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std::string to char*
...ew contents, one way (given that you don't know the string size at compile-time) is dynamic allocation:
char* ca = new char[str.size()+1];
std::copy(str.begin(), str.end(), ca);
ca[str.size()] = '\0';
Don't forget to delete[] it later.
If you want a statically-allocated, limited-length array inst...
string c_str() vs. data()
I have read several places that the difference between c_str() and data() (in STL and other implementations) is that c_str() is always null terminated while data() is not.
As far as I have seen in actual implementations, they either do the same or data() calls c_str() .
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GitHub: searching through older versions of files
I know that using GitHub I can search through all the current versions of my files in a repo. However, I would also like to search through the older versions of my repo files. For example, say, I used to have a function called get_info() in my code, but deleted it several versions ago, is it possibl...
How do I remove the “extended attributes” on a file in Mac OS X?
I have an AppleScript script that runs a stress test. Part of the test is to open, save, and close certain files. Somehow, the files have picked up some "extended attributes" that prohibit the files from being saved. That causes the stress test to fail.
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How to read the content of a file to a string in C?
...is to stably capture in memory the contents of a file at a given moment in time, this solution should be avoided, unless you are certain that the file being read into memory will not be modified by other processes during the interval over which the map will be used. See this post for more informatio...
How many characters can UTF-8 encode?
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UTF-8 does not use one byte all the time, it's 1 to 4 bytes.
The first 128 characters (US-ASCII) need one byte.
The next 1,920 characters need two bytes to encode. This covers the remainder of almost all Latin alphabets, and also Greek, Cyrillic, Copti...
iOS 7's blurred overlay effect using CSS?
It seems Apple's overlay is more than just a transparency. Any ideas on how to achieve this effect with CSS and possibly JS?
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Do AJAX requests retain PHP Session info?
...de cross-domain, but only if the response type is jsonp. I do this all the time.
– Epiphany
Dec 3 '12 at 16:19
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淘宝大秒系统设计详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...经过日志统计，前端系统双11峰值有效请求约60w以上的QPS ，而后端cache的集群峰值近2000w/s、单机也近30w/s，但到真正的写时流量要小很多了，当时最高下单减库存tps是红米创造，达到1500/s。
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秒杀系统设计的第一个原则...
How do I use the lines of a file as arguments of a command?
Say, I have a file foo.txt specifying N arguments
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