正如这篇讨论提到的，Should ‘using’ statements be inside or outside the namespace，在公司使用的StyleCop经常会提示，建议将 using 语句放在 namespace 内部。原本的讨论中已经讲得听清楚了，这里做个小结。举例，在代码片段 File1.cs 中，我们在 Outer.Inner 这个命名空间内声明了一个类 Foo，其中有一个静态函数 Bar() 会用到 Math 这个全局变量。// File1.cs using System; namespace Outer.Inner { class Foo { static void Bar() { double d = Math.PI; } } }加入现在有第二个代码片段 File2.cs，在 Outer 这个命名空间内声明了一个类 Math。// File2.cs namespace Outer { class Math { } }于是，在 Foo.Bar() 中，当执行到 Math 时，系统会首先到命名空间 Outer 中去寻找 Math 的定义，其次才是去命名空间外的 System 中去寻找。由于我们已经在 Outer 中定义了 Math，Foo ...继续阅读 (16)

jQuery是一个快速、流行的 JavaScript 库，jQuery用于文档处理、事件处理、动画和 Ajax 交互非常简单，学习曲线也很平坦。2016年4月的jQuery插件专辑里，我们选择一些最好的和有用的 jQuery 插件分享给大家。1. jQuery.markjQuery.mark is a jQuery plugin to highlight text with diacritics, synonyms, custom elements, custom class names, separate word search (multiple terms), filter selectors, word boundary and iframe support. Compatible with DataTable.2. Pjaxpjax is a jQuery plugin that uses ajax and pushState to deliver a fast browsing experience with real permalinks, page titles, and a working back button,pjax works by grabbing html from your server via ajax and replacing the cont ...继续阅读 (125)

CentOS 6.5 下 安装 Tengine 执行配置命令./configure 时提示以下错误：./configure: error: SSL modules require the OpenSSL library.You can either do not enable the modules, or install the OpenSSL libraryinto the system, or build the OpenSSL library statically from the sourcewith nginx by using --with-openssl=<path> option.解决方法：执行以下命令：yum -y install openssl openssl-devel执行成功之后再执行./configureConfiguration summary + using system PCRE library + using system OpenSSL library + md5: using OpenSSL library + sha1: using OpenSSL library + using system zlib library + jemalloc library is disabl ...继续阅读 (105)

文章背景：对于.NET Core大家应该并不陌生, 从它被宣布到现在已经有1-2年的时间了，其比较重要的一个版本1.0 RC2 也即将发布。.Net Core从一个一个的测试版到现在的RC2，经历了很多个大大小小的变化。特别是在RC1到RC2的更新之中，.NET Core命令行工具（dotnet cli）从 dnx 变为 dotnet，并且废除了 DNVM 和 DNU，使得 .NET Core 的开发变得更为简单，其相关工具链也基本成型。虽然网上关于.NET Core的示例项目不在少数，而且微软官方也提供了不少示例项目，但大多针对的是.NET Core的不同版本，因此很多示例项目并不是能很容易的运行起来。所以我决定写一篇针对RC2这个版本的.NET Core入门文章并提供一些能直接运行的示例项目。下载安装 .NET Core SDK从 dotnet cli github项目主页找到最新版的.Net Core SDK下载:https://github.com/dotnet/cli例如 Mac OS X的最新版的.NET Core SDK的下载地址为：https://dotnetcli.blob.core.windows.net/dotnet/beta/Installers/Latest/dotnet-dev-osx-x64.latest.pkg安装前请确认当前系统是否已经安装了老版本 ...继续阅读 (227)

0x00 概述最近提交了一些关于 docker remote api 未授权访问导致代码泄露、获取服务器root权限的漏洞，造成的影响都比较严重，比如新姿势之获取果壳全站代码和多台机器root权限新姿势之控制蜻蜓fm所有服务器新姿势之获取百度机器root权限因为之前关注这一块的人并不多，这个方法可以算是一个“新的姿势”，本文对漏洞产生的原因和利用过程进行简单的分析和说明，但因为时间和精力有限，可能会有错误，欢迎大家指出～0x01 起因先介绍一些东西～docker swarmdocker swarm是一个将docker集群变成单一虚拟的docker host工具，使用标准的Docker API，能够方便docker集群的管理和扩展，由docker官方提供，具体的大家可以看官网介绍。漏洞发现的起因是，有一位同学在使用docker swarm的时候，发现了管理的docker 节点上会开放一个TCP端口2375，绑定在0.0.0.0上，http访问会返回404 page not found，然后他研究了下，发现这是Docker Remote API，可以执行docker命令，比如访问http://host:2375/containers/json会返回服务器当前运行的 container列表，和在docker CLI上执行docker ps的效果一样，其他操作比如创建/删除containe ...继续阅读 (102)

