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Which one will execute faster, if (flag==0) or if (0==flag)?

...n :) The answer is: What is flag's type? In the case where flag actually is a user-defined type. Then it depends on which overload of operator== is selected. Of course it can seem stupid that they would not be symmetric, but it's certainly allowed, and I have seen other abuses already. If fl...
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Exotic architectures the standards committees care about

...vers offering backward compatibility for people who have not yet migrated all their Univac software. Key points: 36-bit words CHAR_BIT == 9 one's complement 72-bit non-IEEE floating point separate address space for code and data word-addressed no dedicated stack pointer Don't know if they offe...
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Turn off constraints temporarily (MS SQL)

I'm looking for a way to temporarily turn off all DB's constraints (eg table relationships). 5 Answers ...
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Generating CSV file for Excel, how to have a newline inside a value

...ixed the leading spaces issue in the question, I typed the CSV example manually and didn't copy-paste from a real file, the real file doesn't include those spaces, good catch. – Nir Aug 10 '09 at 7:41 ...
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C++读写EXCEL文件方式比较 - C/C++ - 清泛网 - 专注C/C++及内核技术

... 上有几个开源的的EXCEL库,但是完善的不多,有的是为了PHP读写EXCEL准备的,包括libXLS,XLSlib,SmartEXCEL等。我下载了几个实验了一下,在Widonws都没有编译成功。也罢了。 4.ODBC的方式 这个亲身没有尝试过,但是按照原理,应...
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我就差一个程序员了! - 杂谈 - 清泛网 - 专注C/C++及内核技术

...需要一个程序员而已。 他们需要一个人,把想法转化成 PHP、SQL、HTML、CSS、Java 和 Javascript。这些创业者只知道他们所需要的东西。所以,他们问我,能不能帮他找上一两个计算机专业的学生加入他们的项目,做这些事情? 大...
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正则表达式中 /i,/g,/m,/s,/e,/x 的含义 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...找) /s 与/m相对,单行模式匹配。 /e 可执行模式,此为PHP专有参数,例如preg_replace函数。 /x 忽略空白模式。 这些修饰符是可以混合使用的。例如 /gi(全文查找、忽略大小写) /ig(全文查找、忽略大小写)正则 表达式 含义
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笨法玩电商网站秒杀 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...可能会引起很多连锁问题:一方面可能导致内存不足,以PHP为例,一个连接通常占用10M左右,堆积一千个连接的话,10G内存就没有了;另一方面大量的连接可能耗尽端口资源,具体取决于内核参数「net.ipv4.ip_local_port_range」。此...
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jquery在线预览PDF文件,打开PDF文件 - 更多技术 - 清泛网 - 专注C/C++及内核技术

... </html> 查看预览:http://sources.ikeepstudying.com/jquery.media/pdf.php 使用jquery.media.js就可以直接把一个连接到pdf文件的链接打开,满足了需求。 项目地址:http://jquery.malsup.com/media/ jquery PDF 在线预览
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Discuz 证件类型下拉框不显示的解决方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...题的,放心使用! 找到文件 \source\admincp\admincp_members.php ,搜索代码共两处: C::t('common_member_profile_setting')->update('idcardtype', $setarr); 改为: C::t('common_member_profile_setting')->update('idcard', $setarr); 这样就OK了,以后不会再毛病了...