skysight-inc/HackerNews huggingface dataset:
Garbage collection in file systems? There's quite a bit to read.

Lets stay on subject though:

http://en.wikipedia.org/wiki/TRIM

"Because of the way that file systems typically handle delete operations, storage media (SSDs, but also traditional hard drives) generally do not know which sectors/pages are truly in use and which can be considered free space. Delete operations are typically limited to flagging data blocks as "not in use" in the file system.[5][6] Contrary to, for example, an overwrite operation, a delete will therefore not involve a physical write to the sectors that contain the data. Since a common SSD has no access to the file system structures, including the list of unused clusters, the storage medium remains unaware that the blocks have become available."
Actually I think his analogy with city buildings is perfect:

One of the main things design does for people is make things inherently familiar to them. Apple is the canonical example: who reads the instruction manual for an ipod? NYC's grid system makes it easy to decode the city, much in the way that a layout's grid system makes it easy for the eyes to quickly decode and separate the information.
http://en.wikipedia.org/wiki/List_of_algorithms

This site is probably has a more extensive list, but it seems to be down right now: http://www.itl.nist.gov/div897/sqg/dads/

Google's cache of it is only 2 days old, so it's probably temporary.
The CS department rejected someone with a 3.7 GPA. I have a 3.4 GPA and scored so high on the AP exam I was exempted from both introductory courses. Their "standards" are exactly the problem here - I'm learning a lot from all of my classes simply by reading a textbook I can check out from the library, and I've taught myself everything I know about programming. Why should I subject myself to unreasonable standards for no benefit? Leveraging a situation only benefits you if it doesn't waste your time.
Don't get cover letters very often, but I always read them, and they do make a big difference; they tell me whether someone's merely sending their resume to every job they can find without much thought, or if they've thought hard about and are invested in this job in particular.
I would happily pay for this if it allowed me to check the tone of any text. Limiting it to emails (and only in outlook) seems extremely artificial. I write text to lots of people, for lots of reasons; is there a special property of email that makes it easier to computationally identify tone?
Crush Notifier, From The Makers Of Breakup Notifier, Finds Mutual Crushes
I can only speak for the developer position: we're pretty flexible on experience. Reading HN wins you one point in my book. :)
The grid is not a scaffolding or framework, the gridded structure is to help the reader's eyes decode and separate information.
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I promise you that won't ever happen with Crush Notifier.
I don't quite understand with some of the commenters: why do you guys talk about caching immediately as if your app needs to scale from the ground?

Isn't the point of GAE is that it scales (as long as you don't do stupid queries)?

If we have to put everything in memcached, what's the point of using GAE?

I also don't quite understand the push of using memcached for almost everything (especially for young startups). How do you handle data integrity? I'm guessing most data models of young startups are fairly simple and only contain at most 10 models with almost no relationship? Otherwise data integrity is painful.
Nice post! I especially like the concept of Lazy Money. It describes what a stable situation is like. (Having a position which inspires true confidence would be a healthy situation.)
It's also just a lot easier for them to only support their own hardware configurations. Not having to adapt drivers for and test n-thousand configurations per component makes it faster, cheaper and easier for them to roll out support for new tech.
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Maybe they want to attract the huger-still number of developers who aren't flocking to iOS. It's obvious they won't get the rock star developers, but there's a lot more non-rock stars. How is the experience on Windows?
In most situations, I definitely concur. There are a few cases where I've had to process >10g flat files and I whipped up a specialized tool in C that could run through it nearly as fast as the disk could feed it.
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Can someone provide some enlightenment about why one would migrate away from GAE? I only ask because I'm currently building an a web application on GAE and am starting to look down the road, wondering if building on GAE will allow us to grow as a business in the ways we want to, or if there are some arbitrary limitations that will come to bite us later.

(knowing of course that we're more or less tied to Google's infrastructure and the GAE way of doing things)
Native applications and the App Store were introduced in iPhone 3G / iPhone OS 2.0, when iPhone was still far from being the bestseller it is now: http://en.wikipedia.org/wiki/File:IPhone_sales_per_quarter_s...
I removed /#!/ part in URL in OP. Went straight to article.
Glad to see you're able to quickly turn around the app into something new, even though facebook hasn't given you any reply.

One question: I'll need to spam the site to all my friends before I'd ever start seeing connections right?

