SEARCH KEYWORD -- Configuration
Use DTrace to diagnose gdb issues
A few days ago, I installed the newest 64-bit gdb program (version 7.7.1) on Solaris 10 (X86_64 platform) to debug programs. After playing with the gdb a day, I found 2 issues about gdb:(1) The "set follow-fork-mode child" command doesn't take effect. By default, after the parent process forks the child process, the gdb will track the parent process, so this command can make gdb begin to follow the child process. But this command works OK on Linux.(2) The gdb can't parse the 32-bit application c...
Will PHP __autoload() function really affect performance?
IntroductionRegarding to PHP performance, the most frequently discussed is the __autoload() function. Many people say that this function will affect the performance very much, some other people say that opcode will affect __autoload() as well. So we will have some tests on these two.EnvironmentPHP 5.3.9 -- Launch under fastcgi modeNginx 1.1.12eAccelerator 0.9.6.1ScreenshotsLaunch pageeAccelerator(In php.ini) configurationFile structure(each Test file has over 6000 lines of code)Testing With e...
PHP,__autoload(),opcode,performance 2012-05-09 11:25:26
Tips of Drafting an R Markdown Document
When presenting the data summary and exploratory analysis, we used to copy a lot of tables, charts from Rstudio to PowerPoint, which makes the presentation preparation painful. It becomes essential for data scientists to make use of better reporting tools, such as R markdown, Jupyter notebook to prepare the analysis presentation in a more efficient and organized way. Of course, we want this to be reproducible! In this post, I would like to share some tips of using the right tools to draw tables,...
R PROGRAMMING 2020-11-01 23:09:45
Use Memory Analyzer Tool in Eclipse
When developing applications, we often encounter memory issues of an application. To analyze how much memory each class takes, we need to have some specific tools to assist us. One of them is Memory Analyzer Tool on Eclipse. The Eclipse Memory Analyzer is a fast and feature-rich Java heap analyzer that helps you find memory leaks and reduce memory consumption. To use the Memory Analyzer Tool, you first need to install it on Eclipse. You can go to Help -> Install New Software.... Paste h...
Memory analyzer tool, Eclipse,heap dump, HPROF 2014-10-28 07:22:35
20 Database Design Best Practices
Use well defined and consistent names for tables and columns (e.g. School, StudentCourse, CourseID ...).Use singular for table names (i.e. use StudentCourse instead of StudentCourses). Table represents a collection of entities, there is no need for plural names.Don’t use spaces for table names. Otherwise you will have to use ‘{‘, ‘[‘, ‘“’ etc. characters to define tables (i.e. for accesing table Student Course you'll write “Student Cour...
Database design,20 tips,Well defined name,Design pattern 2012-02-07 12:10:48
Chrome extension to display desktop notification
Have you ever thought about writing extension for web browsers so that we can complete some tasks easily. Do you think writing extension for browsers is very difficult? You have no clue where to begin? On Chrome, this isn't any problem now as long as you know how to write HTML,CSS and JavaScript. We will show one example of Chrome extension today. The extension will display a desktop notification on your desktop. You need to create two files here, one is the notification.json which is the config...
Chrome extension,Desktop notification,Example 2013-06-29 22:23:51
Why to Build Modern Web Apps with ASP.NET?
ASP.NET offers multiple options for fabricating cloud-based web applications. Its features such as the ability to cope up with different platforms including Mac, Linux, and Windows along with its open source nature indicate its efficiency. The various architectural modifications in the core framework have made the system more affable, and modular components make the job easier by simplifying the various implications. Microsoft has worked on the roots of this software to render a sophistica...
WEB DEVELOPMENT,ASP.NET DEVELOPMENT, WEB APPLICATION DEVELOPMENT,.NET DEVELOPMENT 2016-01-25 03:43:26
Microsoft is filing a new patent about transparent display
Microsoft is filing a new patent about transparent display screen, it may be used on augmented reality technologies of tablets, phones and laptops. Similar to the scenes in the movie Minority Report. Minority Report was showed in 2002, it described a world of 2054, at that time 3D technology is mature. But after 10 years of this movie, Microsoft not only invented the basis of this technology, but also make it more portable.Patent Bolt recently revealed a patent application of Microsoft about tra...
Microsoft,Transparent display,3D,Patent 2012-05-10 05:31:16
How to Choose the Right Ruby on Rails Hosting Platform
Over the last decade, Ruby on Rails has become an increasingly popular framework for web-based apps. At its beginnings, hosting Rails was a real challenge and required a fair amount of relevant know-how. Nowadays, there are dozens of hosting platforms that provide cheap and accessible services for building and deploying Rails apps. In general, the choice of hosting should be based on your requirements and technical skills – some platforms are much more difficult to handle than others. Here...
ruby on rails, ruby hosting 2015-01-30 06:27:47
Are frameworks making developers dumb?
Last week I got to take interviews to hire senior java developers with around 5 years of experience. But after the interview process is over I felt like the frameworks makes developers life easier but at the same time making them dumb.Everyone puts almost all the new frameworks on their resume claiming they have "Strong, working experience on Spring, Hibernate, Web Services etc".Here is how the interviews went on.Me: You have used Spring in your latest project. What are the advant...
Framework,Importance,Disadvantage,Easy 2011-09-06 08:10:08
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