step 1: Draw a PCB shape and the main component placed in the PCB. The drawing sheet should be in the top view. If the drawing sheet is a 3D file, you should transfer it to 2D file as following. You can generate more than one 2D files from different…

http://docs.oracle.com/javase/tutorial/essential/concurrency/index.html Concurrency Computer users take it for granted that their systems can do more than one thing at a time. They assume that they can continue to work in a word processor, while othe…

我修,我修,修修修. New Major Features in 14.1 What's New in VCL Products 14.1 Breaking Changes To learn about breaking changes in this version, please refer to the following page: Breaking Changes in 14.1.3 (VCL Product Line) Known Issues To learn about know…

前段时间在design+code购买了一个学习iOS设计和编码在线课程,使用Sketch设计App,然后使用Swift语言实现Designer News客户端.作者Meng To已经开源到Github:MengTo/DesignerNewsApp · GitHub.虽然实现整个Designer News客户端基本功能,但是采用臃肿MVC(Model-View-Controller)架构,不易于代码的测试和复用,于是使用ReactiveCocoa实现MVVM(Model-View-View Mod…

本来是要继续由浅入深表达式系列最后一篇的,但是最近团队突然就忙起来了,从来没有过的忙!不过喜欢表达式的朋友请放心,已经在写了:) 在工作当中发现大家对Javascript的一些基本原理普遍存在这里或者那里的一知半解,所以决定先花一些时间整理一下这些基础知识和大家分享. 后面会附上培训用的PPT.刚开始是打算写一篇的,但是后来写着写着就发现越来越多,所以决定还是写一个系列吧.本系列所有内容都是涉及Javascript基础的,没有时髦的玩意儿,但是我相信这些基础的东西会有助于你理解那些有趣的东西的.…

> Should I use a AntiFreeze component on every form I have a TIdTCPClient > component?  Or is one enough to handle the whole Application? One is enough. According to the Indy help file, -------- Only one TIdAntiFreeze can be active in an application…

Concurrent Random Numbers In JDK 7, java.util.concurrent includes a convenience class, ThreadLocalRandom, for applications that expect to use random numbers from multiple threads or ForkJoinTasks. For concurrent access, using ThreadLocalRandom instea…

Chapter1 Introduction That is the art and talent involved in programming—reducing complexity to simplicity. A “bad programmer” is just somebody who fails to reduce the complexity. So, a “good programmer” should do everything in his power to make what…

在编写和维护公司的现有代码的时候,我经常思考的问题是:怎样的系统算一个好的系统?如何设计具有扩展.可维护.复用的系统,它能最大限度的应对产品经理不断变化的需求.答案似乎是:设计模式. Remember , knowing concepts like abstraction, inheritance, and polymorphism do not make you a good object oriented designer. A design guru thinks about how to…

http://www.embedded.com/design/embedded/4231326/Taking-advantage-of-the-Cortex-M3-s-pre-emptive-context-switches The ARM Cortex-M3 (CM3) architecture is a 32-bit microcontroller core designed to replace many 8-bit and 16-bit devices by offering faste…