今天使用nodejs连接mysql数据库显示 ER_ACCESS_DENIED_ERROR: Access denied for user ‘root’@‘localhost’ (using password: YES) 求大神们 ...继续阅读 (14)

An update to the Google Calendar app for Android is coming to Google Play. When you dial in to your conference call, Google Calendar can now automatically add the passcode. Simply tap the call-in number from the calendar event and you’ll be prompted to select the relevant passcode for you ─ host or participant.Note: Google Calendar detects the passcode or meeting ID from the location or notes field in the calendar event. If this information is not found, dialing in will be the same as before, where the passcode or meeting ID is dialed manually.Launch DetailsRelease track:Launching to both Rapi ...继续阅读 (31)

Education is an important field for open source software to target. Today’s generation will define the future to come, and the lessons of open source software are important to teach to professors and students, including children, teens, and young adults. There are already several different initiatives to better teach open source, including Fedora, in school. The FedoraCouncilapproved the University Involvement Initiative as an objective for the entire project in early 2014. Its goal is to increase the number of university students who use and contribute to Fedora. ...继续阅读 (10)

【摘要】有网友问及，怎样为html.EditorFor添加样式。解决方法，可以参考下面语法： 先new一个htmlAttributes。 @model Book @using Insus.NET.Models; @{ Layout = null; }阅读全文 ...继续阅读 (52)

This post can also be found onNvidia’s site.At MapD our goal is to build the world’s fastest big data analytics and visualization platform that enables lag-free interactive exploration of multi-billion row datasets. MapD supports standard SQL queries as well as a visualization API that maps OpenGL primitives onto SQL result sets.Although MapD is fast running on x86-64 CPUs, our real advantage stems from our ability to leverage the massive parallelism and memory bandwidth of GPUs. The most powerful GPU currently available is the NVIDIA Tesla K80 Accelerator, with up to 8.74 teraflops of c ...继续阅读 (24)

(This article was first published onR – Modern Data, and kindly contributed toR-bloggers)Announcing the new shiny apps gallery that showcases the use of Plotly’s R API inShiny Applications.You can visit the gallery here:https://plot.ly/r/shiny-gallery/Apps showcase the use of a variety of plotly features including:Adding interactive plotly graphs usingplotlyOutput()Embedding ggplot style visualizations usingggplotly()Accessing click, hover and zoom events usingevent_data()Need help with your shiny app? Visit our community forum athttp://community.plot.ly/You can also tweet us at@plotlygraphsWa ...继续阅读 (23)

新公司是一家数据与基础设施提供商(to B)。初来乍到，和这里的同事了解了一些云计算平台和大数据平台的技术栈。对于“新鲜”(only to me)的技术栈，自己总有一种折腾的冲动，于是就有了这一篇备忘性质的文章，记录一下自己部署devstack的步骤、遇到的问题和解决方法。和诸多国内提供公有云的厂商一样，公司的云产品也是基于成熟的OpenStack云计算平台框架和组件搭建的，并做了一些定制。长久以来，我一直以为OpenStack等都是Java技术栈的，对Java技术栈出品的东西总有一种莫名的恐惧感，现在我才发现原来OpenStack是Python系（那个汗汗汗啊）。而OpenStack的另外一个竞争对手:CloudStack才是正经八百的Java系。OpenStack是一堆云计算平台组件（诸如存储、网络、镜像管理等）的合称，十分庞大且十分复杂，入门门槛不低，即便是为开发目的而进行的OpenStack部署也会让你折腾许久，甚至始终无法搭建成功。为此OpenStack为入门者和开发者推出了一个OpenStack开发环境：devstack。通过devstack，你可以在一个主机节点上部署一个“五脏俱全”的OpenStack Cloud。一、安装devstack建议将devstack部署在物理机上，这样可以屏蔽掉许多在虚拟机上部署devstack的问题(具体不详，很多书籍都推荐这么做^_^ ...继续阅读 (294)

