In many cases you may need the canonical (or absolute) name of a file, for example when you need to compare two relative file names (relative to the current directory

Servlets often need to display a lot of HTML. One way to do this is with println() commands and String concatenation. However, String concatenation is an expensive process. It is

There are times when almost every programmer comes up with a class that consists only of public static methods. Usually these are some kind of utility classes, which do not

There is a constructor in the java.io.FileOutputStream class which can be used to append data to an existing file. Usage:public FileOutputStream(String name, boolean append) throwsFileNotFoundExceptionwhere:name – the file nameappend –

To access a file that is kept in the same directory as the servlet, you can do either of the following things:1. Hard-coding the file path: FileReader fr = new

‘ API declaration’Private Declare Function GetForegroundWindow Lib

Unregister Mswcrun.dll version 6.00.8450 by running the following command from the run dialog box: regsvr32.exe /u

Create a VB standard exe project and paste the following code in your form’s code window: Option ExplicitPrivate Declare Function ShellExecute Lib

Here’s a very short bit of code that will make a StatusBar hide or show, accordingly: public void viewStatusBar() { /* Hide or show the statusbar */ StatusBarPane().setVisible(!(StatusBarPane().isVisible()));} Just have

Objects frequently contain member objects that need to be exposed.Often, these are not correctly encapsulated, which could lead to problems that are difficult to track down.Consider a Circus object, which

Start a new VB project. Add a form (or use the default one). Then, add these four buttons on the form: create (cmdCreateFile), read (cmdRead), append (cmdAppend), and delete (cmdDelete).

Most coding standards recommend the use of Hungarian variable naming, which uses prefixes to indicate the variable’s type. However, these naming conventions usually should not be used in a component’s

This tip is useful if you do Outlook automation with user created Outlook folders. These folders cannot be accessed by the GetDefaultFolder method usually employed in automation techniques. This snippet

The VBIDE object model doesn’t offer any native property or method to determine whether the IDE is in design-time mode, run-time mode, or debug (break) mode. However, it’s easy to

If from an ASP page you try to use Response.Redirect after having written anything to the browser, you’ll get an error saying that the page’s headers have already been written.

The DoEvent statement should be used only to give other portions of your program to be reactive to the end user’s actions. Instead, many VB developers use it to force

The RmDir command can delete a directory only if it doesn’t contain files or sub-directories. If the directory you want to delete does contain other files or, worse, subdirectories it

Consider the usual way of swapping two strings: Dim s1 As String, s2 As StringDim tmp As String’ initialize the strings s1 = String$(1000, “-“)s2 = String$(1500, “+”)’ do the

Suppose you want to store the movements of a chess game in a file so that when the program terminates, the users can resume it later from the same point.

Often, it is helpful to find the current classpath. This can be done from within a Java program by using the following code: System.out.println(System.getProperty(

The term thunk dates back to the days of the antediluvian Algol programming language and has stuck since then. A thunk is an invisible and parameter-less function or procedure that

Dynamic linking — either in the form of shared libraries in Unix or Windows DLLs — is not defined by standard C++. However, this is a widely used feature among

A typical way in which constants or global variables are defined in Java is to define a class so it stores all the constant variables which are marked as

It is sometimes necessary to get the exception’s stack trace as String (for logging, reporting, etc.). Unfortunately, the Exception class itself provides only the getMessage() method which does not include

The concept of a variable argument list is rather common: void f(const char *format,

It is often helpful to provide a

There is a very simple way to get around the compile error when passing UDT (user-defined type) in procedure between forms. Just declare the procedure as Friend instead of Public.Example: