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Question: Is there a function in Informix equivalent to Oracle’s instr() that returns the position of a character within a string? Also, is there a function that counts the number

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Question: From a Windows system I am trying to connect to an Informix database running on a Sun Solarix box, which was just moved behind a firewall. The Windows machine

Question: We are using IDS 7.30 FC7 on DEC/Unix 4.2. Two separate OnLine works on the same machine. Let’s call them OnLine1 and OnLine2. While adding a new chunk (not

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Question: I want to use Mapinfo with an Informix database, but I can’t connect the database server from Mapinfo. The Informix dynamic server version is 5.0. My network protocol is

Unless explicitly declared static, an ordinary function is implicitly declared extern in C and C++. For example: extern void func(int i); // extern is redundant However, sometimes the extern qualifier

The following code has a subtle bug. Can you detect it? DWORD ErrCode = GetLastError(); // Retrieve the error codeif (!ErrCode==ERROR_FILE_NOT_FOUND) // warning on this line Although the compiler cannot

Normally, you don’t need to implement operator == for comparing string objects, as it’s already defined for you. However, for certain applications, you might need to provide a different version

When Oracle receives a SQL statement to execute, it first looks to see ifthe execution plan already exists in its cache. If the statement does existin the cache, the previous

The following code allows you to move a form by clicking anywhere on the formand dragging it: Option Explicit’define module level variables to store the last position of the form,

Counting the number of object instances of a certain class can be necessary in debugging and performance tuning. To do that, declare a static data member as a counter, and

The following will replace all single quotes in a SQL statement [CHR(39)] with anapostrophe [CHR(180)]. This is useful if you are trying to add names to adatabase as parameter values

The standard function template std::numeric_limits (defined in < limits >) returns the implementation-dependent number of digits that a certain type has: #include int main(){std::numeric_limits < float >::digits10; //6 on my

If you work with SQL Server or Oracle you at some point probably will need todetermine your unique connection identifier. For SQL Server, the connectionidentifier is called a Server Process

When granting permissions through roles, it is important to know that rolesare disabled while packages are compiled. For example, consider two schemas: User_A and User_B. Let’s create Role_A: CREATE ROLE

Question: I want to validate a form so that three radio buttons may be checked, but no more. This will be used in a “what are your top three choices”

Question: Why does Java accept function declarations like public void func(); but not declarations like public void func(void); Answer: Java is not C. Despite the similar syntax, all C idioms

Question: When loading a web page, I need to have JavaScript look at the browser it is loading into, and if it is not version 5 (Internet Explorer 5), I

Question: Can I retrieve the position of the mouse on the screen? I need to know the X and Y coordinates because I want to position a layer at that

Question: Can I create multi-dimensional arrays in JavaScript? Do you have an example? Answer: Yes and no. You can’t create multi-dimensional arrays (as such) in JavaScript. What you can do

Question: We need to create a view based on about 1600 tables. One of the problems is that we cannot enter all of the query into the buffer because the

Question: In a code I’m developing, I am getting a “can’t find project or library” error message when it gets to the following functions: Chr(), Right(), Left(). Aren’t these VB

Question: What is the SocketImpl class used for? Answer: SocketImpl is an abstract class that provides an interface for customizing socket implementations. Subclasses of SocketImpl are not intended to be

Question: What is the difference between an interface and an abstract class? Answer: Within the confines of Java syntax, an interface is a type that only defines abstract methods and

Question: Both Enterprise JavaBeans and Servlets are server side components. What are the major differences between them? Specifically, what is the difference between a Session Bean and a Servlet? Answer: