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国内最美旅游景点TOP10 总有一处让你心动 - 杂谈 - 清泛网 - 专注C/C++及内核技术

...症,且还都无药可医。各位爱旅行小伙伴们,小编为你搜索了国内最美风景10个胜地,秒...长假已经走了,听说大伙居然都患上了不同程度“节后症”,且还都无药可医。各位爱旅行小伙伴们,小编为你搜索了国内最美...
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Generate random string/characters in JavaScript

...ters of hex. Option 2 If you have to do this client-side, perhaps try the uuid module - var uuid = require("uuid"); var id = uuid.v4(); // "110ec58a-a0f2-4ac4-8393-c866d813b8d1" Option 3 If you have to do this client-side and you don't have to support old browsers, you can do it without dependen...
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Generating a random & unique 8 character string using MySQL

...ting an 8-character long pseudo-random string in pure (My)SQL: SELECT LEFT(UUID(), 8); You can try the following (pseudo-code): DO SELECT LEFT(UUID(), 8) INTO @plate; INSERT INTO plates (@plate); WHILE there_is_a_unique_constraint_violation -- @plate is your newly assigned plate number S...
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top命令使用详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...q] [c] [C] [S] [s] [i] [n iter] [b] p 仅监视进程给定进程ID d 指定每两次屏幕信息刷新之间时间间隔。当然用户可以使用s交互命令来改变之。 q 该选项将使top没有任何延迟进行刷新。如果调用程序有超级用户权限,那么top将以...
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NSIS做安装程序,可接受命令行参数,实现静默安装,静默卸载 - 更多技术 ...

...令行参数,实现静默安装,静默卸载命令参数 D=xxx 可以指定安装包安装路径,覆盖安装包中设置默认路径及注册表中默认路径。但是, D= 后面一定不能有引号(不能写成...命令参数 /D=xxx 可以指定安装包安装路径,覆盖...
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记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...其它操作,从而导致雪崩效应。 为了验证这种可能,我搜索了一下MongoDB日志: shell> grep FileAllocator /path/to/log [FileAllocator] allocating new datafile ... filling with zeroes... [FileAllocator] done allocating datafile ... took ... secs 我使用文件系...
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How to suppress GCC warnings from library headers?

...gma GCC diagnostic ignored "-Wunused-but-set-variable" #include <boost/uuid/uuid.hpp> #include <boost/uuid/uuid_generators.hpp> #include <boost/uuid/uuid_io.hpp> #include <boost/lexical_cast.hpp> // turn the warnings back on #pragma GCC diagnostic pop ...
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Apache两种工作模式区别及配置切换 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...,当时httpd工作在prefork模式下。 在configure时,可以通过指定参数,将工作模式设置为worker模式或prefork模式。 使用命令:./configure –with-mpm=worker 示例:设置为worker模式 Apache服务两种工作模式详解: http://www.cnblogs.co...
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Convert varchar to uniqueidentifier in SQL Server

... DECLARE @uuid VARCHAR(50) SET @uuid = 'a89b1acd95016ae6b9c8aabb07da2010' SELECT CAST( SUBSTRING(@uuid, 1, 8) + '-' + SUBSTRING(@uuid, 9, 4) + '-' + SUBSTRING(@uuid, 13, 4) + '-' + SUBSTRING(@uuid, 17, 4) + '-' + SUBST...
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Android get free size of internal/external memory

....execute { for (storageVolume in storageVolumes) { val uuid: UUID = storageVolume.uuid?.let { UUID.fromString(it) } ?: StorageManager.UUID_DEFAULT val allocatableBytes = storageManager.getAllocatableBytes(uuid) Log.d("AppLog", "allocatableBytes:${android.t...