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14个月前

discord.py 和 youtube_dl，“读取错误"；和“会话因某种原因已失效"

问题描述我在使用 discord.py 和 youtube_dl 时遇到了这个问题，在队列中播放 Y

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18个月前

令牌拦截器如何在 Struts 2 中工作

问题描述Struts2 提供令牌拦截器以确保每个令牌只处理一个请求，但是，我不明白它是如何工作的，如

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18个月前

Discord.js 错误提供的角色不是角色、雪花或数组或角色或雪花的集合

问题描述我正在为我的机器人创建一个静音命令，如果还没有一个静音角色，它会创建一个静音角色并将其提供给

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19个月前

.ellipsis {display: inline-block;white-space: nowr

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20个月前

500错误详情打印

error_reporting(E_ALL); function cache_shutdown_er

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20个月前

添加Cotegory 扩展类基础例子

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20个月前

python删除整个目录（目录非空）

python删除整个目录（目录非空），os.rmdir()只能删除空目录，下面的函数可以删除整个非空

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2年前

canvas 绘图时位置偏离的问题解决

使用canvas绘图时，指定的div大小一定不要超过该div所能获得的最大范围，否则绘制的点会跟实际位置发生偏离。例如untitled1</t... </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="268660"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="268660"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="268660"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="268660"></i><span>0</span></span> </li> <li> <a href="/b24b/268660.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">2年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b51b/249567.html">数据库的数据类型</a> </p> <a href="/b51b/249567.html">整数类型：int，smallint,bigint，decimal，实数类型：float，real字符串类型：char/ncharvarchar/nvarchar1.有没有var的区别：带var的叫可变长度的字符串类型，不带var的是定长字符串。定长的字段，如果存储的数据没达到最大... </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="249567"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="249567"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="249567"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="249567"></i><span>0</span></span> </li> <li> <a href="/b51b/249567.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">2年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b70b/251059.html">Python数据分析之绘图和可视化详解</a> </p> <a href="/b70b/251059.html">一、前言matplotlib是一个用于创建出版质量图表的桌面绘图包（主要是2d方面）。该项目是由johnhunter于2002年启动的，其目的是为python构建一个matlab式的绘图接口。matplotlib和ipython社区进行合作，简化了从ipythonshel... </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="251059"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="251059"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="251059"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="251059"></i><span>0</span></span> </li> <li> <a href="/b70b/251059.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">2年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b9b/259569.html">Xpath语法格式总结</a> </p> <a href="/b9b/259569.html">经常在工作中会使用到xpath的相关知识，但每次总会在一些关键的地方不记得或不太清楚，所以免不了每次总要查一些零碎的知识，感觉即很烦又浪费时间，所以对xpath归纳及总结一下。在这篇文章中你将能学习到：xpath简介xpat... </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="259569"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="259569"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="259569"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="259569"></i><span>0</span></span> </li> <li> <a href="/b9b/259569.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b127b/183161.html">云安全成解决恶意攻击爆炸式增长救命草</a> </p> <a href="/b127b/183161.html"><br/>　　关注过2010年中国云计算调查的网友应该还记得IT168对云安全概念认知的调查结果，其中，65.1%的用户认为云安全是利用云计算技术提升企业信息安全;62.9%的用户认为云安全是将安全作为一种服务提供出去，如云杀毒;54%的用户认为云安全是要解决云计算本身的安全性问题。详情请查看(http://safe.it168.com/focus/201009/cloudsec/index.html)<br/>　　分析认为，如同云计算概念一样，云安全也还没有统一的说法，对于上述三种提法，用户的认可程度基本相当，这也说明云安全要解决的问题有很多，包括云计算本身的安全、传统意义上的信息安全、安 </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="183161"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="183161"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="183161"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="183161"></i><span>0</span></span> </li> <li> <a href="/b127b/183161.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b50b/243272.html">zookeeper的优缺点</a> </p> <a href="/b50b/243272.html">Dubbo很久没有更新了.springCloud最新的2017年也有发布版本.一直更新,而且springcloud,的子项目非常多.包括了aws和总线服务,比Dubbo强很多.spring-cloud-awsspring-cloud-busspring-cloud-clispring-cloud-commonss... </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="243272"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="243272"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="243272"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="243272"></i><span>0</span></span> </li> <li> <a href="/b50b/243272.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b165b/243234.html">unity骨骼</a> </p> <a href="/b165b/243234.html">首先为了降低计算消耗，大多数情况下不会用MeshCollider，而是用多个标准几何体的组合来近似包裹住你的模型。要做随蒙皮骨骼动画而运动的碰撞器其实很简单，你在Unity里把每个骨骼模型展开，给每个部分添加近似的标准几... </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="243234"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="243234"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="243234"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="243234"></i><span>0</span></span> </li> <li> <a href="/b165b/243234.