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How to convert string to char array in C++?
...implest way I can think of doing it is:
string temp = "cat";
char tab2[1024];
strcpy(tab2, temp.c_str());
For safety, you might prefer:
string temp = "cat";
char tab2[1024];
strncpy(tab2, temp.c_str(), sizeof(tab2));
tab2[sizeof(tab2) - 1] = 0;
or could be in this fashion:
string temp = "cat"...
How to convert a factor to integer\numeric without loss of information?
...
734
See the Warning section of ?factor:
In particular, as.numeric applied to
a factor is meani...
Is it smart to replace boost::thread and boost::mutex with c++11 equivalents?
...locking. The analogous std::shared_timed_mutex is available only since C++14 (N3891), while std::shared_mutex is available only since C++17 (N4508).
C++11 timeouts are different to Boost timeouts (though this should soon change now Boost.Chrono has been accepted).
Some of the names are different (e....
简单谈谈软件配置管理 - 项目管理 - 清泛网 - 专注C/C++及内核技术
...者知道变了什么？为什么变？变化前后的状态是什么？
4、配置审计
IEEE中的定义：确认产品的完整性并维护构件间的一致性，即确保产品是一个严格定义的构件集合。
可以理解为：验证软件产品的构造是否符合需求、标准、...
How to get the position of a character in Python?
...
L S
2,55933 gold badges2727 silver badges4141 bronze badges
answered Feb 19 '10 at 6:35
Eli BenderskyEli Bendersky
218k...
How do I sort one vector based on values of another
...
answered Oct 14 '09 at 21:47
Ian FellowsIan Fellows
16k1010 gold badges4444 silver badges6363 bronze badges
...
What characters are valid for JavaScript variable names?
...$A-Z\_a-z\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\...
An efficient way to transpose a file in Bash
...];
}
print str
}
}' file
output
$ more file
0 1 2
3 4 5
6 7 8
9 10 11
$ ./shell.sh
0 3 6 9
1 4 7 10
2 5 8 11
Performance against Perl solution by Jonathan on a 10000 lines file
$ head -5 file
1 0 1 2
2 3 4 5
3 6 7 8
4 9 10 11
1 0 1 2
$ wc -l < file
10000
$ time perl ...
Mysql - How to quit/exit from stored procedure
...
piotrmpiotrm
10.6k44 gold badges2626 silver badges2727 bronze badges
...
What tools are there for functional programming in C?
...
40
FFCALL lets you build closures in C -- callback = alloc_callback(&function, data) returns a...