skysight-inc/HackerNews huggingface dataset:
You would add a variance (P), estimate of the value and the timestamp of the last measurement. Using the last timestamp you can calculate Q. Generally, the older the last measurement, the higher Q.

The calculation is straightforward once you let some things be the value of identity:

P1 = P0 + Q
K = P0 / (P0 + R)
x1 = x0 + K * (z - x0)
P1 = (1 - K) * P0

Now you have the new score for your data (x1) and a new variance to store (P1). Other values are:

x0, P0 - previous score, previous covariance
Q - Roughly related to the age of the last measurement. Goes up with age.
R - Measurement error. Set it close to 0 if you are sure your measurements are always error-free.
z - the most recent measured value.

Let's say you measure number of clicks per 1000 impressions. Now you can estimate the expectation value (x1) for the next 1000. After the second 1000 re-estimate again.
Like many things in machine learning, this is a simplified version of Metropolis-Hastings.
The day an American realizes that there is a world outside the US where governments actually do good for their people is the day that they get a clue.
Two observations:

- X-FRAME-OPTIONS: IMO, more people should know about and use this.

- Adroll: Would be much more effective if it didn't keep showing me ads for products that I already use. I wish it had an opt-out so I'd quit seeing the same ads over and over again everywhere I go online.

P.S. I know others balk at the pie charts (for good reason), but for me it's irrelevant. I go straight for the numbers and the charts add a nice visual break so that it doesn't look like a wall of text. So at least they have that going for them. :-)
It will adjust itself in the sense that while it is still enabled and testing (a suboptimal state for your product), it will let your product perform better than plain old A/B.

At some point you still step in and decide based on the data, especially if you detect degenerate cases, and move on to the next experiment.
I don't know about that, but I'm beginning to suspect the whole central nervous system idea may have been misguided.
Cash-strapped startups can get the software for free (for a few years) via BizSpark (http://www.microsoft.com/bizspark).
New Ad Model for Facebook
that's awesome. HNers: does anyone know when (if?) the sdk will be public? & free?
First you need to understand how your users use your existing site. Bit.ly, for example, didn't do that - to assume that someone who plugs in a string of text to get a shorter one would be interested in a social overlay on top of that is retarded. That's similar to turning a photo blogging site into an e-com poster outlet. Sure there's an overlap, but the change is effectively a gamble.
Are you really good at programming? (Rails, NYC, YC S11)
We're a consumer-facing music startup, a top 300 website in the world in terms of traffic (and recently, somewhat interestingly, the largest implementation of the spotify play button on the web)

For a product with so much traction, we have a very small team (the technical team is at 4 people right now). We only hire really really brilliant people (so you'll have talented collaborators), and we pay accordingly (in terms of $$, lifestyle, freedom, etc.)

Our stack is pretty standard Rails, Javascript, jQuery, Git, Heroku, etc.

If you're really REALLY good, hit me up at hugememe@gmail.com with a link to something(s) you've built and any other online presence you're proud of (blog, stack overflow profile, whatever)
Someone has to admin the systems online as well as the networking.
Well, we're making progress. Someone bothered to put "repost" in the title.

The next step is to not submit the article at all. Then we will be truly enlightened.
Facebook Promoted Post Pricing is Variable
The Kalman filter is much more sophisticated. Typical re-estimation will be:

x1 = x0 + alpha * (z - x0)

where alpha is static. The Kalman filter will make it dynamic, taking into account how you obtained the measurements, how old the last re-estimation was, how noisy the process is, etc. Want to do multi-variate analysis? Make alpha a matrix transform.
Do elaborate on the frequently part.
Try wolfram alpha/siri for that one. No way they'd figure out how to do it on a calculator.

Having said that I kind of envy your Indian schooling, that's some important information right there, and I've learned a lot of it over time for my own projects.
So Chromebox is Mini-ITX, or is it smaller?

I sure hope this inspires other companies to release more smaller desktops. I don't see any reason why we should have to keep lugging around giant boxes anymore.

