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Why is MATLAB so fast in matrix multiplication?
I am making some benchmarks with CUDA, C++, C#, Java, and using MATLAB for verification and matrix generation. When I perform matrix multiplication with MATLAB, 2048x2048 and even bigger matrices are almost instantly multiplied.
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Copy a file in a sane, safe and efficient way
... std::ios::binary);
dst << src.rdbuf();
}
This is so simple and intuitive to read it is worth the extra cost. If we were doing it a lot, better to fall back on OS calls to the file system. I am sure boost has a copy file method in its filesystem class.
There is a C method for intera...
Escape a string for a sed replace pattern
...replacement string (escapes themselves, forward slash for end of statement and & for replace all):
ESCAPED_REPLACE=$(printf '%s\n' "$REPLACE" | sed -e 's/[\/&]/\\&/g')
# Now you can use ESCAPED_REPLACE in the original sed statement
sed "s/KEYWORD/$ESCAPED_REPLACE/g"
If you ever need t...
LD_LIBRARY_PATH vs LIBRARY_PATH
I'm building a simple C++ program and I want to temporarily substitute a system supplied shared library with a more recent version of it, for development and testing.
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What is the AppDelegate for and how do I know when to use it?
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I normally avoid the design approach implied by Andrew's use of the term "heart of your application". What I mean by this is that I think you should avoid lumping too many things in a central location -- good program design normally involves separating functionality by "ar...
How do I convert NSMutableArray to NSArray?
...ons. For example sending copy to a immutable array only retains the object and returns self.
If you don't use garbage collection or ARC remember that -copy retains the object.
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Open file in a relative location in Python
...thon code is executed in not known by prior windows directory say 'main' , and wherever code is installed when it runs it needs to access to directory 'main/2091/data.txt' .
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Add a tooltip to a div
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@RayL It isn't standard behavior for a tooltip to be clickable - this blurs links and tooltips, preventing the user from knowing whether a highlighted word will 1) give them more information or 2) take them to another page entirely. In genera...
How do I discover memory usage of my application in Android?
How can I find the memory used on my Android application, programmatically?
9 Answers
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How can I test what my readme.md file will look like before committing to github?
...tepag seems to be down now. Personally I use Dillinger since it just works and saves all my documents in my browser's local database.
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