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This is because join negatively impact the scalability of a DB: - When huge amount of traffic hits your DB, out of the most commonly run-out resources - CPU, Memory, and IO - CPU is usually the one that runs out first. And Join uses quite a bit of CPU. - When you have a lot of data and have to partition it, you will feel so lucky if you don't have to deal with distributed joins.

I have used many languages professionally and in my personal projects. Java is the language that makes me most productive. Why? It has the best tooling support. There are a few things that is extremely important for my productivity: - Precise autocomplete - Jump from a name to its definition - Call hierarchy - Code template - Auto formatting - Great unit test support - Stable and high quality debugger - Hot swap - Drop to frame during debugging - Remote debugging - Profiling and heap analysis

Recently, I am working on both a very large C++ code base and similarly large Java code base. In C++, I find myself routinely use logging and printf for debugging, because switching to debug build and use a debugger is such a pain. In Java, debugging is much easier. The feeling is like night and day.

It does not have it now, because they want to focus on the basics. Once that is done, adding a camera is not a big deal.

You can use another "attacker" balloon to do it.

Just cover the continent will require a lot of balloons. The world has 148,429,000 sq km. If you cover 1600 sq km per balloon, that is 92768 balloons. Just cover Africa will require around 20k balloons. It will only work out, if Google can increase the coverage area per balloon.

Scalability is an architecture issue, not a programming language issue. You can certainly build linearly scalable system in Ruby. It just costs more to scale a Ruby app vs. an equivalent Java app. In the end, the tradeoff is between engineering cost and operating cost. When you spend 100k to hire an engineer and your traffic can be handled by a few boxes. Engineering productivity is your primary focus. As your traffic grows, you need more and more servers, server efficiency becomes more and more important. At some point, the savings in server cost justifies the increased cost in engineering effort and you make a switch from Ruby to Java.

There are lots of things in the toy, art, and spare part category that can use the 3D printing technology. Just like many other technologies, 3D printing will be adopted by designers, hobbists first. If there is enough demand, it will show up in shared workshop such as Kinko. It may or may not make into every home. Who knows. It really depends on if there is any killer app that drives the demand.

There are security issues with this approach. However, I wouldn't mind if a site offers both traditional login and email based login. Then, I, as a user can choose which is the most appropriate.

There are a lot of ebay market research tools out there. You will need to stand out either by pricing or by feature. Good luck.

So, growth hacker is a marketer. Fine. But not all marketers are growth hackers. My understanding is that, growth hacking is a specialty in marketing which focus on consumer web marketing. It is also a very technical and hands on position. As a growth hacker, you not only need to have a marketing plan, but also need to implement or help implement the marketing plan. There is nothing wrong for giving a name to a sub-category of marketing profession.

Great idea! I just added backend function to your prototype. The dashboard UI is at: http://s.myezapp.com/demo5/app/ezstatus/guest/dashboard.ws The admin UI is at: http://s.myezapp.com/demo5/app/ezstatus/pages/taskslistpage....

Please login as demo5/demo5 to use the admin UI.

It comes with complete source code. Please feel free to take it from there and improve it. Thanks!

I made the utility to help you track the rank of your hacker news post. Simply enter item id, or click "back" and select "History"->"View". Feedbacks are welcome.

Note: It only has two days of data, so older news won't work.

love this piece. thanks for posting it. it reminds me one of the talk by Jobs: http://www.youtube.com/watch?v=dR-ZT8mhfJ4

drunk or stupid people probably won't click 'back' that quick.

you can use http://www.myezapp.com/pub/help/hackernews.ws to build custom tools. one example/test case that collects Show HN stories are at http://testblog1-myblog.blogspot.com/

disclaimer: i build the site and appreciate any feedbacks.

Awesome!

AdSense has much lower margin compared with AdWords because Google has to pay publisher for displaying the ads. In the early days, (AdSense revenue around 1B) I remember google was almost paying every penny they got from AdSense back to the publisher. Only later, they started to make money, but still capped by the competition from microsoft/yahoo.

Facebook entering the AdSense market? It won't generate a lot of profit for facebook. The true profit engine for facebook is still the facebook site.

This post is quite relavent to the recent discussion on whether regular people should learn programming. I take it as a challenge and ask: do we have a programming language that regular people can learn easily. Star Script is my attempt at meeting the challenge. I would like to hear your feedback. Thanks!

Note: You can download and try star script at http://www.starsrc.org. You can try it online at http://www.myezapp.com.

This site is protected with a password.

Yes. When you schedule a recurring event, such as daily reminder, you will have to store timezone. In that case, you are storing a scheduling specification, not a real date/time. You don't have the complete information, such as year/month, etc.

You need timezone for sure. You just don't have to store it along with every date/time value. You can store it as user preference for example. What if you are scheduling a meeting between a U.S developer and an India developer?

I would not go with the approach of storing timezone and formatted date/time in two seperate char columns. You need to really seperate date/time information into two parts, the absolute time and it's presentation. Usually, you only store the absolute time in database and control timezone at session/user level. You always apply timezone when you present date/time information and always convert date/time to absolute time when you store it.

With the leaving of Scott, I hope yahoo will be able to settle patent dispute with facebook.

Could trackback or pingback satisfy the need? Or there are additional requirements I am missing?

To some extend, 100% uptime is like perfect security. There is no perfect security, the closer you get to it, the more expensive it is. At some point, you have to draw a line and design your system to deal with the downtime.

Everybody learns natrual language, yet large number of people cannot learn programming language. It sounds like learning programming language is harder than learning natrual language. This is not intuitive to me. A lot of concept in natrual language are much more abstract and difficult to understand than the assignment concept. Even the leap from one apple, two apple to one, two is a much bigger conceptual leap. I see the story as a failure in education.

Programming is such a powerful and important tool. I believe it needs to be in the hands of the regular people.

To enable masses to program, today, there are two approaches. One is to teach people to use existing programming languages, the other is to create drawing tools, so that people can draw a program, instead of writing one. Both approaches face difficulties taking off.

It is not by accident. For the first approach, all existing programming languages are too difficult for the average to learn and use. The second approach is appropriate for the beginners to learn programming concepts. Once the beginner learns the basics and wants to build something more complex, the drawing approach does not scale effectively.

Therefore, programming for the masses requires a programming language for the masses. Star Script is created to meet the challenge. Try it out and share your thoughts!