Category Archives: Languages

IE6 jQuery plugin

Recently I’ve beginning to wonder why I try to support IE6 anymore.
Vista and Window 7 do not support Multiple IEs and never will.

So I’ve just had to install XP into a virtual machine, just to test with IE6.  Upon launching IE6 for the first time, I was greated with a broken page.  This broken page just happens to be the first page IE7 users see.

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Installing Cygwin

What is Cygwin?

Cygwin is a Linux-like environment for Windows. It consists of two parts:

  • A DLL (cygwin1.dll) which acts as a Linux API emulation layer providing substantial Linux API functionality.
  • A collection of tools which provide Linux look and feel.

Why is it useful?

With Cygwin you can compile lots of Linux applications with little or no modification for use on your Windows computer.
Take advantage of Bash scripting and whole host of other useful Linux programs, like traceroute, whois, xwindow and hostx.

How can I get it?

This is the easy part. Go to the Cygwin website and download setup.exe.
The set-up process is straight forward, and there will be three decisions to make:

  • Where you want your Linux root to be installed
  • Which mirror you would like to use
  • which packages to use and you are on your way.

You will now have successfully installed Cygwin.

If you have any stories about Cgywin, feel free to post comments about them.

PHP: One Instance

Suppose you have a script in PHP that you only ever want to only ever run one instance of.

For example:

  • Maintenance script (repair,optimise)
  • Update script (crawler)
  • Server

These types of scripts need only to be launched once, and more could be counter productive or even dangerous.

The simplest way to stop multiple instances is to check to see if the last running script is still running.

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Update: Installing OpenCV with Microsoft Visual Studio 2005 C++

I have found I kept getting an error when I modified some of the example code.

The error message was:

C Run-Time Error R6034

Error Message
"An application has made an attempt to load the C runtime library incorrectly. Please contact the application’s support team for more information."

After trying a few of the suggested fixes I was starting to give up hope.

Luckly I found a post suggesting  to change the configuration from debug to retail and recompiling.

It worked!

Installing OpenCV with Microsoft Visual Studio 2005 C++

OpenCV stands for Open Computer Vision Library.

OpenCV is an open source library for computer vision development.  There are some very interesting sample applications included with this library.

This sounds like the perfect start for Sir Bones.

Before we can start we need to be able to build the library.

Requirements

Optional

We are going to be using Microsoft Visual Studio for this install.
The reasons for this include Support from OpenCV, Lots of Internet Articles for creating software, MSDN, Offical Software and its FREE.

Step 1 – Installing Visual C++ and Platform SDK

Visit http://msdn.microsoft.com/vstudio/express/visualc/usingpsdk/ and follow Microsofts Guide to setup Visual C++ and the Platform SDK.

When you get to Step 3, add this line to "Include Files" (assume default install location)
C:Program FilesMicrosoft Platform SDK for Windows Server 2003 R2Includemfc

This is because OpenCV requires some files that are inside that folder.

Step 2 – Update Visual C++ with Service Pack 1 (Optional)

Service Packs for the each of the Visual Studio products are available on one page from Microsoft.

Visual Studio 2005 Express SP1

The specific update that you will require is called "C++ 2005 Express Edition SP1 – VS80sp1-KB926748-X86-INTL.exe"

Step 3 – Install OpenCV

Go get OpenCV Library and download OpenCV 1.0 for Windows

Installation is straight forward.

Step 4 – Customising Visual C++ for use with OpenCV

We need to setup the directories for Open Visual C++

  • Open Visual C++
  • Choose menu "Tools" and select "Options"
  • In "Projects and Solutions"  and go to "VC++ Directories"
  • Show directories for "Library Files"
  • Add "C:Program FilesOpenCVlib" to the list of directories

Step 5 – Open "OpenCV Workspace .NET 2005"

In the start menu a folder called "Open CV" was created when you installed OpenCV.

Inside the folder "OpenCV" there is a shortcut called "OpenCV Workspace .NET 2005"

Open "OpenCV Workspace .NET 2005"

This will load OpenCV solution within Visual C++

There is one last thing you need to do, to be able to compile OpenCV.

  • Choose menu "Build" and Select "Configuration Manager"
  • Change "Active solution configuration" to either "Debug" or "Release"

Step 6 – Build

Now that everything is installed and setup; building OpenCV should be a breeze.

  • Choose menu "Build" and Select "Build Solution"

Building OpenCV can take anywhere from a few minutes to an hour.
When I built OpenCV it took about 10 minutes.< /p>

Congratulations OpenCV is now installed and built.

Update: Problem compiling OpenCV with Visual C++