If only 1 friend of Kevin Bacon's required 6 degrees is connected to me this might grow virally, but until then it seems I'll need to pass on the link.
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He works through an agency and has some skills that are rare (though not rare like diamonds...)
>Those greedy pigs have profit margins roughly the same as home improvement stores, textile-apparel clothing and slightly less than packaging and containers.

Except all of those things involve moving stuff around. Insurance is just bit flipping in the banks when you get down to it, paperwork at the absolute worst. They should be able to manage way lower margins, they're moving money on paper instead of goods. But they don't, because they're an entrenched industry which puts less competitive pressure on them.

However you're right in that soaking the insurance companies won't make up the gap. We need to get smarter and be more efficient. As a first step, why don't we just the other 6 members of the G7, since they deliver equivalent outcomes for much cheaper? I'm not a healthcare expert but the topline numbers say it all. Healthcare's killing us on all aspects of everyone's budget. There could still be a role for insurance companies, there is in europe.. let's just do what works.
What grid are you talking about? Are your eyes decoding 12 columns of information? Or is it just nice to have two things aligned with each other? I suspect it's the latter. And again, that has absolutely nothing to do with a 12 or 16 or xx grid.
Really cool display. Reminds me of http://www.padmapper.com. Would be really nice IMO if the various "price tags" or indicators were colored according to price... so expensive flights were colored red, cheap flights were colored blue etc.
Isn't the first thing that happens that the person who someone has a crush on gets a request by the application "crush notifier" that it wants access? And isn't the second thing that happens nothing, because the person doesn't give access to the semi-creepy app? (I've got ten other apps wanting access already...)
Maybe they crush on everybody (or only make/stay friends with people they have a crush on), but know that it's socially unacceptable to just admit that. There should really just be a "I'll take anybody" flag in the preferences.
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perl + CPAN and bash .
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nice swivel.
Not only that, but I have Foxit as my default pdf reader, and when I update Reader on Win7, it forces itself to become the default reader --- WITHOUT MY PERMISSION. This is just aggressively rude of Adobe.
Orkut has this feature built in right from the start.
Where/why/when did this trend start? I saw it first on Twitter and Facebook, then the Gawker family of sites, and now it's spreading to other media outlets like Ars here.
You could always set this up for its current purpose then use the information to power the other to bring it back from the read. If you don't mind breaking their terms of service at any rate.
Most banks and credit unions have a (free) electronic bill pay integrated into their online banking that allow you to pay bills to the kinds of companies that you listed. The bank typically figures out whether to send them a physical check, or handle it electronically.
I think in this reference they are not talking about storing live data in memcache, just copies of objects for faster access. So when you are getting the information about a user you check memcache first, if its not there look it up in datastore and add it to memcache. Then when the user loads a second page you can get the information directly from memcache instead of having to look it up again.
Ok, I know this post is a couple days by now, but if you want to read more the eternal debate that is the C++ programming language, check out this article: http://gigamonkeys.wordpress.com/2009/10/16/coders-c-plus-pl...

There's actually 2 Hacker News posts already linking to this article, so you can read the comments are posted there as well:
http://news.ycombinator.com/item?id=885482
http://news.ycombinator.com/item?id=2220917
This kind of feature is common in most banks that I have seen. Although instead of Twitter, its email and SMS.
1) Yep. My company moved to an HRD instance this week and our CS reps and customers have both noticed a significant difference in stability. That doesn't imply that it's perfect but to say that Google is ignoring the issue is completely false.
From a restaurant perspective, a cover letter can be the deciding factor before performance is proven. Some employers don't require them, but most will. Its your chance to show communication skills and possibly spark interest before your resume is viewed. I've read cover letters that have been so appealing, I only used the resume for contact information - GTV
This isn't about a defendant that "outfought" a P2P attorney, this is about a company that tried to mass-sue on the cheap and got a judge that saw right through it. There was a number of problems with the plaintiffs case, the civilian defendant just reminded the judge of what he wanted to do in the first place.
None of these features or fixes have an impact on my current work, but I'm glad to be using something that's being actively maintained.
OnLive was founded by Steve Perlman - one of the 3 co-founders of WebTV. Steve is the consummate Silicon Valley serial entrepreneur - brilliant geek, business guy, product visionary, cheerleader -- all rolled into one with a nice-guy personality to boot.

