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How to debug Lock wait timeout exceeded on MySQL?
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What gives this away is the word transaction. It is evident by the statement that the query w...
Run function from the command line
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answered Oct 21 '10 at 11:52
Frédéric HamidiFrédéric Hamidi
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Why does C++ rand() seem to generate only numbers of the same order of magnitude?
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There are only 3% of numbers between 1 and 230 which are NOT between 225 and 230. So, this sounds pretty normal :)
Because 225 / 230 = 2-5 = 1/32 = 0.03125 = 3.125%
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Is gcc std::unordered_map implementation slow? If so - why?
... found the reason: it is a Problem of gcc-4.7!!
With gcc-4.7
inserts: 37728
get : 2985
With gcc-4.6
inserts: 2531
get : 1565
So std::unordered_map in gcc-4.7 is broken (or my installation, which is an installation of gcc-4.7.0 on Ubuntu - and another installation which is gcc 4.7.1 on d...
Error TF30063: You are not authorized to access … \DefaultCollection
...view (Team Foundation Service) with one of my projects with Visual Studio 2012. I'm also using an on-premises TFS server with most of my projects. When I use my on-premises TFS after using TFS preview and go back to using TFS preview, I get this error:
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How to replace four spaces with a tab in Sublime Text 2?
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Bottom right hand corner on the status bar, click Spaces: N (or Tab Width: N, where N is an inte...
Python: avoid new line with print command [duplicate]
... printed:
print("Nope, that is not a two. That is a", end="")
In Python 2.x, you can use a trailing comma:
print "this should be",
print "on the same line"
You don't need this to simply print a variable, though:
print "Nope, that is not a two. That is a", x
Note that the trailing comma stil...
Why is there huge performance hit in 2048x2048 versus 2047x2047 array multiplication?
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This probably has do with conflicts in your L2 cache.
Cache misses on matice1 are not the problem because they are accessed sequentially.
However for matice2 if a full column fits in L2 (i.e when you access matice2[0, 0], matice2[1, 0], matice2[2, 0] ... etc, nothing g...
手机当上位机：用二进制协议和设备收发数据 · App Inventor 2 中文网
...生成 App 鸿蒙 · 一套积木，多端原生打包！ 下载 AI2伴侣 · 安卓/鸿蒙/iOS aia 源码商店 中文社区 中文教育版 各版本对比 关于 关于我们 发布日志 服务条款 ...
arrayfun can be significantly slower than an explicit loop in matlab. Why?
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