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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

...改该属性为“update张三” XmlNodeList nls=xe.ChildNodes;//继续获取xe子节点的所有子节点 foreach(XmlNode xn1 in nls)//遍历 { XmlElement xe2=(XmlElement)xn1;//转换类型 if(xe2.Name=="author")//如果找到 { xe2.InnerText="...
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Socket send函数和recv函数详解以及利用select()函数来进行指定时间的阻塞 ...

...要先等待套接字的发送缓冲中的数据被协议传送完毕才能继续,如果在等待时出现网络错误,那么该Socket函数就返回 SOCKET_ERROR) 注意:在Unix系统下,如果send在等待协议传送数据时网络断开的话,调用send的进程会接收到一个SIG...
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思维导图在快速阅读或是其它学习工作中的作用 - 创意 - 清泛网 - 专注C/C++...

...智慧和技能您是不是感到力不从心? 是我们的能力不够?是我们的大脑不好使?NO!!! 您的大脑是一个沉睡的巨人,生理学家和心理学家早就告诉我们普通人大脑终其一生也只能用了5—10%的大脑潜能。我们大脑的潜能绝...
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App Inventor 2 中文网 · 项目指南

... 中文网VIP会员免费提供技术支持服务?  是的,VIP会员享免费的基础版*技术支持服务。(基础版服务内容包括文字答疑、技术方向及技术...
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浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术

... 以至于不用去思考为什么,不是有一个整型范围的公式: -2^(n-1)~2^(n-1)-1 n为整型的内存占用位数,所以int类型32位 那么就是 -(2^31)~2^31 -1 即 -2147483648~2147483647,但是为什么最小负数绝对值总比最大正数多1 ,这个问题甚至有...
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Why is there no SortedList in Java?

... Since all lists are already "sorted" by the order the items were added (FIFO ordering), you can "resort" them with another order, including the natural ordering of elements, using java.util.Collections.sort(). EDIT: Lists as data structures are based in what is interesting is the ordering in wh...
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What is the difference between Amazon SNS and Amazon SQS?

... still need to poll for messages and manage them manually. You also have FIFO SQS queues, which guarantee the delivery order of the messages. This is not a supported trigger by Lambda, thus when choosing this type of Queue, keep in mind that polling is still necessary as well as having to delete t...
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程序员之网络安全系列(二):如何安全保存用户密码及哈希算法 - 更多技术 ...

...多就999次不就打开了?那么问题来了,你的密码箱还安全? 彩虹表 除了穷举法外,由于之前的密码泄露,那么攻击者们,手上都有大量的彩虹表,比如”I love you”,生日等等,这个表保存了这些原值以及MD5后的值,那么使用...
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程序员之网络安全系列(五):数字证书以及12306的证书问题 - 更多技术 - ...

...是,就算浏览器地址栏的锁不能变绿,我们还得订票不是? 我觉得12306可能需要一个操作系统内置的认证机构来发一个证书,不然普通的用户根本不知道怎么安装证书,如果不使用https,那么安全性如何得到保证呢? 最后 ...
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What is the meaning of single and double underscore before an object name?

...ple, to make a thread-safe queue with a different queueing discipline than FIFO, one imports Queue, subclasses Queue.Queue, and overrides such methods as _get and _put; "client code" never calls those ("hook") methods, but rather the ("organizing") public methods such as put and get (this is known a...