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The Cognitive Benefits Of Chewing Gum
Why do people chew gum? If an anthropologist from Mars ever visited a typical supermarket, they’d be confounded by those shelves near the checkout aisle that display dozens of flavored gum options. Chewing without eating seems like such a ridiculous habit, the oral equivalent of running on a treadmill. And yet, people have been chewing gum for thousands of years, ever since the ancient Greeks began popping wads of mastic tree resin in their mouth to sweeten the breath. Socrates pr...
Innovation Works CEO Kai-Fu Lee is diagnosed with cancer
Innovation Works CEO Kai-Fu Lee is diagnosed with lymph cancer. He posted one weibo(Chinese version of Tweet) which indicates that his health in a bad condition at 10:17pm on 5 September Beijing time. Later Innovation Works spokesman Zhaohui Wang confirmed this news. And Mr Lee is currently receiving treatment following doctor's instructions. But now we still don't know how severe it is. Post Mr Lee's weibo, many Chinese netizens expressed their concerns for his health and wished hi...
Kai-Fu Lee,Cancer,Innovation works 2013-09-05 10:57:39
Bash Shell Scripting - 10 Seconds Guide
This Bash shell scripting guide is not a detailed study but a quick reference to the BASH syntax. So lets begin... Common environment variables PATH - Sets the search path for any executable command. Similar to the PATH variable in MSDOS. HOME - Home directory of the user. MAIL - Contains the path to the location where mail addressed to the user is stored. IFS - Contains a string of characters which are used as word seperators in the command line. The string normally consists of the spac...
Bash,Shell,Linux,Tutorial,10 seconds,Shortcut key 2012-02-28 08:05:41
CSS position explained
CSS has two very important properties on determining the position of an element in webpage: display and position. display is used to determine how elements are grouped and displayed on the page. While position is used to determine the exact position of an element on a page. And this post would explain position property in detail. position is used to determine the exact position of an element on a page. It has five possible values. static relative absolute fixed sticky sticky is supported start...
C programming tips in SPARC architecture
If you are a newbie of C programmers in SPARC architecture (For example, working on Solaris), you should pay attention to the following tips:(1) By default, SPARC is big-endian (For Endianness, you can refer http://en.wikipedia.org/wiki/Endianness). It means for an integer (short, int, long, etc), the MSB will be stored in the lower address, while the LSB will be stored in the higher address. (2) SPARC requires byte-alignment. It means for a short (2 bytes long) variable, the star...
C 2014-06-01 03:56:30
Use downcase! with caution in Ruby
Ruby provides ! to change state of some object in place. Hence if you see some functions have ! appended, it means the state of the caller of the function is expected to be changed. This is a very interesting Ruby feature. But sometimes one should be cautious when using this kind of functions because you would get unexpected behavior if using improperly. Let's take an example of String#downcase!. According to the documentation. Downcases the contents of str, returning nil if...
RUBY,EXCLAMATION MARK,DOWNCASE 2017-02-10 06:34:44
Introducing the for-if anti-pattern
Over the years, I've seen a bunch of coding anti-patterns. I figured maybe I'll share a few. Today, I'll introduce what I'm calling the for-if anti-pattern, also known as "We'll sell you the whole seat, but you'll only need the edge." This is a special case of the for-case anti-pattern, where all but one of the cases is null. for (int i = 0; i < 100; i++) { if (i == 42) { do_something(i); } } This can naturally be simplified to do_something(42); The for-if anti-pattern arises in ma...
Programming,Anti-pattern,for-if,efficiency 2012-02-02 10:18:15
A tutorial on Github Actions
Github Actions is a CI/CD service created by Github. It aims to make it easy to automate all software workflows, now with world-class CI/CD. Build, test, and deploy code right from GitHub. It was launched in October 2018 and was officially available to all users in November 2019. This post will give an introduction of Github Actions and explain how it works. What is Github Actions Normally Continuous Integration includes some steps, fetching code, running test, sshing into remote server in...
GITHUB,GITHUB ACTIONS,CI,CD 2019-12-23 05:33:39
Code coverage rate
When doing unit testing, the code coverage rate is often used as the criteria for measuring testing performance, even in some cases code coverage may be used to consider whether the testing task is completed or not. So testers need to spend much time on designing test cases which can cover as many codes as possible. There are advantages and disadvantages about using code coverage rate. First let's check what is code coverage rate: code coverage rate= the degree of code coverage in testing. There...
Unit testing,Code coverage 2013-04-16 12:50:57
When to Make a Mobile Web Application
I believe that unless your application meets one of these native application criteria, you should not create a native application, but should instead focus on building a mobile web application. Like I said before, I’m a big fan of native applications and I feel that there are a lot of great innovative and market opportunities here, but mobile web apps are the only long-term viable platform for mobile content, services, and applications. Native applications don’t service t...
Web app,Situation,Condition,Native application 2011-12-12 02:45:52
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