One of the challenges developers face when writing unit tests is how to handle external dependencies. In order to run a test, you may need a connection to a fully populated database, or some remote server; or perhaps there is a need to instantiate a…

前言 What's mocking and its benefits Mocking is an integral part of unit testing. Although you can run your unit tests without use of mocking but it will drastically slow down the executing time of unit tests and also will be dependent on external reso…

Atitit  图像处理Depixelizing Pixel Art像素风格画的矢量化 在去年的时候,偶然看到hqx算法. 一个高质量的插值放大算法. 与双线性插值等插值算法相比,这个算法放大后对人眼保护相对比较好. 没有双线性插值看起来模糊,固然,也抽空把算法简单优化了一下. 常规的图像填充采样放大 "经典"的图像填充采样放大,应用线性滤波器,或导出于分析插值理论.或导出于信号处理理论.使用滤波器的实例,比如"最近邻,Bicubic和Lancosz [ Wolberg 19…

When writing tests for your application it is often desirable to avoid hitting the database.  Entity Framework allows you to achieve this by creating a context – with behavior defined by your tests – that makes use of in-memory data. This article wil…

Gerald is into Art Gerald bought two very rare paintings at the Sotheby's auction and he now wants to hang them on the wall. For that he bought a special board to attach it to the wall and place the paintings on the board. The board has shape of an a…

http://blogs.mathworks.com/loren/2007/03/01/creating-sparse-finite-element-matrices-in-matlab/ Loren on the Art of MATLAB March 1st, 2007 Creating Sparse Finite-Element Matrices in MATLAB I'm pleased to introduce Tim Davis as this week's guest blogge…

这几天在做一个项目时需要在Android中使用OSGi框架(Apache Felix),于是在一个android 4.4.2 版本系统的某品牌的平板上实验. 实验内容很简单:把felix包里的felix.jar包和一些bundles的jar包用android sdk里的dx及aapt工具转化为包含dex字节码的jar 包.这样使这些jar包能在Android上跑起来.(因为Android上使用的是在Dalvik虚拟机而不是标准的java虚拟机,所以"原生"的 jar包不能直接在Andr…

原文地址: https://github.com/ZhaoKaiQiang/AndroidDifficultAnalysis/blob/master/10.ART%E3%80%81JIT%E3%80%81AOT%E3%80%81Dalvik%E4%B9%8B%E9%97%B4%E6%9C%89%E4%BB%80%E4%B9%88%E5%85%B3%E7%B3%BB%EF%BC%9F.md ART.JIT.AOT.Dalvik之间有什么关系? JIT与Dalvik JIT是"Just In Tim…

一个优秀的单元测试 Mocking 类库,需要具备如下几个特性: 易用性:有非常明确的 API ,易于使用并易于记忆. 健壮性:行为结果始终一致,并保持准确. 帮助性:当程序出错时,给出尽可能明确的原因提示. 如果我们所使用的类库没有满足上述条件,编写测试用例的过程将变得复杂和困难,使用类库不仅没有节省时间,反而可能使我们更加迷惑.在这种条件下,我们可能更愿意删除测试用例,之前的工作也就浪费了. 在 .NET 世界中,下面是一些框架或类库的比较: 目前主流的 Mocking 类库都会支持以下主要…

与 iOS 相比,Android 的用户体验有个相对糟糕的开始.在很长的时间里,界面一直丑小鸭,卡顿也是挥不去的痛.不过,在 Google 的全力推动,以及硬件厂商的响应下,Android 还是跨越各种阻碍,逐渐壮大起来了. 在此过程中,Google 也在经历着重大的变化.它逐渐从一个只重视数据的公司,转变为一个重视设计和用户体验的公司.从 Android 4.0 开始,Android 拥有了自己的设计语言和应用设计指导.与此同时,Google 也在着手解决卡顿问题.Android 4.1 的“…