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  /dev/null and /dev/tty in Linux

In Linux, there are two special files /dev/null and /dev/tty. /dev/null will drop all the data written to it, i.e, when program writes data to this file, it means the program has completed the data write operation. But in  fact it does nothing, if you just want the status of a command but not the output of a command, this feature will be very useful. See below shell codes:     /> vi test_dev_null.sh        #!/bin/bash    if grep...

   Linux,/dev/null,/dev/tty     2013-03-04 02:23:23

  Writing forward-compatible websites

This is a list of best practices for creating websites that do not break when browsers are updated. It's not always possible to follow all of these, but following as many of them as possible will help future-proof your website. This is especially important for intranet applications and other non-public websites where problems are likely to not be noticed during testing by browser vendors.JavaScriptPrefix all global variable access in onfoo attributes with “window.”When an e...

   Web design,Forward compatible,CSS,JavaScript,window     2011-11-23 08:07:35

  Shortcut keys in Sublime Text 3(Animated demo)

Sublime Text 3 is a light weight code editor which supports lots of languages. It has lots of shortcuts and plugins easing work of programmers. In this post, we will introduce some shortcuts supported in Sublime Text 3 and show how powerful they are. 1. Select sibling matching(equal) word (Ctrl + D) Put the cursor on one word, press Ctrl + D to select the word, then press Ctrl and following by pressing D, it will select next matching word. The number of Ds pressed will mean number of matching wo...

   TIPS,SHORTCUT KEY,SUBLIME TEXT     2016-04-28 02:41:28

  Disposable Email address

There is one statement which says Giving out your email address is like starting a relationship. What happens when you want to break up?Once you gave out your email address, you may take the risk of receiving big amount of junk emails. However, when we register on some websites, we must provide our Email address to receive authentication emails. If we cannot receive the authentication email, we cannot finish the registration process. Is there any alternative way?We can use disposable email, i.e,...

   Disposable email,Website,Summary     2012-05-19 12:27:14

  Microsoft unveils a new logo

When releasing Windows 8, many people thought that Microsoft would use the blue logo as company's logo. But we are "cheated", Microsoft unveils a new logo. Watch video below. Since unveiling its first logo in 1977, Microsoft has changed its logo a few times, they are  In 1977, its "Micro-Soft" Microsoft "blibbet" logo, filed August 26, 1982 at the USPTO and used until 1987. Microsoft "Pac-Man" logo, designed by Scott Baker and used from 1987 to 2012 with the 1994–2002 slogan"W...

   Microsoft,Logo,Windows 8     2012-08-23 20:04:03

  HTML5 Video and DRM

Many people call HTML5 an Adobe Flash replacement and I agree. Adobe already discontinued Flash on mobile devices. So HTML5 Video is a must for video on mobile phones and tablets. On the desktop Flash Video players are used more than HTML5 Video players but HTML5 video will work with a current web browser on a site that supports HTML5 video. Commercial video sites like YouTube will play partnered content in Flash even if you turned on HTML5 video at http://www.youtub...

   HTML5 Video,Flash,DRM,Comparison     2012-02-05 07:18:23

  The future of IT will be reduced to three kinds of jobs

Takeaway: The IT profession and the IT job market are in the midst of seismic changes that are going to shift the focus to three types of jobs. There’s a general anxiety that has settled over much of the IT profession in recent years. It’s a stark contrast to the situation just over a decade ago. At the end of the 1990s, IT pros were the belles of the ball. The IT labor shortage regularly made headlines and IT pros were able to command excellent salar...

   IT,Potential,Consultant,Developer,Projec     2011-07-27 08:46:59

  Java 9 release is delayed again

The original Java 9 planned release date is March 2017. But latest source shows that Java 9 release will be delayed again to July 2017. It's four months later than the planned date. Oracle Chief Architect of Java Platform group Mark Reinhold proposes this new release date in a message sent on the OpenJDK mailing list.  Despite this progress, at this point it's clear that Jigsaw needs more time. We recently received critical feedback that motivated a redesign of the module ...

   JAVA,RELEASE DATE,JAVA 9,JAVA 9 DELAY     2016-09-26 12:22:53

  How does GoLang know how many CPUs to use?

When running lscpu command on Linux, it will list the CPU info on the machine. Take one example where there is one CPU with 2 cores and each core has two threads which indicates there are 4 cores available. Now let's see how many cores GoLang program would identify. From output, NumCPU and GOMAXPROCS both output 4 which is expected. How does go runtime get this info, does it get it through similar command like lscpu or /proc/cpuinfo? Let's dig more in GoLang's source code. In runtim...

   GOLANG,CPU,NCPU     2020-12-29 23:22:15

  The Mature Programmer

1. The Mature Programmer The mature programmer manages their own time and productivity well. The MP knows that maintenance is as much work as the initial writing and code always takes longer than you think. The MP knows that any changes to code can introduce bugs, no matter how seemingly trivial. The MP knows that premature optimization is foolish and dangerous. The MP knows that sexy coding like writing big complex systems from scratch is rarely the best way to go. The MP does not get...

   Mature programmer,MP,Feature,Coding standard,Efficiency     2011-12-05 13:12:00

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