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M_PI works with math.h but not with cmath in Visual Studio

...) and suddenly it compile perfectly. Try moving it higher up the page. Totally unsure as to why this would cause issues though. Edit: Figured it out. The #include <math.h> occurs within cmath's header guards. This means that something higher up the list of #includes is including cmath with...
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How does _gaq.push(['_trackPageLoadTime']) work?

...precated and its functionality has been set as a default setting. (Functionally speaking, it has gone from being an opt-in feature to being an opt-out feature.) _setSiteSpeedSampleRate is the new function for setting the sample rate on this feature; its default value is 1 (as in 1%). To opt out of ...
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How to add facebook share button on my website?

... You don't need all that code. All you need are the following lines: <a href="https://www.facebook.com/sharer/sharer.php?u=example.org" target="_blank"> Share on Facebook </a> Documentation can be found at https://developers...
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How to make URL/Phone-clickable UILabel?

...TextView.editable = NO; yourTextView.dataDetectorTypes = UIDataDetectorTypeAll; Swift: yourTextView.editable = false; yourTextView.dataDetectorTypes = UIDataDetectorTypes.All; This will detect links automatically. See the documentation for details. ...
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Is errno thread-safe?

...t errno; so my question is, is it safe to check errno value after some calls or use perror() in multi-threaded code. Is this a thread safe variable? If not, then whats the alternative ? ...
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What does the caret operator (^) in Python do?

...his way: 1000 # 8 (binary) 0011 # 3 (binary) ---- # APPLY XOR ('vertically') 1011 # result = 11 (binary) share | improve this answer | follow | ...
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How to limit the amount of concurrent async I/O operations?

... Stephen Toub, but the less announced news is that the async semaphore actually made it into the Beta release of .NET 4.5 If you look at our beloved SemaphoreSlim class (which you should be using since it's more performant than the original Semaphore), it now boasts the WaitAsync(...) series of ove...
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How to obtain the number of CPUs/cores in Linux from the command line?

... Note that both of these will end up counting twice as many cores as actually exist if you're on a system with hyperthreading (e.g, P4, or Core i7). – duskwuff -inactive- Jun 26 '11 at 0:04 ...
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How to loop through all the properties of a class?

...). You don't need to specify BindingFlags.GetProperty, you use that when calling type.InvokeMember() to get the value of a property. share | improve this answer | follow ...
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Express-js can't GET my static files, why?

... In case of new install you should verify that your express module is properly installed (expressjs.com/en/starter/installing.html) then you should check the path and your directory name like Giacomo said ;) – Spl2nky ...