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Why is MATLAB so fast in matrix multiplication?
...uple of times, and then:
>> tic, C = A * A; toc
Elapsed time is 0.075396 seconds.
>> tic, gC = gA * gA; toc
Elapsed time is 0.008621 seconds.
MATLAB uses highly optimized libraries for matrix multiplication which is why the plain MATLAB matrix multiplication is so fast. The gpuArray ve...
Why is a C++ Vector called a Vector?
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answered Feb 24 '09 at 11:36
Mehrdad AfshariMehrdad Afshari
379k8383 gold badges822822 silver badges775775 bronze badges
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What is the difference between self-types and trait subclasses?
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edited Dec 13 '18 at 22:42
Cory Klein
36.8k2424 gold badges158158 silver badges216216 bronze badges
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How to convert an address into a Google Maps Link (NOT MAP)
...gle.com/?q=1200 Pennsylvania Ave SE, Washington, District of Columbia, 20003
https://maps.google.com/?q=term
If you have lat-long then use below URL
https://maps.google.com/?ll=latitude,longitude
Example: maps.google.com/?ll=38.882147,-76.99017
UPDATE
As of year 2017, Google now has an offic...
String vs. StringBuilder
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236
Yes, the performance difference is significant. See the KB article "How to improve string conc...
FFmpeg: How to split video efficiently?
...fmpeg -v quiet -y -i input.ts -vcodec copy -acodec copy -ss 00:00:00 -t 00:30:00 -sn test1.mkv
time ffmpeg -v quiet -y -i input.ts -vcodec copy -acodec copy -ss 00:30:00 -t 01:00:00 -sn test2.mkv
echo "One command"
time ffmpeg -v quiet -y -i input.ts -vcodec copy -acodec copy -ss 00:00:00 -t 00:30:...
CoInitialize浅析一 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...2A2E call _CoInitializeEx@8 ; CoInitializeEx(x,x)
769B2A33 pop ebp
769B2A34 retn 4
可以看到，其中的实现还是比较简单的，它只是简单地调用了CoInitializeEx，将第二个参数设置为2，即COINIT_APARTMENTTHREADED...
Is it possible to set a custom font for entire of application?
...et2.ttf");
FontsOverride.setDefaultFont(this, "SERIF", "MyFontAsset3.ttf");
FontsOverride.setDefaultFont(this, "SANS_SERIF", "MyFontAsset4.ttf");
}
}
Or course if you are using the same font file, you can improve on this to load it just once.
However I tend to just override on...
How do you remove the title text from the Android ActionBar?
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edited May 3 '19 at 9:02
Nilesh Rathod
52.4k1313 gold badges8282 silver badges105105 bronze badges
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Mark error in form using Bootstrap
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(UPDATED with examples for Bootstrap v4, v3 and v3)
Examples of forms with validation classes for the past few major versions of Bootstrap.
Bootstrap v4
See the live version on codepen
<div class="container">
<form>
<div class="form-group r...