And actually you can get very powerful systems in Mini-ITX now, doesn't have to be bargain-power like these Chromeboxes on Amazon. Although dual-core is probably more than enough for most things.
Change For Life By Changing Your Habits
Pedantic note: #^ for metadata has been deprecated for at least 2 if not 3 versions. ^{ and ^:x aren't special. It's just ^ (reader metadata symbol) followed by a map and keyword respectively. Other things can also be metadata (for instance you can tag something with a classname to indicate a type hint).

You also missed out a few of the syntax quote stuff.

So, other tokens are #{} ^ #() #_ #'x ` ~ ~@

Full details: http://clojure.org/reader
$30 a month for business customers if they'd open it up to the general public. And with a few meg of free 3g.. I can imagine that taking off nicely.

I'm waiting for them to get rid of the 3 unit minimum.
Will it ever be distributed like a linux distro?
I'm not talking about me,I'm asking where the people you know that regret having kids got the idea that they should have kids. It's the default stance in most societies - yes even in 2012. I have heard it from a lot of people and strangely enough I hear it on HN every time someone says they don't want kids or think they aren't worth having. Inevitably when someone says that there are those who clamor in and have to say that having kids is the best thing in the world. My question to you is why did you feel such a strong need to respond? You didn't have to respond but you did - why?
Three different prices and three different estimates of total reach for a promoted post on the exact same Facebook page.
Can I get this in Ruby, please? :)
I always liked the Velomobile concept.

http://en.wikipedia.org/wiki/Velomobile
This is a nice infographic, but it doesn't explain why they prefer Angel Funding. It's just throwing statistics out there without explaining them.
What would be the benefit of using this over something like ZeroMQ?
Raspberry Pi case - coming soon, we'll release it this…
Pattern-matching is not sugar over "case".

Pattern-matching means that the branching primitive not only dispatches to different code based on an input tag, but also that it places different values of different types in scope according to the branch.

Most languages only branch on booleans, without gaining any type information at all. This is actually a big problem and relates to the nullability problem, explained at: http://existentialtype.wordpress.com/2011/03/15/boolean-blin...

For example, in C:

switch(ptr) {
case NULL: ... handle null case ...
default: ... use ptr as if it weren't NULL ...
}

This is unsafe -- because nothing prevents you from using ptr in the "NULL" case, and the compiler does not give you anything in the non-NULL case.

In Haskell:

case ptr of
Nothing -> ... can't use ptr as a value here,
it's wrapped with Maybe ...
Just x -> ... pattern-matching gave us "x" of
the correct type.
We can now safely use it.
Once a month or two, depending on season.
That is a needless and horrible infographic.
Good project managers are rare but such regimentation can stifle the free flow of ideas if the PM is not careful. The good ideas come from nature and leisure, not from where the Deadline looms.
Actually, it's not so cut and dried. I don't have a formal reference to hand, but this is discussed in the last chapter of Stumbling on Happiness - I can dig up the reference if required. Basically, what seems to happen is that having kids leads to many really extreme experiences - first steps, first words, as well as the sort of terrible experiences talked about in this article. We tend to remember these extreme experiences, particularly the good ones, much more than washing nappies every day, and that leads people to report a level of happiness that isn't borne out if you get them to record how happy they are at random times on random days where they're much more likely to be washing nappies.

None of which really matters, of course. If you want kids you'll probably love having them, and if you don't you'll probably be happier without them.
The way it's detecting Django (checking for the Django CSRF cookie) is false-negative prone. For example, our site (crocodoc.com) uses Django but is not registering for it; probably because we don't have any forms on our homepage so no CSRF cookie.
Isn't this exactly what nowjs does?
The US is presently doing a lot to switch over to natural gas, which has a lot less carbon-per-kWh than coal. If that's what they have in your area, the figures look better. Also good for the figures: if you happened to be doing your charging off-peak such that you're not actually adding to the emissions that would otherwise be emitted by idling power plants. (Or if you live in an area with good hydro/nuclear and the like.)

