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Linux下部署企业级邮件服务器(postfix + dovecot + extmail) - 开源 & Gith...
...显示。
关于GB18030 ：由thunderbird或某些客户端软件发出的中文邮件编码是GB18030，部分内容甚至全部乱码。经过仔细检查发现是Perl 目前版本（5.8.8或以下）缺少了GB18030码表，因此增加了Encode::HanExtra码表模块的支持，解决了此问...
What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
...ction_name
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1208r5.pdf went into C++20, so we have yet another way to do it.
The documentation says:
constexpr const char* function_name() const noexcept;
6 Returns: If this object represents a position in the body of a function,
returns an im...
How does one write code that best utilizes the CPU cache to improve performance?
...ted in how memory and software interact. It's also available as a 104-page PDF.
Sections especially relevant to this question might be Part 2 (CPU caches) and Part 5 (What programmers can do - cache optimization).
share
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Why can templates only be implemented in the header file?
...an't afford export", it's listed on his blog (gotw.ca/publications) but no pdf there (a quick google should turn it up though)
– Pieter
Jan 30 '09 at 15:22
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Finding all possible combinations of numbers to reach a given sum
...ins and mathematical model of it at http://jaqm.ro/issues/volume-5,issue-2/pdfs/patterson_harmel.pdf (or Google coin change problem).
By the way, the Scala solution by Tsagadai, is interesting. This example produces either 1 or 0. As a side effect, it lists on the console all possible solutions. It...
Generating an MD5 checksum of a file
...used this solution but it uncorrectly gave the same hash for two different pdf files. The solution was to open the files by specifing binary mode, that is: [(fname, hashlib.md5(open(fname, 'rb').read()).hexdigest()) for fname in fnamelst] This is more related to the open function than md5 but I th...
Is Fortran easier to optimize than C for heavy calculations?
...e-functions-in-cc and open-std.org/jtc1/sc22/wg21/docs/papers/2015/p0078r0.pdf as well.
– Jeff
Dec 23 '16 at 0:51
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What is the difference between a URI, a URL and a URN?
...u could also identify the text as file://hostname/sharename/RomeoAndJuliet.pdf.
That would also be a URI, but more specifically a URL because it locates the text.
*Uniform Resource Name
(Note that my example is adapted from Wikipedia)
...
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...
BLE（一）概述&工作流程&常见问题 - 创客硬件开发 - 清泛IT社区，...
...，即Bluetooth，是斯堪的纳维亚语中 Blåtand / Blåtann 的英化版本。该词是十世纪的一位国王Harald Bluetooth的绰号，相传他将纷争不断的丹麦部落统一为一个王国，并引入了基督教。蓝牙技术开发者Jim Kardach于1997年提出用Bluetooth这个...