Dynamic allocation of an exception (as in this example) is not a good idea: class Err{public: Err(const char * description);};void f(){ if (disaster) throw new Err(“failed”); //exception object is dynamically

You can apply STL generic algorithms to a sequence of elements. They are defined in the header file . (on pre-standardized implementations, the name is used instead). Iterators are used

Even macros that look harmless can have detrimental effects. For example: #define twice(x) ((x)+(x)) The macro, twice, is well parenthesized and performs a simple addition operation. Despite its simplicity, there

STL is divided into two major categories: containers and algorithms. Additional components are iterators, function objects, numeric facilities, allocators, and miscellaneous utilities. STL containers are defined in eight different header

As opposed to what most people believe, portability does not guarantee that you can compile and run the same code on every platform without any modifications. Although it is sometimes

Use this code for a generic routine to load a grid from a SQL statement. The example is for Remote Data Objects (RDO) and Sheridan Software Systems’ grid, but it

With VB4 or higher, you can place invisible controls-such as the standard Timer and CommonDialog or UserControls built with VB5 that have their InvisibleAtRuntime property set-directly on an MDIForm. In

When using proper names, you sometimes need to capitalize the first letter of each word. For example, you need to convert “john smith” into “John Smith.” With VB3, you had

I always put the word DAO in front of all references to DAO objects. Here are some examples: Dim Db As DAO.DataBaseDim rs As DAO.Recordset This way, VBA knows what

Question: I have 20 user licenses. During some activities, users are being logged in two or three times. Thus I can hit a max user limit with only 9 actual

Question: I am interested in learning SQL on my own and need to know if there are any tutorials or disks that I can obtain so that I can practice

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Question: I want to find out the top 5%, 10%, and 30% customers based on their purchases. For example, my table looks like:CustomerID Purchase(in $)1 1002 500Up to 100 customers.

Question: I’m still quite new to using SQL and I am designing a database in which I am cataloging resources owned by my company. I am attempting to create a

Question: In SQL Server 6.5, what is the meaning of ‘Error States’? I get this message in a stored procedure.What are these states 1-27. Answer: These numbers provide the context,

Question: How do you select all entries that contain a certain substring? Is there a function like InStr() in VB? Answer: Yes, Check out the charindex function which will Return

Question: After the line break in the code below, the blankspace between the quotes is not recognized. I am merely trying to indent the second line, but I get nothing.

Question: I have fields, in which the datatype is TEXT, and I need to know how I can insert and update data from these fields? Answer: If the size of

Question: I have developed an application that processes about 40,000 records every time it runs. I am using ADO 2.1 and each record is returning about 100 columns of data,

Question: What is the syntax for doing a cascade delete in SQL? For instance, I have a table with a parent record that has child records in other tables, filtering

Question: In all the Foxpro 5.0 documentation, I can’t find an example on how to update the contents of a field ofa table based on another table. For example, table

Question: When I run a stored procedure which uses cursors to do a selection of counts based on a view, it returns the correct (expected) numbers. However, when I rerun

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Question: Where can I find miscellaneous information about SQL on the web? If you know of anyuseful websites with history, general structure, etc…, of SQL, please let me know. Answer:

Question: Currently, I use SQL Mail in SQL Server 7.0 with Outlook and Exchange Server. I am sure there were no errors during set up, but when I went to

Question: I’m looking for other tools for importing ASCII files to SQL server 7.0 without problems. At this moment I’m missing data and the tools can’t take care of it

Question: I am using SQL+ through COBOL to include a 250 char notes field on a report. If the user has entered a return character in the field (Hex 0A),

Question: We are always getting “stored procedure not found” error messages. We know it is on the server and we can access the db. Any clues? Answer: Well, if you

Question: I’ve got a table structure that looks like the following:Customer TableCUST_IDNAMECODE_LISTCode TableCUST_IDCODE The code table can have any number of codes for each customer. I’m trying to find a