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Method chaining and lazy evaluation in Ruby
Method chaining has been all the rage lately and every database wrapper or aything else that’s uses queries seems to be doing it. But, how does it work? To figure that out, we’ll write a library that can chain method calls to build up a MongoDB query in this article. Let’s get started! Oh, and don’t worry if you haven’t used MongoDB before, I’m just using it as an example to query on. If you’re using this guide to build a querying library...
Ruby,Method chaining,Lazy evaluation,Implementation 2011-11-29 08:51:17
Coder or Clown?
That’s the challenge. Sit down with someone you’ve never met and try to work out if they are a coder or a clown. I don’t mean to insult anyone, of course, and I’m the first to acknowledge the years of training and effort that goes into being a professional clown. But some coders, oh boy. Like the time I interviewed a recent graduate. I’ll call her Ada. Full of sympathy for the novice programmer I started with a gentle warm-up, a soft-ball question to break the ...
How NOT to teach a computer language
For the past year or so my wife has been taking online classes to get a computer science degree. For most of her classes she’s done great, she’s been flying through HTML and SQL, even up to the point where she can handle multilevel joins and optimizing through indexes. That was until she hit her vb.net class. I had no idea why she was having problems with a language has easy as vb.net so I started helping her out and find out why she was having so many problems. I’ve also ad...
Programming,Teach,Book,Grade,Method,Computer 2011-11-06 14:52:13
A Better Way to Learn How to Program
Learning how to program can be a nightmare. An aspiring coder has to jump through many unpleasant hoops and mysterious error messages just to get "Hello, World!" printed on the screen. Then, she's left wondering, "OK, now what? How do I actually build something?"As game developers seeing someone struggle through this, we should be screaming, “NOOOOO!†The whole thing reeks of bad game design: a lot of work with no reward, unclear failure cases, advanced features pushed on new players...
Programming pattern,Game design,Derivati 2011-09-19 13:51:17
Live in Beijing and Thinking about Starting a Tech Company? Read. This. Post. Now.
The Disrupt Beijing Hackathon starts in a little more than 24 hours, and we’ve been working hard over the last few days to make it even more of a no-brainer for local Beijing developers to attend.In addition to the chance to be the next GroupMeor win valuable prizes, we have decided to give all Hackathon attendees who complete a hack and present in the 24-hour period free tickets to the Disrupt conference Monday and Tuesday. That’s a $1,000-plus value for s...
Startup,Beijing,TechCrunch,Disrupt,2011 2011-10-28 12:41:43
Building a Modern Web Stack for the Real-time Web
The web is evolving. After a few years of iteration the WebSockets spec is finally here (RFC 6455), and as of late 2011 both Chrome and Firefox are SPDY capable. These additions are much more than just "enhancing AJAX", as we now have true real-time communication in the browser: stream multiplexing, flow control, framing, and significant latency and performance improvements. Now, we just need to drag our "back office" - our web frontends, app servers, and everything in between into this cen...
Web design,Real-time web,web stack 2012-02-15 05:54:41
Static Code Analysis
The most important thing I have done as a programmer in recent years is to aggressively pursue static code analysis. Even more valuable than the hundreds of serious bugs I have prevented with it is the change in mindset about the way I view software reliability and code quality.It is important to say right up front that quality isn’t everything, and acknowledging it isn’t some sort of moral failing. Value is what you are trying to produce, and quality is only one a...
Static code,Analysis,Quality,Microsoft 360,Value 2011-12-24 06:50:18
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...
“Build something people want†is not enough
Most people take “Build something people want†to mean “Pick a problem to solve and solve it well.†This is not sufficient to build a world changing company.“Why now?†is the question entrepreneurs really need to answer. “Why now†encompasses two important and closely related concepts:Why have previous attempts at this idea failed?What enabling factors have emerged that enable you to succeed today?The world is full of smart people who have the same...
User requirement,User friendly,Example,People needs 2011-11-16 08:18:45
Is Ubuntu becoming a big name in enterprise Linux servers?
Summary: Mark Shuttleworth says yes, Ubuntu is now competitive with Red Hat Enterprise Linux in the enterprise space. Since last summer, Ubuntu has been more popular than Red Hat as a Web server. When you think of Ubuntu Linux, what do you think of? I would guess you think about the Linux desktop. While Ubuntu is certainly a big player—maybe the biggest—when it comes to the Linux desktop, Mark Shuttleworth, founder of Canonical, the c...
Linux,Ubuntu,Daat center,Server 2012-04-15 01:22:53
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