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  Java vs F#

Dr Cliff Click of Azul Systems, specialists in manycore JVM systems, recently published a blog post about the performance of Java compared primarily to C and C++ but also discussing C# and .NET. Three of Cliff's comments are of particular interest:Under the heading "Places where C/C++ beats Java for obvious reasons":"Value Types, such as a 'Complex' type require a full object in Java." - Dr Cliff ClickWhat Cliff forgot to mention is that .NET also provides value types and a far more compell...

   Java,F#,Performance,JVM     2012-03-07 05:07:31

  Amazon is a good company but doesn't have the best business model

Public opinion about a company is usually based on its performance. If it performs well, people will praise it, otherwise people will blame it. In 1999, Apple was still a broken apple(Steve Jobs's talent and effort was paid off yet). Public opinion about Apple was the closed model caused Apple's failure. They built hardware themselves, developed software themselves and delivered service themselves, this is certainly not sustainable. But Steve Jobs let everyone see this new model. In order to con...

   Business model,Amazon,Apple, Microsoft     2013-07-02 11:34:45

  What is Hystrix and How does Hystrix work

Background In distributed systems, there is one effect where the unavailability of one service or some services will lead to the service unavailability of the whole system, this is called service avalanche effect. A common way to prevent service avalanche is do manual service fallback, in fact Hystrix also provides another option beside this. Definition of Service Avalanche Effect Service avalanche effect is a kind of effect where the service provider fails to provide service which causes t...

   AVALANCHE EFFECT,HYSTRIX,DISTRIBUTED SYSTEM     2019-02-04 06:00:38

  Will camera be Android's next target after smartphone and tablet?

In Samsung's Mobile Unpack conference, Samsung announced one Android smart camera which supports 3G, 4G and Wi-Fi. This smart camera called Galxy Camera is equipped with the latest Android 4.1 system, 21 times zoom, 23mm ultra-wide-angle lens and 16 megapixel back-illuminated CMOS sensor, along with the OIS image stabilization technology. You can install various Android applications on this smart camera and edit photos and then share, it also comes with voice control function and cloud storage ...

   ILDC,Smart camera,Samsung,Android     2012-08-30 19:52:02

  7 misunderstandings of DNS resolution

DNS resolution is generally considered as providing mapping between domain name and IP address, for example www.google.com maps to 74.125.71.103. There are two important reasons for doing DNS resolution: IP address is hard to remember, while domain name is human friendly Virtual host may access different contents according to the header of the host domain name(sub-domain name) Some webmasters may have some unreasonable requirements when doing DNS resolution. It mainly because they are not very...

   DNS resolution,misunderstanding     2012-10-20 12:57:16

  C program to shutdown or turn off computer

C Program to shutdown your computer :- This program turn off i.e shutdown your computer system. Firstly it will asks you to shutdown your computer if you press 'y' the your computer will shutdown in 30 seconds, system function of "stdlib.h" is used to run an executable file shutdown.exe which is present in C:\WINDOWS\system32 in windows-xp. You can use various options while executing shutdown.exe for example -s option shutdown the computer after 30 seconds, if you wish to shutdown immediately th...

   C,Windows,Shutdown,Command,Code     2011-10-10 07:08:31

  Java code to retrieve Bing background image path

When Microsoft presented their search engine Bing, this new design gave us some surprise, especially its background images, they are very beautiful and it will change every day. But   unfortunately we cannot save the image onto our PC by right clicking the mouse.  After some research on its source code, I found a feasible but not so sophisticated way to achieve this, we can retrieve the image path from the source code and then use this path we can download the image. This is just to sh...

   Java,Bing,Background image path,URL,Download,Save     2012-05-02 10:51:51

  5 million units of Galaxy Note II are sold until now

Samsung announced on its official website that the Galaxy Note II sales have exceeded 5 million units, the number of shipments reached 2 million in last 24 days.Galaxy Note II was officially released at the end of August and was on sale at the end of September, equipped with Android 4.1 Jelly Bean system, 5.5 inches HD Super AMOLED screen and a 1.6GHz quad-core Exynos processor.In the first 37 days on sale, Samsung Galaxy Note II had achieved 3 million units of sales,the sales is  three ti...

   Samsung Galaxy Note II,Sale     2012-11-26 11:19:21

  Some cases where MySQL cannot be started

After installing MySQL, when we try to start MySQL, sometimes we may not be able to start it. The reasons can be different. We share some general cases where MySQL cannot be started. Case 1: Directory or file permission issue If the permission is set wrongly in MySQL's $datadir and its sub directories or files, MySQL will not be able to read and write files normally. Error message: mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data /usr/local/mysql/bin/mysqld_safe: lin...

   MySQL,Error,Log     2013-08-15 03:32:36

  Guide for installing Ubuntu in VirtualBox on Windows

Have you ever tried to have two OSs installed on your PC? Do you want to try out the new Ubuntu system? If you do want to use Ubuntu when at the same time you are using Windows, you may want to install your Ubuntu in an VirtualBox. In this post, we will show you how to install Ubuntu in VirtualBox on Windows. Pre-requisites VirtualBox -- You can download it from Oracle. Ubuntu -- You can download it from here. Please note it should be an ISO file The Ubuntu used in this post is Ubuntu 12.04 LT...

   Ubuntu,Windows,VirtualBox     2014-01-15 03:21:05

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