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What is the lifetime of a static variable in a C++ function?
...and can be problematic as Roddy mentions.
[1] C++98 section 3.6.3.1 [basic.start.term]
[2] In C++11 statics are initialized in a thread safe way, this is also known as Magic Statics.
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How to schedule a task to run when shutting down windows
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WARINING: The group policy startup and shutdown scipts not executed, when using fastboot (enabled by default in windows 8 and up). In this case, only the restart or force shutdown (from command prompt) shut down really the computer. In all other cases ...
How does one write code that best utilizes the CPU cache to improve performance?
...ance, after a few misses to subsequent cache lines, the hw prefetcher will start fetching cache lines into the cache, anticipating the application's needs. If you have a regular access pattern, the hardware prefetcher is usually doing a very good job. And if your program doesn't display regular acce...
RegEx for matching UK Postcodes
...egular expression. It may not be exactly what you want but would be a good starting point. The RegEx differs from the XML slightly, as a P character in third position in format A9A 9AA is allowed by the definition given.
The RegEx supplied by the UK Government was:
([Gg][Ii][Rr] 0[Aa]{2})|((([A-Za...
How can I view an old version of a file with Git?
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If you like GUIs, you can use gitk:
start gitk with:
gitk /path/to/file
Choose the revision in the top part of the screen, e.g. by description or date. By default, the lower part of the screen shows the diff for that revision, (corresponding to the "patch" ra...
Django: ImproperlyConfigured: The SECRET_KEY setting must not be empty
...ed binary (.pyc) file. After deleting all such files in my project, server started running again. :)
So if you get this error, out of nowhere, i.e without making any change seemingly-related to django-settings, this could be a good first measure.
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What's the most efficient way to test two integer ranges for overlap?
... There are more cases than depicted in your pictures. E.g., what if w2 starts before w1 and ends after w1?
– WilliamKF
Aug 19 '14 at 3:34
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vim - How to delete a large block of text without counting the lines?
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Go to the starting line and type ma (mark "a"). Then go to the last line and enter d'a (delete to mark "a").
That will delete all lines from the current to the marked one (inclusive). It's also compatible with vi as well as vim, on th...
How to overload functions in javascript?
... article.
Here's one example from that article:
function selectEntries({ start=0, end=-1, step=1 } = {}) {
···
};
This creates default properties and values for the start, end and step properties on an object passed to the selectEntries() function.
Default values for function arguments
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gdb fails with “Unable to find Mach task port for process-id” error
...e where you overwrite some config/binaries that your computer relies on to start up and operate normally.
– shaunhusain
Feb 12 '18 at 21:05
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