Of course, that's not really transparent to the electricity user in most cases.
I'd most compare it to yoga I suppose. You're in a weird position, its really hard on your wrists as you're putting a good bit of weight and pressure on them. Lots of precise muscle control, as small movements of your head even can direct your motion. You're being hit constantly with wind, and your muscles tense up a lot. Also, its very hot (or sometimes very cold) frequently. Not 'exercise' as much as abuse and strain.
Cheap chanel bags
What is the ratio of customer types itself? Reading, this, I wonder

1-If the are just 7x more people in the Personal bucket. (I'm guessing you account for this)

2-If there are so many more in the Personal bucket that it is still the primary driver of your revenue, so that is why you keep it?
A lot of the reasons for which this algo can optimize in the wrong direction have been covered here. In general terms, I agree with all of it.

I am a big fan of two techniques that I feel would enhance an approach like the one suggested: FIR filters and Decay.

Simply put: I believe it is important to have a mechanism through which decisions are not made too quickly. A finite impulse response filter would take care of this very well.

In addition to that, older measurements should not carry the same importance as nice-fresh data. Who cares what people thought about the buttons (or whatever) a month or two ago? The crowd visiting the site this week could have been affected by solar flares. Maybe they prefer something else.

Obviously you need enough traffic to be able to use such techniques.

Not sure it's worth the complexity in all cases.
A karma 16 account with some fast and wrong insults. It is old enough not to be green colored. Yet another language war troll account on HN.

Edit: I'd guess the troll's main account votes the troll posts up... maybe a heuristic can be made for the HN algorithm?
http://img.diytrade.com/cdimg/425436/9396978/0/1245127440/10...

???
I have a chromebook and a MacBook Air. Both are ultraportable and I use the macbook air because I can actually do something other than just run chrome in it all day. I heavily use google apps but my MacBook Air is much more useful. My brother has a chromebook and all he did was install ubuntu on it.
I think what cletus is getting at is that the orchestrated IPO pop has become SOP for tech IPOs, and it's nice to see it fallible for a variety of reasons:

0. Keeps people guessing.

1. The company got most of its IPO market value, instead of having a portion extracted by Wall St. insiders.

2. The 'bubble' got popped early, which is probably a good thing for most everyone but Wall Street insiders.

3. Wall Street's ability to orchestrate asset bubbles, whether coordinated or purely emergent, and profit off them at the expense of potential crashes and financial crisies later, just took a hit.

4. There's less or no irrational exuberance this time around. The market may actually have learned from the 2000 and 2007/8 crashes.
Being functional in nature, Loop doesn't have any of the baggage of the host platform (Java)

I don't see much that's functional in this language, but this statement made me laugh. It looks like a lot of Java's baggage is still alive and well in this language, like exceptions (quite un-Haskell-like)
There's always the excellent PR opportunity.
Libraries Grapple With The Downside Of E-Books
If you don't like it, don't buy it.
I personally think the Chromebook is more useful in both education and business than an iPad. Although perhaps not as useful as a slate might be (but those will cost >$1000 give or take and Windows 8 is looking to be maybe not as good as people were hoping).

What if you lose or break your computer - something that happens all the time in schools - with a chromebook it doesn't matter, just login to another one. In businesses, the chromebook would require virtually zero IT overhead. What if you don't want to spend extra on overpriced apps with less functionality than free ones in the browser (like Pages vs. Google Docs + Google Cloud Print) What if you actually want to quickly type up documents/code without having to pay an extra $60-$75 for a keyboard?

