Archive for September 2008

StackOverflow Podcast #20 05 Sep

This week's StackOverflow Podcast is up: episode 20.

We talked about the deadlock that was fixed, which was the last thing holding up the public beta... caused by a very small bug in third party libraries, which is exactly why I've always had a bias against using third party libraries. I tell an interesting story about why the Excel team had their own compiler. And I explain to a listener why Jeff never listens to me.

Thanks to everyone who came to the Business of Software conference and made it a huge success. The speakers were all incredible, the attendees were fabulous, even the food was pretty good for a convention center.

P.S. The Conversations Network, a not-for-profit organization which hosts our podcast, is looking for sponsors for their podcasts, including this one. It would be a very modest, NPR-style intro at the beginning... "The StackOverflow Podcast is brought to you by Gummy Bears, Inc., bringing fine chewy treats to grubby children everywhere." If your company might be interested in sponsoring the podcast and becoming a hero to developers worldwide, or at least the eight developers who listen to the podcast, please email me.

We're finally moving! 10 Sep

This weekend, Fog Creek is finally moving into the big new office space we've been working on since last March. These things take FOREVER.

The new office will be:

  • twice as big as the old office
  • in a better neighborhood
  • costing about 5 times as much in rent
  • with higher quality finishes
  • 50% more aquarium
  • a private marble-lined shower
  • and adjustable-height desks (for developer ergonomics, of course).

Also, thanks to Jeff Atwood, it will have Rock Band.

Today, the company came down to tour the construction site and pick offices.

Haworth didn't come through for me... their moveable walls take so long to manufacture that we're literally going to have to move in without walls and doors, which will arrive about 6 weeks late.

The new kitchen:

I'll have more detailed pictures for you once we get moved in.

Stack Overflow Podcast #21 11 Sep

Episode #21 of the Stack Overflow Podcast is up, in which Jeff and I talk about the anthropology of abusive users. “You’ve got a bunch of people playing Chess, but certain people want to play ‘throw the chess pieces all over the park...’”

The site itself goes live Monday.

Password management finally possible 11 Sep

Now that DropBox is shipping, there's finally a good way to manage all your passwords. This system works no matter how many computers you use regularly; it works with Mac, Windows, and Linux; it's secure; it doesn't expose your passwords to any internet site (whether or not you trust it); it generates highly secure, random passwords for each and every site, it's fairly easy to use once you have it all set up, it maintains an automatic backup of your password file online, and it's free.

  1. Sign up for DropBox (note unfortunate URL: getdropbox.com). This gives you a folder on your computer that can, magically, be synchronized onto every computer you use. Whenever you change a file on one computer, the change is automatically propagated to your other computers.
  2. On all your Windows computers, install PasswordSafe. This is a little program that maintains an encrypted password file for you for all the sites you visit regularly. It will even generate long, complicated passwords full of special characters. The file itself is encrypted... if someone gets their hands on it, it's worthless without the master password you created for it. Store the file in your DropBox folder, of course.
  3. On all your Macintosh and Linux computers, install Password Gorilla. This works just like PasswordSafe and uses the same file format.

That's really all there is to it. There is one optional step:

  1. Log on to all your bank accounts and change that "abcd" password to some long 16 digit, unique, secure password that PasswordSafe makes up for you.

 

Stack Overflow Launches 15 Sep

You know what drives me crazy? Programmer Q&A websites. You know what I’m talking about. You type a very specific programming question into Google and you get back:

  • A bunch of links to discussion forums where very unknowledgeable people are struggling with the same problem and getting nowhere,
  • A link to a Q&A site that purports to have the answer, but when you get there, the answer is all encrypted, and you’re being asked to sign up for a paid subscription plan,
  • An old Usenet post with the exact right answer—for Windows 3.1—but it just doesn’t work anymore,
  • And something in Japanese.

If you’re very lucky, on the fourth page of the search results, if you have the patience, you find a seven-page discussion with hundreds of replies, of which 25% are spam advertisements posted by bots trying to get googlejuice for timeshares in St. Maarten, yet some of the replies are actually useful, and someone whose name is “Anon Y. Moose” has posted a decent answer, grammatically incorrect though it may be, and which contains a devastating security bug, but this little gem is buried amongst a lot of dreck.

Well, technology has gotten better since those discussion forums were set up. I thought that the programming community could do better by combining the idea of a Q&A site with voting and editing.

Would it work? I had no idea. And it looked like there was no way to find out, because everyone at Fog Creek was really busy so nobody had any time to build this.

Then, out of the blue, Jeff Atwood called me up. His own blog, Coding Horror, was starting to rack in the dough, and he was trying to figure out if that meant he could quit his day job and just blog.

Pattern-matching rules fired in my brain. The hardest thing about making a new Q&A site is not the programming—it’s the community. You need a large audience of great developers so you have the critical mass it takes to get started. Without critical mass, questions go unanswered and the site becomes a ghost town. I thought the combination of my audience (#15 on Bloglines) and Jeff’s (#89) would bring enough great developers into the site to reach critical mass on day one. So Jeff and I decided to go in together on this.

We’ve been working all summer to build the site. OK, that’s extremely unfair. Jeff Atwood, together with two of his friends, Geoff Dalgas and Jarrod Dixon, have been doing most of the building. I just chime in with advice once in a while, which Jeff justifiably ignores; you can hear the process in our weekly status phone call, publically available in the form of the Stack Overflow podcast.

In the beginning of August, the beta opened to a small group of just a few hundred developers. The site lit up instantly! People were asking questions and, for the most part, getting answers! And the voting was working too… in most questions, you could see that the best answers were voted up promptly. I tried to ask a programming question for something I was working on and found that (a) it had already been asked (b) there were already good answers and (c) the search engine worked so well I never got a chance to post my question.

