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  How does computer boot up?

The whole boot process of computer can be summarized in 4 phases. 1. BIOS In the 70's  read-only memory(ROM) was invented. The boot program is written into ROM, the first thing the computer does is to read and execute this program when it's powered on. The program in this chip is called "Basic Input/Output System" (BIOS). 1.1 Power-On Self-Test The BIOS will first check whether the computer hardware can fulfill the basic conditions for booting up, this process is called Power-On Self-Test...

   Computer, boot, partition     2013-02-23 23:19:47

  Building A Strong Indie Game Development Team

Are you looking to set up an independent game development team?  You’ll need a team that covers all areas of game development including programming, art, design, sound, project management and business.  You need to pick the right people that can work together for months or even years.  Below are some tips for putting the right team together to increase your chances of success. Roles Game development involves a number of common roles as well as some overlooked ones.  I...

   Software design,Game design,Team work,Pr     2011-08-24 02:16:32

  Tricks with Direct Memory Access in Java

Java was initially designed as a safe managed environment. Nevertheless, Java HotSpot VM contains a “backdoor” that provides a number of low-level operations to manipulate memory and threads directly. This backdoor – sun.misc.Unsafe â€“ is widely used by JDK itself in packages like java.nio or java.util.concurrent. It is hard to imagine a Java developer that uses this backdoor in any regular development because this API is extremely dangerous...

   Java,Directly memory access,Tricks,JVM     2012-02-13 05:31:19

  Kodiak PHP can run PHP codes offline on iPad

In the eyes of the vast majority of application developers, iPad is the terminal equipment for running code, rather than the tool used to write code. However, there are some applications developers finding iPad's potential to develop a wide variety of programming applications with some applications, such as Diet Coda, Koder, Gusto and so on. The family of applications for writing applications has added a new member -  Kodiak PHP. This application runs on iPad, it can be used to develop PHP ...

   Kodiak PHP, rogramming,iPad     2012-09-24 11:54:08

  Which one cost more in development : Android vs iOS

As for which platform has more development cost, there are many different views. Using Android we no need to spend money on an expensive Mac computer, iOS test machine and $99 year fee for each developer account. While developing iOS apps does not require much testing, screen adaption, debug and script compatibility considerations. Let's see a few views shared by some developers. Nan Li, ERP/SAP/Mobile network/Japan/Apple/KKK@ifanr Because of the performance of iOS, it actually has domina...

   Android,iOS,Development cost,Comparison     2012-03-23 13:39:48

  Install multiple versions of Go

As a developer, there might be need in some cases to have multiple versions of Go installed. One may test out some new features of the latest version of Go but also wanna maintain a stable version of Go for daily development purpose. How to maintain multiple versions of Go? The GoLang official website has provided a way to maintain multiple versions of Go by using go get to install the different versions of Go. Below are steps: Download a normal version of Go and install it Go to the Go release...

   MULTIPLE VERSION,GO BINARY,GO VERSION     2021-05-16 02:01:46

  Are college students learning?

In his State of the Union address last Tuesday, President Obama proposed several measures to lower college tuition. University leaders responded cautiously, warning that cost-cutting reforms might also cut into instructional quality. But here's the big open secret in American higher education: Most institutions have no meaningful way to measure the quality...

   College students,Learning,Survey     2012-02-02 07:10:02

  How to prevent next HeartBleed bug?

How to ensure the security of open source projects is a concern for many open source users including individual users and companies. But it's not an easy task to ensure the security of open source projects. Because everyone can see the source code, there is much higher possibility that a bug may be found by someone. Once a bug is disclosed, people may exploit it and do evil things, this may cause loss of money either for individuals or companies, some of the bugs may even have big impact to the...

   Open source,HeartBleed,Security     2014-04-24 09:07:05

  Java Sequential IO Performance

Many applications record a series of events to file-based storage for later use.  This can be anything from logging and auditing, through to keeping a transaction redo log in an event sourced design or its close relative CQRS.  Java has a number of means by which a file can be sequentially written to, or read back again.  This article explores some of these mechanisms to understand their performance characteristics.  For the scope of this article I will be using pre-a...

   Java,IO,Sequential,Blocking     2012-02-23 07:09:10

  Select top 3 values from each group in a table with SQL

Yesterday, my friend Liu Bing asked me a question about how to select top 3 values for each person in a database table using SQL. I think this question is interesting and it deserves some thoughts. Here I record down how to solve this issue. Assume we have a table which has two columns, one column contains the names of some people and the other column contains some values related to each person. One person can have more than one value. Each value has a numeric type. The question is we want to se...

   SQL,Correlated query,top 3     2013-05-23 03:21:25

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