Code snippets

This site provides code snippets for various languages, libraries and techniques.

The source code of the snippets is located in a GitHub Repository. This documentation is generated from commit 5139be3 in this repository. Please report issues or send pull requests, if you’ve created a snippet you’d like to see in this collection.

Available snippets

• qt4/ – Qt4 snippets
• python-misc/ – Miscellaneous Python snippets
• udev/ – UDev snippets
• Miscellaneous snippets

Refer to the snippet index for a complete list of all available snippets.

Qt4 snippets

The largest part of this collection are Qt4 snippets. These snippets show demonstrate modules and widgets from Qt4, and show various tricks and techniques to use in Qt4 applications.

These snippets are mainly Python snippets, with PySide used as binding, but you’ll find some PyQt4 or even C++ snippets, too.

Miscellaneous Python snippets

Another large part of this collection consists of miscellaneous Python snippets in python-misc/. These snippets either demonstrate specific Python modules, both standard library and 3rd party, but also some Python tricks.

Usage instructions

Most snippets can simply be executed with the corresponding interpreter. Dependencies of snippets are not documented explicitly, but obvious in most, if not all cases. If in doubt simply inspect the source code and the build system files and look for imports or includes. The build system mostly notifies about missing dependencies, in either case.

Python snippets

The collection contains snippets for both Python major versions. As with dependencies, the required interpreter version is not documented explicitly, too. Look at the source code to find out which interpreter to use. The presence of __future__ imports typically indicates Python 2 snippets, the lack thereof Python 3 snippets. The shebang often also explicitly states the major version to use.

C and C++ snippets

C and C++ snippets can be build with a standard CMake build system:

mkdir build
cd build
cmake ..
make

The build system shows status messages for each built snippet. If dependencies of a snippet are missing, the snippet is not build and a message with information about the skipped snippet and its dependencies is shown.

Snippets in sub-directories have their own, isolated CMake build system. Thus you can build each subdirectory independently. The following builds the udev snippets only, for instance:

cd udev
mkdir build
cd build
cmake ..
make