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Pages with category Development

  • Pre-Pre-Scriptum: Please, look for the edll library. It is now available as a free library for MinGW.

  • Today I bumped in another problem: I want to show my user a message saying that I'm terribly busy looking for data in the database. Because I use ODBC with QuickBooks (QODBC to be precise), the system is somewhat slow. Therefore, it can take a little while and people just can't wait and they start clicking everywhere like crazy. That's a big problem...

  • Problem

    I wrote some MS-Access code that I want to execute once a day.

  • Today I got this error which surprised me for a little while. I was pretty sure I had it before, but could not find a reference, so I decided to put it here for sure this time!

    Error: this.table.tBodies is undefined
    Source File:
    Line: 516

    Whenever I create a table in Drupal and the elements can be sorted, I like to use the drupal_add_tabledrag() feature. This function first parameter is the name of the table to drag. I was totally sure I had it right but it just kept giving me that error, over and over again

  • What a strange error!

    You execute an SQL statement with the usual OpenRecordset() function in MS-Access. So as usual, you put one parameter to the function, the SQL order.

    You have written 100 of those before and had no problems.

    Today, the last one you wrote says:

    Too few parameters. Expected 1.

    You look at this latest statement and your older statements and you just plainly don't get it. There is one parameter, it is the SQL string and it looks just fine.

    So? What's wrong?

    Simple! The error actually means a field name in the SQL statement is wrong. Yeah! That's how you need

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  • Story

    Inserting a row ina database is done with the INSERT INTO command line. This is quite standard SQL.

    MS-Access supports the INSERT INTO instruction too. You can write macros that make use of it.

    I have used it for a while and had not problems. But yesterday I discovered that there was a case when it simply wouldn't work at all. The strangest thing was that it did not work with an MS-Access database without any one error. No error at all.

  • The attached package currently includes a C function and a SIMD function that both are used to blend two images together.

    At this point I do not like the fact that the result is invalid (1 off with large values—if you have an alpha of 255, then you are likely to get the source component value minus 1). Outside of that, it works nicely and it is VERY fast.

    I can blend 3,300 NTSC images per second with my i5 (Intel(R) Core(TM) i5 CPU 760 @ 2.80GHz.) With my newer computers I can run 3,750 NTSC images per second. These have Xeon processors (Intel(R) Xeon(R) CPU E31220 @ 3.10GHz.) The ...

  • Introduction

    The Qt library version can be retrieved in all sorts of ways. There are a few I use:

    Command Line Version

    The Qt tools will display the version. One of the simplest way is to use qmake as in:

    qmake --version

    It will tell you which version of the Qt library it is using.

    When writing a configuration script, you most certainly want to make use of the pkg-config tool (at least under Linux and Cygwin):

    pkg-config --modversion QtCore

    The result is just the version of the specified module. To find all the available module look in the ...

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