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泰迪熊为什么叫泰迪 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...年,还有人给他写了详细的传记,这儿有一篇传记的缩略版。`11(呐,这是我家猫打出来的字,不删,留念。)
这个向导名叫 Holt Collier,是当地传奇式的猎熊人。据说他一生猎熊超过三千头,十岁就已经猎杀了平生的第一头...
In which order should floats be added to get the most precise result?
...ere are still brick-and-mortar libraries around. Alternatively, buying the PDF online costs $5-$15 (depending on whether you're an ACM member). Lastly, DeepDyve seem to be offering to lend the paper for 24 hours for $2.99 (if you're new to DeepDyve, you might even be able to get it for free as part ...
How can I view the source code for a function?
...repository or Winston Chang's github mirror.
Uwe Ligges's R news article (PDF) (p. 43) is a good general reference of how to view the source code for .Internal and .Primitive functions. The basic steps are to first look for the function name in src/main/names.c and then search for the "C-entry" na...
服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...时间,但是有这么多状态要维护总是不好。
HTTP协议1.1版规定default行为是Keep-Alive,也就是会重用TCP连接传输多个 request/response,一个主要原因就是发现了这个问题。
也就是说HTTP的交互跟上面画的那个图是不一样的,关闭连...
Generate a heatmap in MatPlotLib using a scatter data set
...n't mean to be an idiot, but how do you actually have this output to a PNG/PDF file instead of only displaying in an interactive IPython session? I'm trying to get this as some sort of normal axes instance, where I can add a title, axis labels, etc. and then do the normal savefig() like I would do f...
surface plots in matplotlib
...linewidth=0.1)
fig.colorbar(surf, shrink=0.5, aspect=5)
plt.savefig('teste.pdf')
plt.show()
If necessary you can pass vmin and vmax to define the colorbar range, e.g.
surf = ax.plot_trisurf(x, y, z, cmap=cm.jet, linewidth=0.1, vmin=0, vmax=2000)
Bonus Section
I was wondering how to do some i...
What is the meaning of single and double underscore before an object name?
...
For more details, see the PEP-8 guide. For more magic methods, see this PDF.
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What's the difference between using “let” and “var”?
... See page 19 of ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf
– Tyler Crompton
Jun 18 '12 at 20:16
@T...
Which is faster: Stack allocation or Heap allocation
...a access."
Declare e volatile, but volatile is often compiled incorrectly (PDF).
Take the address of e inside the loop (and maybe assign it to a variable that is declared extern and defined in another file). But even in this case, the compiler may notice that -- on the stack at least -- e will alwa...
Which cryptographic hash function should I choose?
... I would say:
RIPEMD BROKEN, Should never be used as can be seen in this pdf
MD-5 BROKEN, Should never be used, can be broken in 2 minutes with a laptop
SHA-1 BROKEN, Should never be used, is broken in principal, attacks are getting better by the week
SHA-2 WEAK, Will probably be broken in the n...