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Throw an error in a MySQL trigger

Throw an error in a MySQL trigger

If I have a trigger before the update on a table, how can I throw an error that prevents the update on that table?…


c# - How do I print an HTML document from a web service?

I want to print HTML from a C# web service. The web browser control is overkill, and does not function well in a service environment, nor does it function well on a system with very tight security con…


Generate list of all possible permutations of a string

How would I go about generating a list of all possible permutations of a string between x and y characters in length, containing a variable list of characters. Any language would work, but it should b…


How can I dynamically center an image in a MS Reporting Services report?

Out of the box, in MS Reporting Services, the image element does not allow for the centering of the image itself, when the dimensions are unknown at design time. In other words, the image(if smaller…


c# - Print a Winform/visual element

All the articles I've found via google are either obsolete or contradict one another. What's the easiest way to print a form or, say, a richtextbox in c#? I think it's using the PrintDiaglog class by…



Python, Unicode, and the Windows console

When I try to print a Unicode string in a Windows console, I get a UnicodeEncodeError: 'charmap' codec can't encode character.... error. I assume this is because the Windows console does not accept Un…


How to show a GUI message box from a bash script in linux?

I'm writing a few little bash scripts under Ubuntu linux. I want to be able to run them from the GUI without needing a terminal window to enter any input or view any output. So far the only input requ…


PDF Editing in PHP?

Does anyone know of a good method for editing PDFs in PHP? Preferably open-source/zero-license cost methods.:) I am thinking along the lines of opening a PDF file, replacing text in the PDF and then w…


Pretty printing XML files on Emacs

I use emacs to edit my xml files(nxml-mode) and the files were generated by machine don't have any pretty formatting of the tags. I have searched for pretty printing the entire file with indentation a…


How to create a C++ Boost undirected graph and traverse it in depth first search(DFS) order?

How to create a C++ Boost undirected graph and traverse it in depth first search(DFS) order?…




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