OnLive does some spectacularly clever things to perform so well; and it will continue to deliver better and better experiences without you needing to upgrade your video card or computer.

I can't say more (disclosure: I'm under NDA), but OnLive is <i>definitely</i> the Real Deal.
One more thing...some online postings don't reveal the company hiring, but, if they do, access their website, pick 2 points about their company that requires yours skills (if possible) and give your point of view as if you already worked for them, of course don't be negative, maybe even just compliment the situation. BROWNIE POINTS..
I think it all comes down to lack of polish. Even in the early days, the iPhone SDK was leagues above the Playbook SDK in terms of polish. My personal anecdote is that the tools only run on 64 bit Macs but I could find no mention of that in the documentation. It was not a big deal, but these things add up. The free Playbook offer will probably help more than a few developers look past these flaws and try it out.
Sounds like something you could have fixed with another, slightly randomized factor: "attention-span". Long boughts of straight flying would result in an increasingly large but seemingly random delay.

Cool sounding use case though!
You mean like Google?
Agree totally.

Setting up a VPS from scratch taught me a great deal, it's nice to be able to flip a switch and make all your mistakes disappear, and then have a new fresh canvas available.
Nobody's saying not to use jruby. You asked a question, I gave one answer.
I have a working solution for idonethis.com, a conceptual solution for "Epic Win!", and an additional insight to add to yours.

The working solution for idonethis.com is to simply set it as your browser's home page. I live on my laptop, and to a significant extent, my web browser as well. For people in this category, a browser's home page may have even more of an unavoidable visible presence than a wall calendar would, not to mention perhaps even a greater frequency of exposure. This also serves as a call to action, meaning that every time that one opens a tab to, for example, read a news site, they'll see their calendar first and have to consider whether reading the news is more important than the goals that they have set out for themselves. As a side-note, I have no bookmarks for any news or related sites, in order to force a view of the calendar.

One thing I can see being a solution for "Epic Win!" would be if it displayed its equivalent of the calendar as the iOS device's lock screen and home screen wallpaper. In this way, you simply can't avoid seeing it.

I've found that the key here is actually not in the unavoidability, the key here is reducing the effort required by greatest extent humanely possible. "Epic Win!", in its current state, fails because it takes effort, no matter how minuscule, to launch the app. Getting an automated reminder is great, but it still requires effort, again no matter how minuscule, to click into the body of the email to see the calendar. Using the browser home screen or iOS wallpaper approach means that you're always seeing your calendar as a side-effect of something that you were already doing, and thus itself requires zero intrinsic or additional effort.

Finally, I think you brought up a great point in that "not using an app hides away the shame of not using it". The practical effect of having to deal with that shame is that it increases the effort required, due to emotional reconciliation, which decreases the likelihood of the app being launched.

When you know that shame is unavoidable (since you'll see it as your wallpaper and/or browser home screen) you can no longer "ignore" the shame (e.g., ignore an email, don't open an app). The only way around not feeling the associated negative emotions is to just ensure that you're executing on the goals that you've set out for yourself.

This approach is also supremely motivational from the "carrot" perspective. Seeing your chain of successes, day after day, is profoundly self-affirming, addictive, and habitualizing. You'll get to the point, in a relatively short period of time, where there is simply no force on the face of the planet that will prevent you from continuing your streak.
Typhoon App Engine allows you to set up your own GAE compatible environment: http://code.google.com/p/typhoonae/

I never used it, but it sure looks interesting if your application doesn't fit GAE anymore or you want to make specific infrastructural adjustments. They support multiple different database/http/.. servers too.
I bought this book on dead trees a couple of weeks ago. I've been working through it.

The first third is a typical intro to Scheme - types, code as data, recursion, call/cc, etc., probably more thorough than most intro books, but also faster paced.

The remainder is a much-needed exegesis of R6RS. Every procedure and syntactic form in R6RS is explained, and many dark corners are probed.

There is a chapter of bigger examples at the end. I have not yet read those.
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This was the original app, the one that Dan the Hack copied and passed off as his own.
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Could you please elaborate more on the "narrow sweet spot".?
I would love to know which applications fit this sweet spot.
Prices dropped in Europe when air travel was deregulated in Europe. Right now, it is illegal for any non-US airline to operate any domestic stop within the US, so competition is much harder to come by (whereas in Europe, discount airlines can open freely). Add this to the fact that the US is big and doesn't have tons of hubs like Europe, and it makes sense that travel is so expensive. Fortunately, us US folk can get frequent flyer miles easily (hell I've earned over $5,000 of free tickets in the last year alone, without spending more than $200)

-M
Yes.