After a very short, five-week private beta, we’re opening Stack Overflow to the public today.

Here’s how it’s supposed to work. This is a community project, so I’m being careful to avoid saying this is how it will work… that’s up to the community. But this is roughly what I have in mind.

Every question in Stack Overflow is like the Wikipedia article for some extremely narrow, specific programming question. How do I enlarge a fizzbar without overwriting the user’s snibbit? This question should only appear once in the site. Duplicates should be cleaned up quickly and redirected to the original question.

Some people propose answers. Others vote on those answers. If you see the right answer, vote it up. If an answer is obviously wrong (or inferior in some way), you vote it down. Very quickly, the best answers bubble to the top. The person who asked the question in the first place also has the ability to designate one answer as the “accepted” answer, but this isn’t required. The accepted answer floats above all the other answers.

Already, it’s better than other Q&A sites, because you don’t have to read through a lot of discussion to find the right answer, if it’s in there somewhere.

Indeed, you can’t even have a discussion. A lot of people come to Stack Overflow, not knowing what to expect, and try to conduct a discussion when they should be answering the question. The trouble here is that answers are always listed in order of votes, not chronologically, so the discussion instantly becomes scrambled when the votes start coming in.

Instead, we have editing. Once you’ve earned a little bit of reputation in the system (and there are all kinds of ways to earn reputation), you can edit questions and answers.

Fred asks: How do I keep from overwriting the user’s snibbit?

Kathy answers: Normally the user’s snibbit will not be overwritten. Are you enlarging the fizzbar?

Fred answers: Yes. And it’s getting overwritten.

BZZT! WRONG! Fred just made a mistake… he provided an answer which isn’t an answer. VOTE IT DOWN!

Chastised, Fred edits his original question, changing it to: How do I keep from overwriting the user’s snibbit while enlarging the fizzbar?

Now Kathy can answer by editing her previous answer. And you’re left with a nice clean single-question, single-answer, instead of a lot of boring discussion that would be unnecessary flotsam to the next person to come along with snibbit overwriting problems.

There are lots of good ways to edit things. You can improve spelling, grammar, and even copy edit any question or answer to make it better. After all, for the next 20 years, this question will be the canonical place on the web where programmers will come to find out about enlarging fizzbars without overwriting snibbits. Anything you can do to clarify, explain, or improve the question or the answer will be a public service. If there’s code in the answer, you can debug it, refactor it, or tweak it to make it better.

You can also improve on the answers. If an answer is incomplete, expand on it. If an answer has a bug in it or is obsolete, you can edit it and fix it. Because Q&A in Stack Overflow are editable, you can safely link to a Stack Overflow permalink knowing it will always have a good answer. Stack Overflow won’t have the problem of other sites where obsolete or incorrect answers have high Google PageRank simply because they’ve been on the Internet for so long. If someone finds a security bug in an answer, it can be fixed… it won’t keep coming up in Google’s results for years and years poisoning future code.

Want to know an easy way to earn reputation? Find a question somewhere with several good, but incomplete, answers. Steal all the answers and write one long, complete, detailed answer which is better than the incomplete ones. Sit back and earn points while people vote up your comprehensive answer.

In addition to voting on answers, you can vote on questions. Vote up a question if you think it’s interesting, if you’d like to know the answer, or if you think it’s important. The hot tab on the home page will show some of the highest-ranked recent questions using an algorithm similar to digg or Reddit. If you’re generally interested in programming and want to learn something new every day, visit the hot tab frequently.

Want to test your knowledge? Visit the Unanswered tab. Right now, you just see a list of questions with no answers (and there are very few), but in the near future, we’ll actually tailor the list to show you questions that we think you have a chance of answering, based on questions you’ve successfully answered in the past.

We have tags. Every question is tagged so, for example, if you’re a Ruby guru, you can ignore everything but Ruby and just treat Stack Overflow as a great Ruby Q&A site. A single question can have multiple tags, so you don’t have to figure out which single category it fits in best. Like everything else, the tags can be edited by good-natured individuals to help keep things sorted out neatly. And you can have a little fun: stick a homework tag on those questions where someone seems to be asking how to delete an item from a linked list.

Don’t combine multiple answers. For example, suppose someone asks

What are your favorite keyboard shortcuts in Emacs?

Well, I could list them all in one answer, but how does anyone vote on that? Instead, I’ll provide a bunch of separate answers, and let people vote on the answers. And in fact, if you see a question which is really a poll, do me a favor, go in there and edit it:

What is your single favorite keyboard shortcut in Emacs? (One shortcut per answer, please).

What kind of questions are appropriate? Well, thanks to the tagging system, we can be rather broad with that. As long as questions are appropriately tagged, I think it’s okay to be off topic as long as what you’re asking about is of interest to people who make software. But it does have to be a question. Stack Overflow isn’t a good place for imponderables, or public service announcements, or vague complaints, or storytelling.

I’m extremely excited about Stack Overflow. It’s fast and clean. It costs us practically nothing to operate, so we won’t need to plaster it with punch-the-monkey ads; we plan to keep it free and open to the public forever. And it might make it a little bit easier to be a programmer.

Stack Overflow Podcast #22 19 Sep

In Episode #22 of the Stack Overflow podcast, Jeff and I talk to guest Josh Millard of MetaFilter about moderating community sites.

Imaginary product 20 Sep

Why doesn't somebody make this?

  • It's a power strip
  • It's a network hub
  • It's a USB hub
  • You clamp it onto the back of any desk

This would make it easy to plug in laptops, USB peripherals, and all your rechargers at your desk without crawling around on the floor.

(The photograph shows a product by Mockett which comes tantalizingly close, but which has knockouts for you to hardwire your own ports instead of built-in LAN and usb hubs.)

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