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b167b/159750.html">云视频会议系统采购集中爆发小鱼易连或成最大赢家</a> </p> <a href="/b167b/159750.html"><br/>如果将视频会议诞生视作一次沟通领域革命的话，那么云视频会议就是二次革命。当前视频会议正在经历“云化”变革。互联网、移动互联网的发展以及智能终端和云计算的普及使得视频会议拥有了更加丰富的使用场景、新的商业模式和新的市场机遇。<br/> <br/>长久以来，政府采购及金融、能源、电信等垄断行业用户一直是中国视频会议市场的主要推动力。但这些行业经过多年市场开发，已基本趋于稳定。而我国中小企业数量高达1100万家，快速沟通与提高效率也是他们的诉求。与垄断行业用户不同，中小企业由于资金资源少、专业技术人员匮乏、会议频繁程度不高，因此不可能在购买视频会议设备上大量投入。云视频具有低成本、低投入、方便快捷等优势，恰好可以满足企业，特别是中小企业的视频沟通需求。<br/>&n </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="159750"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="159750"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="159750"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="159750"></i><span>0</span></span> </li> <li> <a href="/b167b/159750.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b133b/229568.html">hibernate mysql缓存</a> </p> <a href="/b133b/229568.html">缓存是位于应用程序与物理数据源之间，用于临时存放复制数据的内存区域，目的是为了减少应用程序对物理数据源访问的次数，从而提高应用程序的运行性能.<br>　　Hibernate在查询数据时，首先到缓存中去查找，如果找到就直接使用，找不到的时候就会从物理数据源中检索，所以，把频繁使用的数据加载到缓存区后，就可以大大减少应用程序对物理数据源的访问，使得程序的运行性能明显的提升.<br><br><hr style="border: none;border-bottom:2px dashed #000"><br>　　额 </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="229568"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="229568"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="229568"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="229568"></i><span>0</span></span> </li> <li> <a href="/b133b/229568.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b120b/180304.html">大数据案例分析：电信业Hadoop应用分析</a> </p> <a href="/b120b/180304.html"><br/>　　 Hadoop伴随大数据一同火爆起来。现如今，Hadoop已经无人不知无人不晓。Hadoop从它一诞生的那天开始就与大数据深深地关联到了一起。众所周知，大数据多是出现在这些领域，包括金融、电信、保险以及一些大型互联网企业等。以电信行业为例，Hadoop在这些领域的应用情况是怎么样的呢？电信业Hadoop应用分析<br/>　　<br/> 昨日，联通研究院处长王志军在第七届“开源中国开源世界”高峰论坛上分享了Hadoop在电信行业<st </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="180304"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="180304"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="180304"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="180304"></i><span>0</span></span> </li> <li> <a href="/b120b/180304.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b167b/157768.html">全面屏杀入千元机市场海信哈利手机热销</a> </p> <a href="/b167b/157768.html"><br/>自从全面屏普及，国内已经呈现出全面屏新机百花齐放的局面。“全面屏”的热度从最初的锋芒初现发展到了现在的无人不晓。10月30日，国内知名手机厂商海信手机推出旗下首款全面屏新机——海信哈利手机，并且以1399元的亲民价格掀起了全面屏手机的普及狂潮，成为全面屏手机市场中一款炙手可热的千元旗舰机型。<br/> <br/> <br/>海信哈利手机采用的是目前很多旗舰机所采用的全面屏设计，配备的是一块5.99英寸18：9的全面屏，屏幕分辨率为1440*720，和普通的16：9的屏幕相比，可视区域面积更大，视野更开阔，同时还做到了手感与大屏兼得。<br/> <br/>为了带 </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="157768"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="157768"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="157768"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="157768"></i><span>0</span></span> </li> <li> <a href="/b167b/157768.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b10b/215912.html">怎么查看hadoop版本</a> </p> <a href="/b10b/215912.html">通过在集群上执行：hadoopversion?命令可以查看对应的hadoop的版本。<br/>查看hadoop集群的位数：<br/>执行：cd$HADOOP_HOME/lib/native<br/>file?libhadoop.so.1.0.0<br/>Hadoop属于一个能够对大量数据进行分布式处理的软件框架。Hadoop以一种可靠、高效、可伸缩的方式进行数据处理。<br/>Hadoop的发行版除了有Apachehadoop外cloudera，hortonworks，mapR，DKhadoop等都提供了自己的商业版本。<br/>商业发行版主要是提供了更为专业的技术支持，这对于大型企业更为重要，不同发行版都有自己的一些特点。<br/>扩展资料：<br/>对比版选择：DKhadoop发行版、cloudera发行版、hortonworks发行版。<br/>1、DKhadoop发行版：有效的集成了整个HADOOP生态系统的全部组件，并深度优化，重新编译为一个完整的更高性能的大数据通用计算平台，实现了各部件的有机协调。<br/>因此DKH相比开源的大数据平台，在计算性能上有了 </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="215912"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="215912"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="215912"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " dataid="215912"></i><span>0</span></span> </li> <li> <a href="/b10b/215912.html"><i></i><span>0</span></a> </li> <li> </li> </ul> </div> <div class="space"></div> </section> <section class="conts"> <section class="grid-cont"> <div class="one-title clearfix"> <div class="v-shenhe"></div> <div class="v-pub-time">3年前</div> </div> <p class="f36 conts" style="padding-top: 10px;"> <a href="/b113b/224253.html">mapreduce 读取snappy</a> </p> <a href="/b113b/224253.html">package?com.fora;<br/>import?java.io.IOException;<br/>import?java.util.StringTokenizer;<br/>import?org.apache.hadoop.conf.Configuration;<br/>import?org.apache.hadoop.fs.FSDataOutputStream;<br/>import?org.apache.hadoop.fs.FileStatus;<br/>import?org.apache.hadoop.fs.FileSystem;<br/>import?org.apache.hadoop.fs.Path;<br/>import?org.apache.hadoop.hdfs.DistributedFileSystem;<br/>import?org.apache.hadoop.hdfs.protocol.DatanodeInfo;<br/>import?org.apache.hadoop.io.IntWritable;<br/>import?org.apache.hadoop.io.Text; </a> </section> <div class="clicks" data-disable="0"> <ul> <li> <span class="support-btn js_support"><i class="support" type="1" dataid="224253"></i><span>0</span></span> </li> <li> <span class="support-btn js_support"><i class="nosupport" type="0" dataid="224253"></i><span>0</span></span> </li> <li> <span class="support-btn show-share"><i dataid="224253"></i><span>0</span></span> </li> <li> <span class="support-btn js_collect"><i class="t-collect " 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