available at special quantity discounts to use as premiums and sales promotions, or for use in corporate training programs For more information, please contact ... software-only beta This is good news for developers because it gives us a rare advance look at a future system and a chance to begin developing applications that will run as soon as the hardware ... you can spend more time creating incredible applications NOTE Eclipse is also available for Mac and Linux Having greater availability, on numerous operating systems, means that almost anyone can...

Ngày tải lên: 31/03/2014, 16:37

... PM Page 33 Variables and Data Types String Values A string is a group of characters that are represented as a single entity but can also be examined on a character-by-character basis Some examples ... create a basic script Chapter 2, “Variables and Data Types,” describes the various data formats supported by PHP and how variables are named and used to store information Chapter 3, “Expressions, ... This is normal make Install the Apache server After you type make install, another bunch of messages will scroll by Again, this is normal Once this has finished, you’ll see a message stating that...

Ngày tải lên: 27/06/2014, 08:20

... create a basic script Chapter 2, “Variables and Data Types,” describes the various data formats supported by PHP and how variables are named and used to store information Chapter 3, “Expressions, ... display, and manipulate user input Chapter 11, “Databases,” highlights PHP s vast support for database servers, focusing on the MySQL database to show how PHP can act as an efficient interface ... This is normal make Install the Apache server After you type make install, another bunch of messages will scroll by Again, this is normal Once this has finished, you’ll see a message stating that...

Ngày tải lên: 09/08/2014, 12:22

... PM Page 33 Variables and Data Types String Values A string is a group of characters that are represented as a single entity but can also be examined on a character-by-character basis Some examples ... Operators The assignment operators assign a data value to a variable The simplest form of assignment operator just assigns some value, while others (known as shortcut assignment operators) perform ... another way to assign values to the $meat array is as follows: $meat[] = "chicken"; $meat[] = "steak"; $meat[] = "turkey"; Single-Dimension Associative Arrays Associative arrays are particularly...

Ngày tải lên: 09/08/2014, 12:22

... known as methods (discussed shortly) A class is a template from which specific instances of the class may be created and used in a program These instances are also known as objects One way to grasp ... values appearing in the array Its syntax is: array array_count_values (array array); The returned array will use the values as keys and their corresponding frequencies as the values, as illustrated ... $languages = array("Spanish", "English", "French", "Russian"); $a_ language = array_shift($languages); // $a_ language = "Spanish"; // $languages = array("English", "French", "Russian"); array_unshift()...

Ngày tải lên: 09/08/2014, 12:22

... 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 an abstract class An abstract ... Page 136 Chapter get_class_vars() The get_class_vars() function returns an array of attributes defined in the class specified by class_name Its syntax is: array get_class_vars (string class_name) ... get_class_methods() function returns an array of methods defined by the class specified by class_name The syntax is: array get_class_methods (string class_name) A simple example of how get_class_methods()...

Ngày tải lên: 09/08/2014, 12:22

... convenience several predefined character ranges, also known as character classes, are available Character classes specify an entire range of characters, for example, the alphabet or an integer set: [[:alpha:]] ... Expressions Of course, case-sensitive characters are an issue only when the pattern is alphabetical For all other characters, spliti() operates exactly as split() does sql_regcase() The sql_regcase() ... can with Perl regexps is use various metacharacters to search for matches A metacharacter is simply an alphabetical character preceded by a backslash that acts to give the combination a special...

Ngày tải lên: 09/08/2014, 12:22

... constructs that the database uses to store the data • Data querying: SQL can retrieve data in the database and present it in an easily readable format • Data manipulation: SQL can insert, update, ... fields, in this case name and email address, is not empty and verifies that the supplied email address is valid If any of the data checks out as invalid, the appropriate error messages are displayed, ... relational database is essentially a database implementation where all data is organized into related table structures It is possible to create tables that “relate” to one another through the use...

Ngày tải lên: 09/08/2014, 12:22

... functions to access certain databases that have based their own API on the already existing ODBC API These database servers are listed in below: • Adabas D • IODBC • IBM DB2 • Solid • Sybase SQL Anywhere ... display an appropriate message and exit process It s possible to simultaneously have several databases open for querying Perform necessary queries on selected database (s) Once the querying is ... is advantageous in the sense that should you choose to use any other ODBC database (or other database listed above), you already have the necessary scripts at your disposal NOTE PHP s ODBC support...

Ngày tải lên: 09/08/2014, 12:22