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C++中智能指针的设计和使用 - C/C++ - 清泛网 - 专注C/C++及内核技术

...减少左操作数所指对象的引用计数(如果引用计数为减至0,则删除对象),并增加右操作数所指对象的引用计数;调用析构函数时,构造函数减少引用计数(如果引用计数减至0,则删除基础对象)。 智能指针就是模拟指针...
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Bulk Insertion in Laravel using eloquent ORM

...ulk insert. Because of the poor implementation, this function will prepare and execute the same query once per Item. – Paul Spiegel Apr 19 '17 at 8:47 ...
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Single Page Application: advantages and disadvantages [closed]

I've read about SPA and it advantages. I find most of them unconvincing. There are 3 advantages that arouse my doubts. 11 A...
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What does the Java assert keyword do, and when should it be used?

What are some real life examples to understand the key role of assertions? 18 Answers ...
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C++11 tuple 这一篇就够了 - C/C++ - 清泛网 - 专注C/C++及内核技术

...e> #include <functional> int main() { auto t1 = std::make_tuple(10, "Test", 3.14); std::cout << "The value of t1 is " << "(" << std::get<0>(t1) << ", " << std::get<1>(t1) << ", " << std::get<2>(t1) << ")\n"; int n = 1; auto t2 = std::make_tupl...
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LVN_ITEMCHANGED通知会响应多次的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术

...(三次)的问题及替代方案。 #define LVIF_STATE 0x0008 #define LVIS_FOCUSED 0x0001 #define LVIS_SELECTED 0x0002 // 在CListCtrl派生类中响应LVN_ITEMCHANGED消息 void CNewListCtrl::OnItemchanged(NMHDR* pNMHDR, LRESULT* pResult) { NMLISTVIE...
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C/C++获取Windows的CPU、内存、硬盘使用率 - C/C++ - 清泛网 - 专注C/C++及内核技术

...设置为nonsignaled while (true) { WaitForSingleObject(hEvent, 1000); res = GetSystemTimes(&idleTime, &kernelTime, &userTime); __int64 idle = CompareFileTime(preidleTime, idleTime); __int64 kernel = CompareFileTime(prekernelTime, kernelTime); __int64 user = CompareFileTime(pr...
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bat 写注册表详解 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

...MULTI_SZ 数据字符串中用作分隔符的字符。如果忽略则将 "\0" 用作分隔符 /d 要分配给添加的注册表 ValueName 的数据 /f 不用提示就强行改写现有注册表项 例如: REG ADD \\ABC\HKLM\Software\MyCo 添加远程机器 ABC 上的一个注册表项 HKLM...
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php:获取数组第一个值 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...HP 5.4版本后可以使用[ ]来取数据指定位置的元素,索引从0开始,即$arr[0]取数组第一个值。不过为了兼容性,建议还是采取reset(),current(),next()等函数来取数组中的值,reset($arr)后current($arr)取第一个值。自PHP 5.4版本后可以使用 [ ] ...
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还原MongoDB中Decimal类型数据 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...转换为Double类型存储。 但是,取出来的数据(原数据为0.12345)可能是类似0.1234499999999的形式,ToString("f4")转化string值为0.1234,正确值应为0.1235。 解决方法: 先还原Double类型后值为0.12345,再做四舍五入。 private static string D...