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  Prototypes and Object Orientation

David Chisnall takes a look at the two dominant paradigms in object-oriented languages (classes and prototypes) and discusses the strengths and weaknesses of each.Two terms are quite often confused when describing programming languages:class-based and object-oriented:Simula was the first class-based language. It provided classes (actually implemented using closures) as a means of encapsulating abstract data types.Smalltalk was the first object-oriented language. It provided a...

   Prototype,OOP,Differential,Comparison,Mo     2011-09-02 11:51:26

  Install Open webOS on Linux

HP has just released its first beta version of the webOS, It is said the user experience of webOS is quite impressive, so I immediately had it installed on my PC. There are two versions of Beta release,one embedded version and one Ubuntu version. I briefly share my installation experience of webOS in Linux. In the official document, it says "By 'Linux' we mean 'Ubuntu Linux'", it doesn't support server version and 64 bit version of Ubuntu. Here I use Mint 13. 1. Clone source code from github Add...

   Linux,webOS,Ubuntu,embedded,HP     2012-09-10 19:36:30

  Cracking Siri

On October 14, 2011, Apple introduced the new iPhone 4S. One of its major new features was Siri, a personal assistant application. Siri uses a natural language processing technology to interact with the user.Interestingly, Apple explained that Siri works by sending data to a remote server (that’s probably why Siri only works over 3G or WiFi). As soon as we could put our hands on the new iPhone 4S, we decided to have a sneak peek at how it really works.Today, we managed to crack ...

   Siri,Cracking,Defect,Speech to text,Record,AI     2011-11-15 08:38:23

  A simple example of drawing bar chart with label using d3.js

D3.js is a very popular graph library to help developers draw various kind of charts using JavaScript in a webpage. It utilizes the SVG format supported by all major modern browsers and can help developers get rid of the old age of Flash or server side graph drawing libraries. In this post, we will introduce some simple examples of drawing bar chart with labels using D3.js.  First, let's see what will be the final look of the graph drawn. Below is the complete source code for this example....

   JAVASCIPT,D3,BAR CHART,LABEL,TUTORIAL     2020-05-16 23:25:40

  Stop Making Apps

There are a bunch of iPhone apps I own though I have no clue what they do. These apps include but aren’t limited to; FLUD, Apptitude, Cartoonatic, Can’t Wait!, Punch, Pah, Prize Claw, Traveler, Concur, Jajah, Fast Customer, Pimple Popper and many more whose names I can’t even remember.Occupying my valuable homescreen real estate are also a bunch of apps whose purpose I remember only because they were built by people I know or am friends with, but that I sadly never use. And ...

   App,Apple,Android,Stop     2011-11-12 10:54:42

  Wow: Intel unveils 1 teraflop chip with 50-plus cores

I thought the prospect of quad-core tablet computers was exciting.Then I saw Intel's latest -- a 1 teraflop chip, with more than 50 cores, that Intel unveiled today, running it on a test machine at the SC11 supercomputing conference in Seattle.That means my kids may take a teraflop laptop to college -- if their grades don't suffer too much having access to 50-core video game consoles.It wasn't that long ago that Intel was boasting about the first supercomputer with sustained 1 teraflop performan...

   Intel,Chip,Multi-core,teraflop     2011-11-16 08:15:39

  How does JGSS read Windows native TGT credential?

MS LSA is a protected subsystem that authenticates and logs users onto the local system. The user credential is stored at the native credential cache of LSA on Windows. This kind of credential is often used to authenticate the user to the server, one of the authentication methods is Kerberos. JGSS has provided a native interface which can read the native TGT credential and use it to get the TGS of a service. But how does JGSS read the native TGT credential? Here is a sample code for reading nati...

   KERBEROS,JGSS,MS LSA,NATIVE CREDENTIAL,TGT,SESSION KEY TYPE     2015-03-25 03:42:32

  Introducing Google JS Test

Google JS Test is a JavaScript unit testing framework that runs on the V8 JavaScript Engine, the same open source project that is responsible for Google Chrome’s super-fast JS execution speed. Google JS Test is used internally by several Google projects, and we’re pleased to announce that it has been released as an open source project.Features of Google JS Test include:Extremely fast startup and execution time, without needing to run a browser.Clean, readable output in th...

   Google,JavaScript,Test tool,Open source     2011-10-07 23:35:48

  How to create a language in one day

About a year ago I worked on a very interesting project which involved creating a unique world with all its history, people, physics, metaphysics and so forth. I like fictional worlds that are thoroughly created and I have always marveled at people like Tolkien or Richard Garriot who go such great lengths and even create languages for their worlds. I have since many years felt that it would be awesome to create my own language and I’m probably not alone in feeling that.When I started stud...

   Language,Develop,Short period,Programming language     2011-10-19 14:15:24

  One thought about JavaScript exception handle

Due to network, browser and cache issues, the JS executed in production may produce different results from the testing environments. Sometimes they may produce exceptions. Front-end developers may encounter this kind of exceptions frequently. But how to log and use them is seldomly considered by them. Actually, exception handling includes two steps : log and use. 1. Log Regarding to log error, this is relatively convenient, since in each browser, there is one interface called window.onerror. win...

   JaavScript,Log,Exception,Email     2013-03-18 12:50:21

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