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LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...时,LINGO都会提示为参数inflation_rate输入一个值。在WINDOWS操作系统下,将会接收到一个类似下面的对话框: 直接输入一个值再点击OK按钮,LINGO就会把输入的值指定给inflation_rate,然后继续求解模型。 除了参数之外,也可以...
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Unresolved external symbol on static class members

...le looks like: //myClass.cpp void myClass::myFunc() { myClass::m_nMyVar = 123; //I tried to use this m_nMyVar here and got link error } So I add below code on the top of myClass.cpp //myClass.cpp int myClass::m_nMyVar; //it seems redefine m_nMyVar, but it works well void myClass::myFunc() { myCl...
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SVG gradient using CSS

...4 24h168c13 0 24-11 24-24l0-47c0-13-11-24-24-24h-21v-190c0-13-11-23-24-23h-123z"></path> </svg> <svg height="0" width="0"> <defs> <linearGradient id="lgrad-p" gradientTransform="rotate(75)"><stop offset="45%" stop-color="#4169e1"><...
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VM 磁盘空间扩容引起的一些问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...拟机迁移到其他的LUN空间上 然后在存储上做扩容和收缩操作 完成操作之后 问题来了 ESX1 ESX2可以在设备中可以认到LUN 60 LUN80 容量显示正确,但不能正确识别文件格式。在ESX1的数据储存中认到LUN60 LUN80的准确容量...
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Regular expression for letters, numbers and - _

...et to show how you can use this pattern: <?php $arr = array( 'screen123.css', 'screen-new-file.css', 'screen_new.js', 'screen new file.css' ); foreach ($arr as $s) { if (preg_match('/^[\w.-]*$/', $s)) { print "$s is a match\n"; } else { print "$s is NO match!!!\n"; }; } ...
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C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术

C++使用OLE/COM高速读写EXCEL的源码VC对Excel表格的操作的方法有多种,如:通过ODBC数据库实现,通过解析Excel表格文件,通过OLE COM的实现。本文主要研究通过OLE COM实现对Excel表格的操作。另外,本文主代码中汇聚各网友的智慧进行...
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Code Golf: Collatz Conjecture

...ut by passing a number to it on the command line: ; ; >> $ ./collatz 123 ; >> 123 --> 370 --> 185 --> 556 --> 278 --> 139 --> 418 --> 209 --> 628 --> 314 ; >> --> 157 --> 472 --> 236 --> 118 --> 59 --> 178 --> 89 --> 268 --> 134...
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Convert Rows to columns using 'Pivot' in SQL Server

..., 212), (105, 2, 78), (109, 2, 97), (105, 3, 60), (102, 3, 123), (101, 3, 220), (109, 3, 87); If your values are known, then you will hard-code the query: select * from ( select store, week, xCount from yt ) src pivot ( sum(xcount) for week in ([1], [2], [3]) ) pi...
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搭建高可用mongodb集群(二)—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...

... 注意linux生产环境不能安装32位的mongodb,因为32位受限于操作系统最大2G的文件限制。 #解压下载的压缩包 tar xvzf mongodb-linux-x86_64-2.4.8.tgz 4、分别在每台机器上启动mongodb /data/mongodbtest/mongodb-linux-x86_64-2.4.8/bin/mongod...
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How to use hex color values

... How would you handle 123ABC? The compiler is burking at it not being a digit. – Islam Q. Mar 2 '16 at 6:28 1 ...