SEARCH KEYWORD -- Code Jam 2013

  Javascript motion tracking

It is very often that I have to do video motion tracking for interactive video campaign in my daily work. If I’m used used to do that in Flash, I made a quick experiment to do the same in javascript. Thanks to Olof Storm who made me a perfect corner pin motion tracking in After Effects, and I’ve been using some code from Steven Wittens to draw an image in perspective. Click here to see the motion tracking demo (give it a bit of time to fully load). What I’m doing in this dem...

   JavaScript,Motion tracking,Flash     2012-03-20 07:43:46

  Memory related exception analysis in Java

Java Virtual Machine Specification divides the memory of JVM into several areas : Heap, Stack, The Program Counter register and Method area etc. In HotSpot JVM, heap is composed of Young, Tenured and Perm. There are different OutOfMemory error can happen in different memory area. Next is an overview of some of these OOM errors. StackOverflowError The JVM will allow only a specified number of stacks created nested. An JVM option -Xss can be set to determine the maximum stack size. If the num...

   Java, Memory model, Memory exception, OOM     2015-01-19 06:54:27

  Diving Deeper into HTML5 Offline Browsing

Recently, I published an article on one of the new features in HTML 5 called Offline Browsing  in HTML5 with ApplicationCache.The response to that article was good, and I was asked to expand on some further points including:how to decide on what files to cachethe implications of caching those filesdebugging the ApplicationCacheSo, that’s where this article will start: where the last one finished.  If you haven’t, you should probably read the previous article before this o...

   HTML5,Offline browsing,New breakthrough,Feature     2011-12-20 08:46:06

  4 asynchronous programming methods in JavaScript

You may know the execution environment of JavaScript is single threaded. The so called single thread means only one task can be running at any time, if there are many tasks, they need to be in a queue and wait for the previous task to be completed. The advantage of this mode is it's easy to implement and the execution environment is relative simple; the disadvantage is that if one task takes long time, the tasks following it must wait in the queue and this will delay other tasks consequently. Th...

   JAVASCRIPT,ASYNCHRONOUS PROGRAMMING, EVENT MODEL,PROMISE     2012-12-25 00:55:47

  Publish Your Go Package on pkg.go.dev

go.dev is a site where various resources for Go developers are shared, such as “Get Started”, Tutorial, Packages (pkg.go.dev), and all the official blogs. Among them, Packages is where I visit most, which allows free access to all the open-source Go packages submitted by communities including the native Golang packages. Thanks to all the contributors, I enjoy the great benefit, and sometimes I want to be a contributor myself. Let’s submit a “complete” package t...

   GO.DEV,PUBLISH PACKAGE,GOLANG     2022-06-12 00:31:20

  Why you don’t need a programmer

Once or twice a month I get the question from an aspiring entrepreneur that’s been pushing their idea forward in hopes to (very soon) create a company out of what they’ve been working so hard on.  They’ve spent countless hours working through all the details of what this new product will do, who they’re going to partner with and what they’re going to charge for it. They may even be on the Lean Startup bandwagon and actually talked with potential custo...

   Programmer,Necessary,No need     2012-03-30 07:37:39

  Significance and use of do{...}while(0)

In some Linux kernel and other open source codes, we can see some codes like below: do{ ... }while(0) This code snippet is not a loop, it seems there is no significance of using do...while this way, then why should we use it? In fact, the significance of do{...}while(0) is better than optimizing your code. After some research, we summarize some benefits of it. 1. Help define complex macro to avoid error #define DOSOMETHING()\ foo1();\ foo2(); The me...

   do{...}while(0), optimization     2012-10-21 21:13:22

  What Level Programmer Are You?

Everybody's talking about how programming is the skill that we all are going to need. [Except those folks who might feel that most programming could be turned into wizard-like tools. Insert long discussion about Strong AI.] But what's a programmer? Is the guy who set up his own Apache Web Server a programmer? How about the guy who created a complex Excel spreadsheet? The guy who made his own RPG level? Minecraft players? When we say "Everybody is going to have to know programming" what, e...

   Programmer,Skill,Level,Criteria     2012-02-08 10:07:41

  JavaScript delete specific item from array

Deleting an item from an array is easy using JavaScript’s built-in method splice(). However, if you are somewhat new to scripting, simply knowing about splice does not help you remove a certain item from an array. This article will solidly state the solution to this dilemma.If you want to remove a specific item from your array, you will simply use a basic loop and a conditional check with the splice()method.Here is a breakdown of what we will do in 3 easy steps, so tha...

   JavaScript,Array,Remove item,Splice,Dele     2011-09-16 16:38:52

  Resolve SystemStackError issue when resolving IP address in Ruby

In Ruby, Resolv is the default DNS resolution implementation. It can be used to resolve IP address of a hostname. To use it, one just needs to require 'resolv' in the code. But sometimes, a user would want to check /etc/hosts first or some other mechanisms to resolve an IP address. In this case, one can require 'resolv-replace' and then replace the default DNS resolvers with customized DNS resolvers. For example, using resolv-replace, one would write require 'resolv-replace' Resolv::DefaultResol...

   RUBY,RUBY ON RAILS,NETWORK     2017-07-08 09:54:35

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