Yes.

Yes, in the form of an email.
The original article does point out a few reasons, but the way I see it is this: AE is great if you want to scale and your app can scale in the AE way. There is a sweet spot and the tools work pretty well if you're in that sweet spot, but if you stray outside that spot you don't have a lot of options. Even getting your data out can be difficult, making the "export data and start over" nuclear option difficult.

If you know what you're building and you want to scale it using the sort of tools AE provides -- i.e. the datastore, taskqueue, etc. all fits your app well -- it's quite good. And quite cheap; it's not really fair to compare per-resource pricing to AWS because on AE you'll only pay for what you use instead of paying for idle time on a server instance. But it definitely constrains what you can do, and also locks you to a single hosting provider. If you're still exploring what you want to do, that level of design and vendor lock-in can be a pretty severe liability.
Hah, my first search on Ryanair from London Stansted to Pisa one way was 20.99 GBP, or ~$34. Prices are still insanely cheap
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Doesn't this already exist? I remember having seen something like this years ago.
This project looks promising. Could be a good basis for a consulting business, taking apps that have hit some obstacles or design limitations on Google AE, and getting them running on TyphoonAE-based hosting with app-specific infrastructure customizations.
I think it's a bit rude to say it was stolen. It's a pretty obvious idea, and as the crush notifier author wrote in his blog post, he never expected it to get so popular, it was just a weekend hack project.
Yes, it was/is a standard way to collect a bunch of email addresses to be used for spamming people. (Not that these guys are spammers.)
Honestly, this is what people mean when they talk about passion or tenacity or being "an animal" (cf http://www.paulgraham.com/start.html ).

What they mean is that you've got a drive to succeed in the face of adversity. That when you encounter difficulty, you won't become disheartened and lose focus on your goal and instead browse reddit for the next 12 hrs (There's some irony in Y-Combinator being responsible for one of the biggest time wasters on the internet). That when faced with a problem you'll take it head on, or if it's more sensible find a way to go around it.

This is a concept that's both maddeningly simple and insanely challenging.
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That sounds very much like the debugging process in an open source project.
i would have thought that too, until he stole this today:
http://www.nydailynews.com/lifestyle/2011/02/25/2011-02-25_w...
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The one thing wrong about this critique is that it is a GOOD thing there is a charge for more apps on the app store. It stops the spamming that is prevalent on apple's platform. It should be free for the first 5 and then a charge after that.
I must be in it, because I have rarely seen a downside to using AE. Here's the nature of my apps:

1) Extremely simple or very flattened data-model
2) Few writes, TONs of reads (I peak at 150 requests/second every day)
3) The occasional DeadlineExceededError causes me little or no headache. For some people this would be frustrating.

Also AE is awesome as a CDN. The latency is very tolerable for static assets.
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"The controller" is ambiguous, as there are multiple things that go by that name. This is a part of what I was getting at.

So, if OS X always tries to reuse the "same blocks" doesn't that reduce the need for TRIM?
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How bad was the cost differential?
You say you were featured on TechCrunch, yet I can find no link to your article. Do you have any proof that he "stole" your idea?
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The problem with anecdotal evidence is that it makes you under the impression that you know something. If it were as harmless as it were useless, there would be no problem.
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Man Jerry Seinfeld is a freaking genius. I'm going to start doing this every day for multiple habits. Maybe a few different color markers for everything.

This article just changed my life.

Thank you!
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I wasn't clear. I meant: like the mortgage bubble, where money was being invested in junk (like CDOs & CLOs), this new bubble of junk (many VC-backed startups and their junk securities) will burst because of the bullish PE guys. Sorry for the confusion.
A bit off topic: all of my customers but one in the last two years wanted to deploy to Amazon Web Services. I find this odd, being enthusiastic myself about AppEngine (no paid work, but I host some of my projects with it and I have written a few articles on GAE).

Clearly, not every web app is a good candidate for GAE.

I have found objectify-appengine to be nicer to work with than the official Java data store APIs and I think it helps minimize loading request times.
ugh. Sorry about that. I cannot stand their new site.

http://lifehacker.com/#!5770297/make-time+wasters-less-appea...