SEARCH KEYWORD -- INTERVIEW QUESTION
gethostbyname vs getaddrinfo
getaddrinfo is slower than ping when resolving domain names. I think ping uses gethostbyname to resolve a domain name. The question becomes whether getaddrinfo is slower than gethostbyname. After testing with both functions, we find that getaddrinfo is really slow compared to gethostbyname. By strace tracking, we find getaddrinfo will communicate with DNS server 10 times and gethostbyname will communicate with DNS server communication twice.gethostbyname is an old way to resolve domain nam...
Are college students learning?
In his State of the Union address last Tuesday, President Obama proposed several measures to lower college tuition. University leaders responded cautiously, warning that cost-cutting reforms might also cut into instructional quality. But here's the big open secret in American higher education: Most institutions have no meaningful way to measure the quality...
College students,Learning,Survey 2012-02-02 07:10:02
When Should Open Source Be Written Into Law?
As a systems administrator, I tend to think about source code and computing platform in large numbers. Computers however are getting smaller and more powerful, and the reality of computers that we put in or on our body as a normal daily routine is coming closer, and for many is already here. When our safety, our liberty, and our sense of humanity are tied to programmable devices, should we not only hope, but expect that we should have the right to examine how these devices function? Last ...
Software,Open source,Time,Law 2012-01-28 07:23:09
Becoming a Better Developer, Part 1: Making Fans
If you're trying to grow your startup you've come to the right place. Get my 170-page ebook on how to grow a startup and join thousands of self-funded entrepreneurs by subscribing to my newsletter at right. This is the first of what I hope to become an ongoing series about non-technical ways to improve yourself as a developer. Becoming a better developer involves more than learning new technical skills; learning about your company and co-workers will dramatically improve the software y...
IDC lists top 6 myths, realities about open source
Summary: What are the top 6 myths? That open source software will enter every market, is inherently innovative, it improves faster than commercial software, that it has less lock-in, that it’s free and that it has little benefit if one is not involved in the community. IDC calls these ideas “myths†but acknowledges there’s more than a grain of truth to all of them At its Directions 2012 conference in Boston today, IDC rev...
IDC,Open source,Reality,Free,Contribution 2012-03-16 08:47:53
Why Building a Mobile App is Hard
Kent Nguyen has a great article about how building iOS apps takes a lot of work. And, here at Parse, we agree. Making a well-designed app is not a trivial task. Many non-developers hugely underestimate the amount of sweat and tears that goes into a single app. The big component that is overlooked and that Kent stresses is the server component. An app is not an island. Users expect their apps to richly interact with the internet. This means you need to worry about developing code on servers, com...
Mobile app,Hard,Chanllenges,Platform 2012-02-01 04:45:45
Prototypes and Inheritance in JavaScript
Forget everything you know about object-oriented programming. Instead, I want you to think about race cars. Yes – race cars. Recently I was watching the 24 Hours of Le Mans –a popular racing event in France. The fastest cars in the race are the Le Mans Prototypes. Although these cars are built by car manufacturers like Audi and Peugeot, they are not cars you’ll see on the streets and highways of your home town. They are built exclusively for high-speed endurance ra...
JavaScript,Prototype,Inheritance 2012-02-27 04:55:22
How to hire an idiot
Wow, I remember how idealistic I was when I was about to bring on my first employee! After dealing with bad bosses over my career, after doing a whole lot of thinking about how I was going to be a great boss, and after doing a whole lot of reading about how to hire effective people, I was really looking forward to it. I was going to:-- Hire people smarter than myself, who get things done!-- Trust them to do their job, let them do their job and give them enough resources to do it!-- Pay them WELL...
Employee,Idiot,Work experience,Pay,Process 2011-10-24 11:47:54
Click and Drag on xkcd
xkcd is a webcomic created by Randall Munroe. The comic's tagline describes it as "a webcomic of romance, sarcasm, math, and language." Also some webcomics about IT may frequently appear on it. For example, the following one-- People who know Unix will understand it easily. In fact, xkcd is a Geek culture, many comics inside this site can only understood by some specified group of people. The comic began in September 2005 when Munroe decided to scan doodles from hi...
xkcd, 1110,Click and Drag 2012-11-05 11:23:19
Communicating Between Widgets in a Rich Internet Application
As a part of our October Free Dojo Support initiative, we received the following question from Manu Subramanian about how to manage communication between distinct components in a rich internet application: We are building an application with dojo. It does have many inter connected interface parts. For example it does have a top bar with drop down buttons. The menu items opens tabs in a tab controller. In general we need to call functions from different widgets or there are many interconne...
Internet application,Rick internet,Widget,comminucation 2012-03-16 10:49:36
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