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  JavaScript: Passing by Value or by Reference

In JavaScript, we have functions and we have arguments that we pass into those functions. But how JavaScript handles what you’re passing in is not always clear. When you start getting into object-oriented development, you may find yourself perplexed over why you have access to values sometimes but not other times. When passing in a primitive type variable like a string or a number, the value is passed in by value. This means that any changes to that variable while in the function are com...

   JavaScript,Function,Pass by reference,Pa     2011-07-28 11:05:25

  Learning Server-Side JavaScript with Node.js

Node.js is all the buzz at the moment, and makes creating high performance, real-time web applications easy. It allows JavaScript to be used end to end, both on the server and on the client. This tutorial will walk you through the installation of Node and your first “Hello World” program, to building a scalable streaming Twitter server.What is Node.js?JavaScript has traditionally only run in the web browser, but recently there has been considerable interest in bringing it to the...

   JavaScript,Server side,Node.js.Implement     2011-09-20 13:33:15

  A Solution to CPU-intensive Tasks in IO Loops

Back in October 2011, Ted Dziuba infamously said that Node.js is Cancer.  A provocative title to a provocative article.  The only thing it didn’t really provoke in the commentary was much thought ;)  Zing. My interpretation of the article is that Ted holds up the classic blocking-IO process-per-request (or  thread per request; same difference) model as superior.  Yet we all remember where the blocking-IO forking model got Apache in the early days.  ...

   CPU,Intensive IO loops,Solution,C++     2012-02-06 07:42:40

  Google Nexus Event Live

Google is going to have new Nexus product release at 12 o'clock 30th September(Beijing time). This new Nexus will ship with the latest Android 6.0 Marshmallow system from Google.  Here is the live stream from YouTube. Two Nexus phones are expected to be unveiled tonight. They are from LG and Huawei respectively.. The Nexus 6P is Huawei's first Nexus device and will be available for pre-order on Tuesday in the U.S., U.K., Ireland, Canada and Japan starting at $499.99 and the devic...

   LIVE,ANDROID 6.0,NEXUS,GOOGLE     2015-09-29 10:57:04

  Will the next generation of iPhone be launched on September 10?

According to AllThingsD, Apple might launch its next generation of iPhone on September 10. There is no detailed information about this new iPhone yet, it's also unknown whether it's a cheap one or other kind of versions. But it will equip with iOS 7 and Apple may launch the next generation of Mac OS--Maverick in next few weeks. Since Apple acquired finger print recognition manufacturer AuthenTec with $356 million and it also applied the finger print unlock patent, so the next generation iPhone ...

   iPhone,iOS 7     2013-08-11 10:06:26

  How to Seem (and Be) Deep

I recently attended a discussion group whose topic, at that session, was Death.  It brought out deep emotions.  I think that of all the Silicon Valley lunches I've ever attended, this one was the most honest; people talked about the death of family, the death of friends, what they thought about their own deaths.  People really listened to each other.  I wish I knew how to reproduce those conditions reliably.I was the only transhumanist present, and I was extremely careful not...

   Deep,Work,Smart,Work style,Study     2011-10-23 11:46:11

  How to play with cross domain request

What is cross domain request In simple, cross domain request is to request resource from other domain in one domain. Note, the "other domain" doesn't just mean domain name only, it includes much more. If the protocol, domain name, port is not the same, two domains will be considered different.  Below example describes what is considered as different domain. http://www.a.com/a.jshttp://www.a.com/b.js               # Same domainhttp://www.a.com/lab/a.js &nb...

   FRONT END,JSONP,CROSS DOMAIN,CROSS ORIGIN,CORS,DOCUMENT.DOMAIN,WINDOW.NAME     2016-11-06 00:48:54

  JavaScript efficiency catch up

JavaScript is a very flexible language, we can write JavaScript code freely with various styles, different kinds of codes will have different execution efficiency. Here we summarize some tips we get from our development. Efficiency of JavaScript itself JavaScript has execution context chain, closures, prototype inheritance, eval etc. It brings us some magic features, but it also introduces the performance issue, if we don't use them properly, it will affect the codes execution efficiency. 1. Glo...

   JavaScript,efficiency,event delegation,eval     2013-04-02 04:08:46

  Capture video stream with WebRTC

WebRTC(Web Real-Time Communication) is an API supporting real time audio and video communication through a browser. It is now a recommended W3C standard. This post is to show you how to capture video stream and screenshot with WebRTC. Capture video stream To play video stream from the video camera, we first need to put a video tag in our code: <video id="video"></video> The main function to get the video stream is the navigator.getUserMedia, as of now only few of the browsers support...

   WebRTC,Video,Screenshot     2013-10-24 21:04:41

  Touching and Gesturing on iPhone, Android, and More

One of the most important parts of creating an effective and intuitive user interface on touch-enabled smartphones has nothing to do with visual appearance—instead, it has to do with creating an interface that properly responds to user input based on touch. For Web applications, this means replacing mouse events with touch events. In Dojo 1.7, new touch APIs help make this process easy. This is an updated version of the post Touching and Gesturing on the iPhone, published in 2008. I...

   Touch,Gesture,iPhone,Android     2012-04-12 11:21:42

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