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A cron job for rails: best practices?
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edited Feb 11 '15 at 9:40
answered Jun 15 '09 at 11:40
t...
How to check whether a variable is a class or not?
...ou couldn't perform the check in the first place.
– a_guest
Dec 16 '16 at 12:42
...
Using numpy to build an array of all combinations of two arrays
...implementation:
@pv's solution
In [113]:
%timeit cartesian(([1, 2, 3], [4, 5], [6, 7]))
10000 loops, best of 3: 135 µs per loop
In [114]:
cartesian(([1, 2, 3], [4, 5], [6, 7]))
Out[114]:
array([[1, 4, 6],
[1, 4, 7],
[1, 5, 6],
[1, 5, 7],
[2, 4, 6],
[2, 4, 7],...
Colon (:) in Python list index [duplicate]
...valent to "from length of a to end"
Watch https://youtu.be/tKTZoB2Vjuk?t=41m40s at around 40:00 he starts explaining that.
Works with tuples and strings, too.
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ATL CComPtr和CComQIPtr详解 - C/C++ - 清泛网 - 专注IT技能提升
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CComPtr<IXXX> ptr;
HRESULT hr=ptr.CoCreateInstance(__uuidof(IXXX));
(4) operator *()
当对CComPtr解除指针的引用时,跟普通的指针一样,返回一个内部指针类型的引用。
(5) operator &()
获取智能指针对象的地址,实际上也是返回内部指针的地...
Visul C++中CList用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...tring str1="hello";
CString str2="world";
CString str3="my";
CString str4="life";
list.AddTail(str1);
list.AddTail(str2);
list.AddTail(str3);
list.AddTail(str4);
POSITION pos = list.GetHeadPosition();
while(pos!=NULL)
{
CString data = list.GetNext(pos);
//do something
}
这...
...VC\\INCLUDE\\iterator(93) : error C2039: “push_front”: 不是“std...
... [
_Ty=int
]
错误代码:
int ia[] = {1,5,3,3,4};
const int array_size = sizeof(ia)/sizeof(*ia);
list<int> ilist(ia,ia+array_size);
vector<int> temp;
copy(ilist.begin(),ilist.end(),
front_inserter(temp));//使用push_front插入,导致错误
解决办法: 迭代器...
PHP 错误记录和聚合的平台Sentry实战 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... 7.5 的时候,测试有循环重定向,如果你也是可以安装 7.4:
pip install sentry==7.4.3
安装完毕后,假设我们要监控 PHP 错误日志,那么通常是在我们的业务代码里嵌入官方的 PHP SDK,不过这样肯定会影响到性能,好在我们可以通过...
php 获取操作系统、浏览器版本信息(持续更新) - 更多技术 - 清泛网 - 专...
... = 'Windows 95';
}
else if (eregi('win 9x', $agent) && strpos($agent, '4.90')){
$os = 'Windows ME';
}
else if (eregi('win', $agent) && ereg('98', $agent)){
$os = 'Windows 98';
}
else if (eregi('win', $agent) && eregi('nt 5.0', $agent)){
$os = 'Windows 2000';
}
//------------...
phpcms与ucenter整合常见问题与解答 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...件
phpsso_server/api/uc_client/model/base.php
将第 74 行的
代码示例:
$this->db->connect(UC_DBHOST, UC_DBUSER, UC_DBPW, '', UC_DBCHARSET, UC_DBCONNECT, UC_DBTABLEPRE);
替换为:
代码示例:
$this->db->connect(UC_DBHOST, UC_DBUSER, UC_DBPW, UC_DBNAME, UC_DBCHAR...
