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Proximity Cards Do More Than Just Open Doors
Credit: Susanne Plank via Pexels Locksmiths from centuries ago couldn’t have possibly imagined opening a door by tapping a card roughly the size of a credit card. Back then, security depended on physical locks, not sealed antennas made from coiled wire, integrated circuits, and capacitors. Today, proximity cards are a popular form of keycard used in hotels, government buildings, healthcare facilities, and many more places. They open doors for people with authorized access, but they also d...
What to put on whiteboard during an interview
As a programmer, you may go through different kinds of programming tests while interviewing for jobs. The most famous and difficult one may be the whiteboard test for lots of people. Usually the interviewer will give the candidate an algorithm problem or case study and ask the candidate to implement the algorithm with his/her favorite programming language. The code to be written is not too much but it requires the candidate to thoroughly consider different edge cases. So wha...
TIPS,INTERVIEW,WHITEBOARD TEST 2014-08-29 20:34:52
How to let Google index AJAX contents?
There are lots of websites containing only one page now with the popularity of AJAX. The website will load different contents according to different inputs from users. This approach provides good user experience and it also helps save bandwidth, the drawback is that AJAX contents are not easy to be indexed by search engines. For example, if you have a website: http://example.com Users can see different contents with the appended # structure in the URL: http://example.com#1 http://example.com#2 h...
AJAX,Search engine,Google,History 2013-07-16 00:47:14
What I learned from Google - You Get Fifteen Years
four years ago I was in Mountain View, California, interviewing for a position with Google. It was an odd sort of interview. Lots of puzzles, math-like challenges, and code. Lots, and lots, and lots of code. What struck me at Google wasn’t the challenges. Nor was it the office environment, the cafeteria, or the mini-swimming pool, all of which were impressive. No, what struck me were the people. All of the people I met — and I mean all of them — had this ...
Career,Technology,Programmer,Transform,Lifetime 2011-12-06 02:27:04
Why using anchors as buttons sucks
So let's say you're an awesome web developer making an awesome web app. One day, you add a link in the web app that has an event handler instead of an href. Testing it, you realize that your cursor doesn't change when hovering over it, unlike a normal link. You think for a minute and then give it a cursor:pointer style, which fixes the issue. You are happy.The next day, QA informs you that the link cannot be tabbed to. Confused, you do some research and find a solution to the problem: Sim...
Sites to go if you want to learn web development
Before you start to do web development, either for a hobby or for your start up project, you should be prepared for learning many different technologies including both front end and back end. You may need to deal with UI design, business logic design, data store and infrastructure setup etc. This seems a very complex. Indeed, if you know where you should go, the it's actually not so hard. Here are some sites you should go when you face issues while you are doing web development. These site...
Web development,Resource,Site 2013-09-19 08:12:23
How Google Utilizes Big Data for SERP
Google is an expert when it comes to big data. This is evident in their development of various techniques and open source tools which are used by the big data industry professionals. These tools and technique allow Google to sift through millions of different websites and enormous amounts of data in order to provide users with correct answers in a matter of milliseconds. But how does Google accomplish that with such precision? To answer that, we need to focus on the complex activities that go o...
App defeats web
As an admired rock musician and co-founder of the venture capital firm Elevation Partners, Roger McNamee has a statement about Apple : The reason why Apple is so successful today is because App defeats Web.Apple divides contents of web into small apps, and then ask users to pay. This actually means that Apple creates a new business model which is fundamentally different from Web.Commodity Content and Differential ContentCommodity Content is the information model in desktop and web era which is h...
Hail the return of native code and the resurgence of C++
Programming language trends come and go. First, Java is the hot new language, then it's Python, then Ruby steals the limelight, then it's back to JavaScript. But the latest language darling is probably the last one anyone expected. Believe it or not, 2011 could be the year of C++. Last week, the latest version of the ISO C++ Standard was approved by unanimous vote. It's the first major revision of the language in 13 years. Now officially known as C++11, the new standard introduces features desig...
C++,Future,Return back,Popular,Local dev 2011-08-24 02:20:24
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
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