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Hashing a string with Sha256

...a); SHA256Managed hashString = new SHA256Managed(); string hex = ""; var hashValue = hashString.ComputeHash(message); foreach (byte x in hashValue) { hex += String.Format("{0:x2}", x); } return hex; } ...
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What is the purpose of base 64 encoding and why it used in HTTP Basic Authentication?

...s stream is too exaggerated. It is better to compare it to storing data in hex format. Because hex would only make x2 more bytes than original stream, and 1s,0s - makes x8 times more bytes. (And Base64 makes x1.3 more data than original byte array). So sometimes it is acceptable to encode binary str...
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“大数据”做P2P 风控靠谱吗 - 资讯 - 清泛网 - 专注C/C++及内核技术

“大数据”做P2P 风控靠谱吗P2P平台傍上“大数据”听着美美的,然而事实上绝大多数的P2P平台并没有大数据资源和分析能力,所谓的风控很可能是天方夜谭。而相对来说,线上、线下相结合的风控模式安全性更高一些。P2P平台...
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搭建高可用mongodb集群(四)—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...本集》搭建后还有两个问题没有解决:从节点每个上面的数据都是对数据库全量拷贝, 按照上一节中《搭建高可用mongodb集群(三)—— 深入副本集》搭建后还有两个问题没有解决: 从节点每个上面的数据都是对数据库全量...
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What's the difference between EscapeUriString and EscapeDataString?

...+c%2B%2B *)The encoded data string is actually "happy%20c%2B%2B"; %20 is hex for the space character, and %2B is hex for the plus character. If you're using UriBuilder as you should be, then you'll only need EscapeDataString to properly escape some of the components of your entire URI. @Livven's ...
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java中的缓存技术该如何实现 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...,浏览器请求应用服务器,应用服务器做一堆计算后再请求数据库,数据库收到请求后再作一堆计算后把数据 返回给应用服务器,应用服务器再作一堆计算后把数据返回给浏览器.这个是一个标准流程.但是随着互连网的普及,上网的人...
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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

...的,网游和QQ在线或是登录时访问的更多的是用户自己的数据,而订票系统访问的是中心的票量数据,这是不一样的。不要觉得网游或是QQ能行你就以为这是一样的。网游和QQ 的后端负载相对于电子商务的系统还是简单。 其...
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数据:保护隐私比信息挖掘重要 - 资讯 - 清泛网 - 专注C/C++及内核技术

数据:保护隐私比信息挖掘重要现在人人都在说大数据,各行各业都开始重视大数据的收集和挖掘。不过,你了解大数据吗?你想过大数据可能给日常生活带来的安全隐患吗?大数据...现在人人都在说大数据,各行各业都开始重...
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搭建高可用mongodb集群(一)——配置mongodb - 大数据 & AI - 清泛网 - 专...

搭建高可用mongodb集群(一)——配置mongodb在大数据的时代,传统的关系型数据库要能更高的服务必须要解决高并发读写、海量数据高效存储、高可扩展性和高可用性这些难题。不过就是因为 在大数据的时代,传统的关系型数...
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How to calculate a Mod b in Casio fx-991ES calculator

... doesn't already exist). But the easiest method I find is to convert it to hexadecimal which then converts to binary instantly (i.e. Dec 10 = Hex A = Binary 1010). There are relatively simple methodologies to go between even very very big (or very very small!) exponential decimal values to hex, goog...