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《提升时间的使用深度》（节选） - 杂谈 - 清泛网 - 专注C/C++及内核技术
《提升时间的使用深度》（节选）时间的快和慢也常常对应着时间的深和浅。社会学家曾发现过一个时间悖论：半个多世纪以来，人们可自由支配的闲暇时间总体上一直呈增加的趋势...时间的“快”和“慢”也常常对应着时间的...
Map a network drive to be used by a service
Suppose some Windows service uses code that wants mapped network drives and no UNC paths. How can I make the drive mapping available to the service's session when the service is started? Logging in as the service user and creating a persistent mapping will not establish the mapping in the context of...
TokuMX vs. MongoDB 性能对比 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
TokuMX vs. MongoDB 性能对比TokuDB 的ft tree 用在MongoDB产品TokuMX已经发布。MongoDB 在大量数据（比如1亿条记录）后，插入性能急剧下降。Tokutek数据带索引插入...TokuDB 的ft tree 用在MongoDB产品TokuMX已经发布。MongoDB 在大量数据（比如1亿条...
Connect different Windows User in SQL Server Management Studio (2005 or later)
... there a way in SQL Server Management Studio 2005 (or later) to change the Windows Authentication user (as you could in SQL Server 2000 and older)?
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推动“一带一路”IT产业怎么走 - 资讯 - 清泛网 - 专注C/C++及内核技术
...”倡议对其沿线国家及地区而言不仅意味着基础设施建设的提速，还有科技和文化的互联互通。如何把握机会借助“一带一路”走出去，如何在IT产业更为发达的地区站稳脚跟并抓住欠发达地区的市场，这成为目前中国IT企业必...
24种设计模式与7大原则 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...act factory pattern): 提供一个接口, 用于创建相关或依赖对象的家族, 而不需要指定具体类.生成器模式(B...创建型模式
抽象工厂模式(Abstract factory pattern): 提供一个接口, 用于创建相关或依赖对象的家族, 而不需要指定具体类.
生成...
How to identify platform/compiler from preprocessor macros?
I'm writing a cross-platform code, which should compile at linux, windows, Mac OS. On windows, I must support visual studio and mingw.
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How can I get a file's size in C? [duplicate]
....g.:
fseek(fp, 0L, SEEK_SET);
or (if seeking to go to the beginning)
rewind(fp);
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What is the difference between NULL, '\0' and 0?
...implicitly checks "is not 0", so we reverse that to mean "is 0".
The following are INVALID ways to check for a null pointer:
int mynull = 0;
<some code>
if (pointer == mynull)
To the compiler this is not a check for a null pointer, but an equality check on two variables. This might work if...
如何查看Oracle用户的SQL执行历史记录？ - 数据库(内核) - 清泛网 - 专注C/...
如何查看Oracle用户的SQL执行历史记录？select * from v$sqlarea t order by t LAST_ACTIVE_TIME desc注意 ：执行此语句等等一些相关的语句 必须具有DBA 的权限 虽然
select * from v$sqlarea t order by t.LAST_ACTIVE_TIME desc
注意 ：执行此语句等等一些相...