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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a regex /^([a-zA-Z0-9]+)$/ this just allows only alphanumerics but also if I insert only number(s) or only character(s) then also it accepts it. I want it to work like the field should accept only alphanumeric values but the value must contain at least both 1 character and 1 number. 回答1: Why not first apply the whole test, and then add individual tests for characters and numbers? Anyway, if you want to do it all in one regexp, use positive lookahead: /^(?=.*[0-9])(?=.*[a-zA-Z])([a-zA-Z0-9]+)$/ 回答2: This RE will do: /^(?:[0-9]+[a-z]|[a

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I would like to take a field and replace all characters that are not between a-z and A-Z with "". Is this possible, and if so, how? 回答1: You could create a CLR stored procedure to do the regular expression replacement. Here's an article on that topic: http://weblogs.sqlteam.com/jeffs/archive/2007/04/27/SQL-2005-Regular-Expression-Replace.aspx Then you could do something like this: UPDATE your_table SET col1 = dbo.RegExReplace(col1, '[^A-Za-z]',''); EDIT: Since CLR isn't an option, check out this link, there is a dbo.RegexReplace function

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have the need to check whether strings adhere to a particular ID format. The format of the ID is as follows: aBcDe-fghIj-KLmno-pQRsT-uVWxy A sequence of five blocks of five letters upper case or lower case, separated by one dash. I have the following regular expression that works: string idFormat = "[a-zA-Z]{5}[-]{1}[a-zA-Z]{5}[-]{1}[a-zA-Z]{5}[-]{1}[a-zA-Z]{5}[-]{1}[a-zA-Z]{5}"; Note that there is no trailing dash, but the all of the blocks within the ID follow the same format. Therefore, I would like to be able to represent this sequence

VIRT：virtual memory usage 虚拟内存 1、进程“需要的”虚拟内存大小，包括进程使用的库、代码、数据等 2、假如进程申请100m的内存，但实际只使用了10m，那么它会增长100m，而不是实际的使用量 RES：resident memory usage 常驻内存 1、进程当前使用的内存大小，但不包括swap out 2、包含其他进程的共享 3、如果申请100m的内存，实际使用10m，它只增长10m，与VIRT相反 4、关于库占用内存的情况，它只统计加载的库文件所占内存大小 SHR：shared memory 共享内存 1、除了自身进程的共享内存，也包括其他进程的共享内存 2、虽然进程只使用了几个共享库的函数，但它包含了整个共享库的大小 3、计算某个进程所占的物理内存大小公式：RES – SHR 4、swap out后，它将会降下来 DATA 1、数据占用的内存。如果top没有显示，按f键可以显示出来。 2、真正的该程序要求的数据空间，是真正在运行中要使用的。 top 运行中可以通过 top 的内部命令对进程的显示方式进行控制。内部命令如下： s – 改变画面更新频率 l – 关闭或开启第一部分第一行 top 信息的表示 t – 关闭或开启第一部分第二行 Tasks 和第三行 Cpus 信息的表示 m – 关闭或开启第一部分第四行 Mem 和 第五行 Swap