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Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
I am doing some numerical optimization on a scientific application. One thing I noticed is that GCC will optimize the call pow(a,2) by compiling it into a*a , but the call pow(a,6) is not optimized and will actually call the library function pow , which greatly slows down the performance. (In ...
Passing an integer by reference in Python
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It doesn't quite work that way in Python. Python passes references to objects. Inside your function you have an object -- You're free to mutate that object (if possible). However, integers are immutable. One workaround is to pas...
How to write a scalable Tcp/Ip based server
I am in the design phase of writing a new Windows Service application that accepts TCP/IP connections for long running connections (i.e. this is not like HTTP where there are many short connections, but rather a client connects and stays connected for hours or days or even weeks).
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How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?
...or 3.5, PEP 478, and it has now made its way into What's New in Python 3.5 document.
However, since many organizations are still on Python 2, you may wish to do this in a backwards compatible way. The classically Pythonic way, available in Python 2 and Python 3.0-3.4, is to do this as a two-step pro...
TypeScript function overloading
...ompiled to JavaScript, their signature is totally identical. As JavaScript doesn't have types, we end up creating two functions taking same number of arguments. So, TypeScript restricts us from creating such functions.
TypeScript supports overloading based on number of parameters, but the steps to ...
git pull error :error: remote ref is at but expected
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If you are running git under a file system that is not case sensitive (Windows or OS X) this will occur if there are two branches with the same name but different capitalisation, e.g. user_model_changes and User_model_changes as both of the remote branches will match the same tracking ref.
Delete ...
UILabel sizeToFit doesn't work with autolayout ios6
...an't get it to work. Either I make the box too small for long text and it doesn't grow, or I make it too big and it doesn't shrink.
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How do you open an SDF file (SQL Server Compact Edition)? [closed]
...d I would like to retrieve its schema and query it with some UI. How can I do this? I have no Visual Studio installed on the machine and I would like to install as little software as possible.
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Where does Visual Studio look for C++ header files?
...ve a MSVC in my job PC from the previous user, but I am use GNU/Linux, and don't wanted to launch VC just to satisfy my curiosity to look at Microsoft®'s headers. Btw, about what the kind of curiosity I had: I found that the MSDN didn't even knows it's own header names! I.e. they referred to Iphlpa...
How to disable scrolling temporarily?
... know if it is somehow possible to temporarily disable scrolling on the window element through Javascript? The reason I'd like to disable scrolling is that when you scroll while scrollTo is animating, it gets really ugly ;)
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