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https://www.tsingfun.com/it/tech/1055.html 

Nginx缓存解决方案:SRCache - 更多技术 - 清泛网 - 专注C/C++及内核技术

...比较复杂的时候,比如说缓存键的动态计算等,就不得不一点代码了,此时Lua模块是最佳选择。 闲言碎语不多讲,表一表Nginx配置文件长啥样: lua_shared_dict phoenix_status 100m; lua_package_path '/path/to/phoenix/include/?.lua;/path/to/phoen...
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What is the difference between sigaction and signal?

... Excellent sigaction() demo from GCC themselves: gnu.org/software/libc/manual/html_node/…; and excellent signal() demo from GCC themselves: gnu.org/software/libc/manual/html_node/…. Notice that in the signal demo they avoi...
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Keep only date part when using pandas.to_datetime

.... pd.to_datetime(df['Date'], utc=False) You will be able to save it in excel without getting the error "ValueError: Excel does not support datetimes with timezones. Please ensure that datetimes are timezone unaware before writing to Excel." ...
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技术人员如何创业《四》- 打造超强执行力团队 - 资讯 - 清泛网 - 专注C/C++...

...术型领导更加容易这样。与其去管理团队还不如多花时间几个函数来的实际。授权就是教人做事的方法,充分信任他能做好,并且知道和鼓励他不要怕错。授权后并不是不管了,还需要去跟踪进度保证他们执行到位。 建立积...
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Using .NET, how can you find the mime type of a file based on the file signature not the extension

...}, {"xhtml", "application/xhtml+xml"}, {"xls", "application/vnd.ms-excel"}, {"xml", "application/xml"}, {"xpm", "image/x-xpixmap"}, {"xsl", "application/xml"}, {"xlsx","application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"}, {"xltx","a...
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C#操作XML小结 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...23" value="321"/> </aaa> 如果我要找到123然后取到321应该怎么呢? using System.XML; XmlDataDocument xmlDoc = new System.Xml.XmlDataDocument(); xmlDoc.Load(@"c:/Config.xml"); XmlElement elem = xmlDoc.GetElementById("add"); string str = elem.Attributes["value"].Value 第三...
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从源代码剖析Mahout推荐引擎 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...就清楚地知道了Mahout推荐引擎的原理和使用,我们就可以一个自己的构造器,通过“策略模式”实现,算法的组合。 新建文件:org.conan.mymahout.recommendation.job.RecommendFactory.java public final class RecommendFactory { ... } 1). 构造数据...
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C++并发编程(中文版) - 文档下载 - 清泛网 - 专注C/C++及内核技术

... 137 6.3 设计更为复杂的基于锁的数据结构… 148 6.3.1 编一个使用锁的线程安全查找表… 148 6.3.2 编一个使用锁的线程安全链表… 153 6.4 小结… 157 第7章 设计无锁的并发数据结构… 159 7.1 定义和结果… 159 7.1.1 无阻塞数据...
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C++ Lock-free Hazard Pointer(冒险指针) - C/C++ - 清泛网 - 专注C/C++及内核技术

.../ 可拓展 / 阻塞场景可用 性能依赖 TLS 性能敏感 / 读多少 C++ 标准库中提供了锁和引用计数方案。锁的缺点很明显,无论是哪种锁,在读的时候都会产生较大的开销。引用计数则相对好一些,但每次读取都需要修改引...
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How to show multiline text in a table cell

...rap our content works fine, but due to the use of this table (exporting to excel), large #s of columns and rows balloon the size of the exported file and cause excel to crash upon reading the file. (odd, I know). Has anyone else seen this or have an idea for a solution? – JoeBr...