I’ve been waiting a little while for the new SR300 RealSense camera to show up from Intel and mine got delivered the other so I thought I’d write an initial post having played with it for around 30 minutes or so.Firstly, I thought that the camera might look like this;but it turned out to look exactly like the existing F200 developer kit that I have which looks like this;I think the first picture is a much better looking camera but but I guess it’s not really a beauty contest when it comes to depth cameras (I think the first one is the forthcoming Razr camera).Secondly, I plugged the new camera ...继续阅读 (34)

When developing an iOS app, it’s important to think about what iOS project architecture you should use. Most developers use the patternsuggested by Apple: the so-called MVC (Model-View-Controller) architecture. However, as well-established as it is, the MVC has its flaws.  For one, because of its simplicity, it leads even the most experienced engineers to put any code that doesn’t belong to a View nor to a Model in the Controller’s logic – generating huge chunks of code in the controller and really compact views and models.In this post, we’ll present VIPER, o ...继续阅读 (2)

【摘要】Linq的delegate表达式，Insus.NET觉得它封装得好，让开发时简化了很多代码，而且容易阅读与检索。 比如，我们需要计算优惠给客户金额，打85%折，可以这样写： using System; using System.Collections.Generic; using System.Li阅读全文 ...继续阅读 (88)

【摘要】今天学习，如标题。创建一个类，字段属性构造函数：Source code: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Task阅读全文 ...继续阅读 (33)

【摘要】数据源是一个DataTable，现在我们需要获取这个DataTable的第一行第一列的值。先准备一个数据集，创建一个DataTable，并填充数据： source code: using System; using System.Collections.Generic; using System.D阅读全文 ...继续阅读 (65)

1. create a send grid account2. remember the username/password of the send grid account3. install sendgrid nuget pkg4. get keymanage ->it will redirect you to manage portalcreate a new api key:4. sample code of console applicationusing System; using System.Net.Mail; using SendGrid; namespace SendGridAzureSample { class Program { static void Main(string[] args) { SendGridMessage myMessage = new SendGridMessage(); myMessage.AddTo("send_to"); myMessage.From = new MailAddress("from_email", "Display name" ...继续阅读 (110)

In 2006 I started using Facebook and most of my friends & colleagues thought I was strange. They thought it was like MySpace and why did I need a MySpace page?In 2007 I started using Twitter and most of my friends & colleagues wondered why people would care what I ate for lunch.In 2008 I started VC blogging. I had blogged when I was an entrepreneur. I went to an industry event where people actually called me self-centered for writing publicly. Ironic to be self-centered while you’re trying to offer advice to others.In 2011 I started using Instagram. To this day I mostly just find it a ...继续阅读 (38)

【摘要】今天打包新版本上传到AppStore时报错 ERROR ITMS-90034:"Missing or invalid signature.The bundle'com.xxx.xxx' at bundle path 'Payload/xxx' is not signed using an Apple阅读全文 ...继续阅读 (229)

如果自己搞不定可以找诗檀软件专业ORACLE数据库修复团队成员帮您恢复!诗檀软件专业数据库修复团队服务热线 ： 400-690-3643 备用电话： 13764045638 邮箱：service@parnassusdata.com适用于Oracle数据库 –企业版 - 9.2.0.5 版本及更高版本本文档内容适用于各个平台症状将数据库设置成备份模式，复制所有数据文件和重建控制文件，并应用几个归档日志文件让数据库比备份模式时更新一些，当尝试用alter database open resetlogs打开数据库时报下面错误：SQL> alter database open resetlogs;alter database open resetlogs*ERROR at line 1:ORA-01113: file 1 needs media recoveryORA-01110: data file 1: '/oracle/PRDDAT/DATA1/tables/PRDDAT.SYSTEM.data1.dbf'下面的查询和结果:select distinct(fhscn) from x$kcvfh;just one valueselect distinct(fhsta) from x$kcvfh;only the value of 0select distinct status f ...继续阅读 (47)

【摘要】我们先来看看效果图： 从上图中可以看出，导出的文件中列名与表格名称保持一致，并且忽略了某些字段。 相关代码实现 我们来看相关代码： 页面代码： @using (Html.BeginForm("Index", @Request.RequestContext.RouteData.GetRequiredS阅读全文 ...继续阅读 (57)

【摘要】#include #include ///都用c语言写的#include ///建议从主函数开始看#include using namespace std;int sequence_map[1000];int...阅读全文 ...继续阅读 (17)