It's $550 for a 3G chromebook, compared to $629 for a 4G or $529 for a 3G ipad. Pretty comparable - not to mention the firmware on the chromebook is open so I would expect to see people running ubuntu or android on these devices, too.
I agree, and it neglects the fact that Angels fund seed rounds, whereas VCs are more suitable for the big bucks.
Find better problems
Reloop All The Blocks [in Emscripten]
For those who haven't used it, Google Webmaster Tools provides better keyword and search analysis than Google Analytics does. It's a great tool set.
I find it easier to live knowing my life is pointless. Takes the pressure off :)
Developer deal: CodeBox, code snippet App for $2 only 3 hrs left.
"Downvoted for asking for evidence of claims"

How about downvoted for not reading the article?
More code coverage treemap fun
I don't think this is quite right, although I'd be delighted to be corrected. Clojure still has to deref the var in order to call the function, and afaik this happens at runtime (hence the fact that you can redefine a function in the REPL).
I'm more amazed by the fact that PHP tops there. I expected something like Python or Ruby there.
Django's Class-Based Views are not a mistake (but deprecating FBVs might be)
Steve Jobs and The Cloud by Dustin Curtis
Yeah, shorter but burstier workouts. Eg, no more than 30 minutes in the gym, but don't rest between sets or exercises.

Just push it as hard as you can without risking injury for 20-30m, then quit. Do that with high scheduling variance (one week do it 4 times, the next week 1 time, etc. Variance, not routine, is key). Combine with long walks (to work if you're not too far away), bike riding, anything to reduce your sedentaryness.

This isn't a body-building or triathlete program, it's just a healthy one. Don't think of working out in terms of deterministic, 1:1, input=output. Rather think of it terms of signaling your body in ways that trigger certain gene expression that leads to a healthier metabolism.

Read this book more details:

http://www.amazon.com/The-New-Evolution-Diet-Paleolithic/dp/...

Reviews:

http://www.thedailybeast.com/articles/2011/01/04/new-evoluti...

http://www.marksdailyapple.com/the-new-evolution-diet/#axzz1...

Author's site: http://www.arthurdevany.com/
[Python] Tuples aren't what you think they're for
Yeah, I recall an internationalization bug that required me to patch and build from source as well. Then again, it was pretty beta code.

I'll also add that I'm no fan of GNOME's bug-for-bug compatible reimplementation of the Windows Registry through gconf. At least the underlying data are slightly more accessible, but it's still a massive festering boil.

One system that I find works pretty well is WindowMaker. Configuration is through a set of textfiles, but most functionality is exposed through a pretty slick configuration utility. Since all of this is based on Steve Jobs's NeXT interface, I'm not overly surprised that it works pretty well most of the time.

When I configure a new desktop/laptop, I just port over the GNUstep directory. Every 6-12 months I may tweak a configuration setting, usually through the GUI utility. But if I want to I've got the full functionality exposed through files.

A realization I had a few weeks back is that GUIs are ultimately limited in their surface area and dimensionality. There's only so much functionality they can expose, and in any sufficiently rich interface, some stuff will be buried deeply, and inevitably, two configurations you'll want or need to tune together will be in utterly different branches of the config menus/interface.

With a CLI, all dimensions are uniform. If the interface is sufficiently broken, you can write a wrapper around it (a classic example is rlwrap, a readline wrapper around other commands, such as Oracle's utterly broken CLI SQL client). I'll frequently write one-off shell functions to put the argument I want to tweak at the end of a command line to make readline bash editing easier and more convenient.

Granted, this is power-user stuff, but it's what makes the shell environment so damned powerful and flexible.
A gay friend had a house warming party years ago and my wife and I turned up. We were the only straight people there out of probably 50 guests and I heard someone say "breeders" as we arrived. It took a second to get it and It didn't feel good. I felt more alien than the numerous times we have been overseas and not been able to speak the local language. And when I consider that the people there would all have had comments made against them at some point I had a slight inkling what life could have been like.
I just use chunky PNG for my image processing needs. ImageMagick is too bloated and contains features I don't really need. I call chunky to resize avatars and pictures uploaded once, and then use a delayed job to resize them into other formats that won't be needed immediately.
Pinochet also became president of one of the most popular football team in Chile: Colo Colo in 1984.

