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The Latest

Avoid Premature Object Creation

This is a simple tip that proves useful in the long run. Consider the following example: void someFunction() {Date d= new Date(); // The Date object is created outside the

Handling Single Quotes in a SQL Query

To insert data with single quotes, place 2 single quotes instead of 1 single quote, like this: create table MyTable ( Field1 varchar(10))goinsert MyTable (Field1) select ‘A1111”1111’ UNION ALL select

Insert Multi-Lingual Characters in JDBC

This method allows you to insert multi-lingual characters into an Oracle database. In this tip, the column type is varchar2. The multi-lingual string is converted to its unicode value and

Make a ResultSet Scrollable

This code can also be used to navigate through the Resultset backward or forward, or to perform insertions, deletions and updates to update the database. //load JDBC Driver// Get the

Adding Left and Right Functionality in JavaScript

JavaScript does not offer Left and Right functions. Use the following functions to extract the left or the right part of a string. function Left(str, n){ if (n String(str).length) return

The Use of the “this” Pointer in JavaScript

This tip explains how to pass an object to a JavaScript function and retrieve the values from the “this” object. See the following piece of code: click… Run the above

ASP.NET 1st Guestbook

This guestbook shows how to use some features of ASP.NET, such as data-binding, database programming, Web Forms security, caching and the Web.Config settings. You’ll also see in action the DataGrid

FormatSize – Format a size expressed in bytes

‘ Returns a formatted string that shows the size in Bytes, KBytes or MBytes’ according to the size’ Usage:’ Dim ProperSizeString As String = FormatSize(“132100842”)’ -> returns “125.98 MB”Function FormatSize(ByVal

Managed Security: Build It Right the First Time

roviding a service on the Web entails a wealth of concerns, from system design, network architecture, and application development, to maintenance and security. This last aspect is often overlooked and

Trim the Leading and Trailing Spaces in a Given String

This functionality is not currently available in Javascript. However, tou can add this function to perform trimming in the strings. Trimming is useful in checking for empty spaces. function RTrim(str){

Use Any Image as a Background

This code allows any image to be used as a background, and scales that image to fit the browser. Just add it to the end of your HTML page:

Delete Duplicate Rows from a Table Using the Cursor

This is an advanced solution to delete duplicate Rows from a table using the cursor: create table DupTable ( Field1 varchar(20))goinsert DupTable (Field1) select ‘A11111111’ UNION ALL select ‘B22222222’ UNION

Translating errno Error Codes to Text

To translate an error code to its verbal description, use the function strerror(). strerror() is declared in as follows: char * strerror(int errcode); The function takes an error code and

The sig_atomic_t Datatype

Applications that handle signals must distinguish between atomic and non-atomic datatypes. Reading or writing an atomic object is guaranteed to take one instruction. By contrast, accessing a non-atomic object may

Obtaining a Verbal Description of errno

System calls and Standard Library functions assign a zero value to the global variable errno to indicate success. In case of an error, they assign negative values to errno. On

Defining a Template Member Function

You can define a template member function in an ordinary class as follows: class C{public: template int func(T* p);};template int C::func(T* p){ return 0;} Note that Visual C++ doesn

Duplicate the Join Function for VB4 and VB5

The native VB6 Split and Join functions have highlighted a number of useful techniques, and VB5 and VB4 programmers can use this extended facility as well. This code emulates the

Retrieve Additional File Properties

Several new properties associated with files were not available when the original VB file I/O statements and functions were designed. To easily access these new properties

Store Primary Key in ItemData

Loading a combo/listbox is pretty easy, and determining what the combo/listbox Text property selects is even easier. But if you load a table that contains duplicate values, you might run