在文章 Ruby On Rails中REST API使用示例——基于云平台+云服务打造自己的在线翻译工具 中，从Bluemix上下载的初始Hello World示例代码在本地环境下运行调试时提示：Your Ruby version is 2.2.3, but your Gemfile specified 2.2.2我本地Ruby安装的是2.2.3版本，而从Bluemix上下载的示例是2.2.2版本，所以出现此问题怎么解决呢？我的解决方法是直接修改Gemfile文件中的ruby版本号，如下图：初学ruby，不知道这是不是最佳的方法；修改完成，保存，然后执行：bundle install输出类似下面所示：C:\ruby\rbtrans>bundle install Using rake 10.4.2 Using i18n 0.7.0 Using multi_json 1.11.2 Using activesupport 3.2.22 Using builder 3.0.4 Using activemodel 3.2.22 Using erubis 2.7.0 Using journey 1.0.4 Using rack 1.4.7 Using rack-cache 1.5.1 Using rack-test 0.6.3 Using hike 1.2.3 Usi ...继续阅读 (44)

【摘要】项目中需要使用串口热敏打印机，所以研究一下串口打印。using System;using System.Linq;using System.Collections.Generic;using System.Text;using System.IO.Ports;using System.Collect...阅读全文 ...继续阅读 (25)

在现代的网页设计中，图片和内容滑块是一种极为常见和重要的元素。你可以从头开始编写自己的滑动效果，但是这将浪费很多时间，因为网络上已经有众多的优秀的jQuery滑块插件。当然，如果要从大量的jQuerySlider 中挑选出适合自己的插件也是需要一些时间的。因此这篇文章给大家挑选了10款优秀的jQuerySlider 插件，希望能帮助到你。SlidesJSSlideJS comes with CSS3 transition and you have the control of stopping and playing the slides at your will. It is very simple to manage with an easy navigation too.BxsliderDo you want your content to slide in vertically or horizontally? How about your content fades in and out? Well, this slider can manage all of that and supports content such as videos, text and images. SliceboxYou can create a three dimensional ...继续阅读 (23)

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/#include "stdafx.h"#include <msclr/marshal.h>#using <mscorlib.dll>using namespace System;using namespace System::Text;using namespace System::Runtime::InteropServices;#ifdef _MANAGED#endifvoid abc123(){    using namespace msclr::interop;    const char* msg1 = "Test String to Marshal";    const wchar_t* msg2= L"Good&n ...继续阅读 (41)

【摘要】1.自定义异常处理过滤器类文件新建MyExceptionAttribute.cs异常处理类文件MyExceptionAttribute.cs代码如下：using System;using System.Collections.Generic;using System.Linq;using Syste...阅读全文 ...继续阅读 (37)

If you think human evolution is hard to understand, you're not alone如果你认为人类的进化是很难理解的，你并不孤单The scientists who pieced it together using artifacts, such as bones, and educatedestimates, had a hard time too. Even today, when the story of our species is relatively settled, there are only a few areas of consensus where the scientific community agrees on everything科学家们拼凑在一起使用的器物，如骨骼，和受过教育的估计，很难太。即使在今天，当我们的物种的故事是相对稳定的，只有少数几个领域的共识，科学界同意一切See also:Dear Earthlings: You're screwed if you want to leave this planet参见：亲爱的地球人：你完蛋了如果你想离开这个星球参见：亲爱的地球人：你完蛋了如果你想离开这个星球六十万二千零四Luckily,Fun-Sized Scienceis here to hel ...继续阅读 (53)

Just because youcando something, doesn't mean youshould.只是因为你可以做点什么，并不意味着你应该。Here's an example: you can use Apple's new 12.9-inch iPad Pro as a camera, but you definitely shouldn't. That's not because the iPad Pro has a bad camera because the eight-megapixel iSight camera is quite good — it's just that you look ridiculous using it.下面是一个例子：你可以使用苹果的新的12.9英寸的iPad Pro为照相机，但你绝对不应该不是因为iPad Pro有一个坏的相机因为八万像素的iSight摄像头是相当好# 8212；只是你看起来可笑的使用它。See also:The 100 best iPhone apps of all time还看：100个最好的苹果手机应用程序的所有时间还看：100个最好的苹果手机应用程序的所有时间To prove the point I enlistedMashable'sJhila Farzaneh to take pict ...继续阅读 (22)