I also wanted to say that one of the center backs, Figueroa, is considered one of the greatest southamerican center backs in the history of football. He played in Santiago Wanderers from Valparaiso, Peñarol from Uruguay and International of Porto Alegre from Brazil.
The name is unfortunate, especially when the documentation sometimes omits to capitalize "Loop", which introduces even more confusion than there already is.
I can't believe this joke of a company raised $ to display infographics.
Thanks for that link! It has been 15 years since I read Catch 22 and I don't happen to own a copy right now.

Yes, that is exactly the section of which I was thinking.

I didn't intend my comment to mean that libertarian law approves of mercenaries or for-hire militaries (honestly, I'm not sure what "libertarian" law's stance on the topic is). I merely meant it as illustrative of the inherent problems associated with mercenaries, privateers, and rogue for-hire military forces to the body politic - that these forces owe their loyalty not necessarily to the nation, but to the highest bidder.

And, M&M Enterprises was not exactly a private subcontractor, as I understand it, but an international cooperative of soldiers who switched loyalty from their respective national forces to the cooperative for their own mutual benefit.
Simple Effect System in Rust
Makes sense I guess. Interesting that it's not a gif you mean? Using sprites means it has nothing else to load when changing animations, saves that jarring load.
A quick note on sigils: recently I have been thinking that the dollar sign sigil could be used to denote place forms such that $_ is the top place form. Any place form could be cast into a function to be used on any object, for example you could use the place form $first on a collection like &$first(coll) and you could always set the value of a place with something like setf($first, 1).

Inside any function $_ will refer to the argument of the function, so you could program without ever using named parameters like in Perl 5. A parameters list like ($x,$y,$z) will just create new place forms rather then variables. I think this would make for a pretty interesting programming language semantics. On the other hand, I don't see much use for the @ and % sigils because I just consider lists to be structures with numeric places and maps to be structures with general places, so I actually prefer PHP style sigils.
Moving Mutability Into the Type
50 bucks gets me further than a "business-guy" co-founder
I think an analogy would be with the 9-11 "truthers" who trot out various facts and conclude that the towers were brought down by demolition charges rather than the plane strike.

Their facts are not wrong, they are just misapplied and someone with a more general understanding of physics knows that.

One of the facts quoted is that jet fuel doesn't burn hot enough to melt steel. By itself, that is true. But the temperature at which jet fuel burns varies depending on all sorts of conditions, and the standard lab setup is not at all what the towers were. For example, fuel in a jet engine certainly burns hot enough to melt steel, it's the limiting factor in jet engine design.
Right but Microsoft would have been first right?
Oh wow. Great move for both parties.

Every time I look at the game closure site it looks more impressive.
False... http://blogs.wsj.com/marketbeat/2012/05/29/facebooks-stumble...
"Maybe the secret is to confine your community to a small enough niche that the trolls are never attracted?"

Seems so. Most of the best subreddits (imo of course) are niche communities.
I submitted that 1 month ago - http://news.ycombinator.com/item?id=3903705 - and my nick ranit8 has been killed.

I found a possible reason yesterday, it was a duplicate of http://news.ycombinator.com/item?id=3699293

Damn, you are dead since 3 days thanks to this: http://news.ycombinator.com/item?id=4027951 . And you are much more active than I am.
> Polymorphism in this instance is simply allowing you to call the same function with an integer and string respectively.

Er... no, that's not polymorphism, that's overloading.
Am I misinterpreting the data when it says Avg. Angel income of $90K and Avg. net worth of $750K since that would make the "Avg." angel in their list a non-accredited investor and hence not an angel from who you should raise money since you will lose your Reg-D exemptions. The min requirement for an Accredited investor is a minimum annual income of $200K (or $300K with spouse if married) and/or a net worth of $1million not including your primary household.

Link: http://www.sec.gov/answers/accred.htm
Link2: http://en.wikipedia.org/wiki/Accredited_investor
Those numbers seem awfully low, especially for the Bay Area. You could make $11-13 flipping burgers at In-N-Out with a lot less stress and more free food.
How To Make Great Coffee at Home
For the business market, a Chromebook pays for itself in software licensing, maintenance, and other savings vs. Windows, every year.