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由12306.cn谈谈网站性能技术 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...页和交换内存很相似。FIFO、LRU、LFU都是比较经典的换页算法。相关内容参看Wikipeida的缓存算法。 3)缓存的重建和持久化。缓存在内存,系统总要维护,所以,缓存就会丢失,如果缓存没了,就需要重建,如果数据量很大,缓...
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Cluster analysis in R: determine the optimal number of clusters

...v18/i06/paper # http://www.stat.washington.edu/research/reports/2006/tr504.pdf # library(mclust) # Run the function to see how many clusters # it finds to be optimal, set it to search for # at least 1 model and up 20. d_clust <- Mclust(as.matrix(d), G=1:20) m.best <- dim(d_clust$z)[2] cat("mod...
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How does this site infecting script work?

... script providing the content of the iframe is made so as not to start the pdf download everytime. There may be a 1 in 10 chance or something like that. It did not try to download the pdf everytime I refreshed the joomla page. Could be even 1 in 100... who knows? – Peter Perh...
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Get MIME type from filename extension

...n/octet-stream"}, {".pcz", "application/octet-stream"}, {".pdf", "application/pdf"}, {".pfb", "application/octet-stream"}, {".pfm", "application/octet-stream"}, {".pfx", "application/x-pkcs12"}, {".pgm", "image/x-portable-graymap"}, {".pic", "i...
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ArrayBuffer to base64 encoded string

... I am trying 50mb pdf file upload using angualrjs and webapi2. I am using above line code , after upload file, the page got crashed and hanged . Below line of code ,I was used but getting null value in webapi method. "var base64String = btoa(...
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How can I export tables to Excel from a webpage [closed]

...extra lines of code and two small files included, you get export to Excel, PDF, CSV, to clipboard and to the printer. This is all the code that's required: $(document).ready( function () { $('#example').dataTable( { "sDom": 'T<"clear">lfrtip', "oTableTools": { ...
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Sending email with attachments from C#, attachments arrive as Part 1.2 in Thunderbird

...tachment = New System.Net.Mail.Attachment(Server.MapPath("~/App_Data/hello.pdf")); mail.Attachments.Add(attachment); share | improve this answer | follow | ...
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How do I convert CamelCase into human-readable names in Java?

...ss", // [My Class] "HTML", // [HTML] "PDFLoader", // [PDF Loader] "AString", // [A String] "SimpleXMLParser", // [Simple XML Parser] "GL11Version", // [GL 11 Version] "99Bottles", // [99 Bottles] ...
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Is it possible to program iPhone in C++

...in Objective-C. pierre.chachatelier.fr/programmation/fichiers/cpp-objc-en.pdf (this is an English translation of the original French) – olafure Mar 31 '12 at 17:24 ...
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“历史遗留”漏洞:浅析新型SSL/TLS漏洞FREAK - 创意 - 清泛网 - 专注C/C++及内核技术

...使用低版本SSL/TLS;而FREAK则只影响那些使用出口级RSA加密算法的版本。 安全研究人员们正在维护一个含有漏洞的网站列表,并鼓励网站管理员启用向前保密(一对一限制访问),并且禁用对出口级套件的支持,其中包括所有...