skysight-inc/HackerNews huggingface dataset:
I think category theory is rarely essentially used in a first or second typical course on some topic in math. Once in a while if students can be assumed to have had a course in category theory, then it is more elegant and efficient e.g. simply to
show that some functor has an adjoint hence this or that limit is preserved, but to me category theory, except if it is the main topic of interest, is useful because it eases communication and allows you to quickly get some understanding of a construction that might look very "local" to some category that you are not familiar with. Unlike the person who created the cited notes, I think it actually can help understanding the things under study or the associated constructions, assuming sufficient command of category theory. I remember when I first understood the definitions of things like products, coproducts, push-outs and pull- backs etc. in my last year as an undergraduate. Suddenly, for many of the constructions from topology and algebra it became easier to remember them, how they were constructed and which properties they had. To me it is kind of like with design patterns, mainly I don't use them as tools picked up from my tool box when solving a problem, rather they simply allow me to communicate more easily and gives me another level of abstraction where I can reuse thinking I have done earlier.
Ayush Agrawal | Vishal Bhardwaj finds a producer in Ajay Devgan - Academia.edu
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Ask HN: How to find quality code for re-purposing?
Github and Google code has many open source projects, but most of them are just a few lines of code or abandoned.

Whenever I feel like doing redundant tasks (like signup and authentication flow). I look for code that is already implemented. But, I always have hard time finding them. How do you guys find, code to re-purpose and use in your projects.

Thanks.
Today a programmer was born. And you are my mother.
Today, I join your ranks. I am starting as the lowest of the low, but no one can take that my position from me.

I got a B+ in C++ in 2003. I read Why's Poignant Comic Book in 2005. I've followed web startups for years, and even played a business role in 2 of them. But it wasn't until 4:58am today, after a long night with fellow coders who helped carry me over the hill, that I wrest to myself the glory it is to be a programmer.

Proof?

I wrote a crappy program to help my friend Greg figure which trains are coming next at one of his Metro stops. Behold the breathtaking majesty: http://blazing-galaxy-7821.herokuapp.com/ If you figure out how it works, the FBI will add you to their potential X-Men shortlist.

And I'm on Github. Yeah, that's right. The Github. I have committed something: https://github.com/israelvicars/Over-The-Hump

I don't know what you think it takes to become a programmer. I don't care either. Most of you have forgotten more code after last night's bender then I've learned ever. But there are OTHERS who like me stared at the beginner computer manuals from O'Reilly. Stared and read and then got stuck. And stayed stuck.

I've been getting stuck on my own for years. YEARS, with a capital "Y am I a failure?"

My stack of programming books didn't get me there. They are still on my bookshelf. My top-billing university engineering education couldn't cut it. It gave me context but then left me at the alter. No, my friends. It took you. And your counter-parts sitting in this office with me tonight.

The programming community lifted this stray sheep out of the vast sea of Almost.

Thank you for your insightful comments and occasional threats here on HN. Thank you for bragging about that grossly complex web app you built over the weekend while I napped and played frisbee. Thank you to my mostly younger but way smarter programming compadres at the Code til Dawn Meetup I started in January to meet programmers in my community. Thank you especially to my buddy "exid3" for walking me through the endless bumps in the road that stood between me launching this app tonight and another evening of plodding through a tutorial.

And to those who wallow still in the sea of Almost, surround yourself with members of the programmer community. Set the right goal and don't give up. It may take years for you too. But damn it feels good to be a coder.
Posterous ended up de-emphasizing the email signup aspect of their service (it's no longer mentioned anywhere on http://posterous.com/ ) - I remember reading something about that decision somewhere, but I can't find it now.
I'm sure I don't know why this article reminds me of this, but totally off topic:
Does anyone else remember get rich quick magazines back in the day? They were tons of fun! Every page was full of possibilities. I remember as a kid trying to get into mail envelope ponzi schemes. It was all about how to figure out the scam and improve on it. Taught me how to love to hustle.
You should be very careful if you're selling something you don't have, you almost certainly violate the terms of your payment provider and depending on where you live you might be committing fraud.
I found the article to be hands-on, and a good insight in the MO of a successful entrepeneur. It doesn't have to take cutting edge technology or thousands lines of code to make it big. On the other hand, the majority of folks here are hackers, so maybe the article is barking at the wrong tree here...
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Anonymous homeless hacker 'Commander X' pleads not guilty
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4clojure is great:

- It starts very gentle but progresses quite rapidly.

- The problems are small and geared towards idiomatic functional programming, which is why I found it more useful than projecteuler for learning Clojure.

- There's also a neat code golf/comparison feature, so you can compare your solutions to others.
Interesting analysis. I think now Facebook has become when-AOL-bought-Time-Warner-big. As a new social network startup founder I'm happy about what Facebook released. We've launched before Google+ and then we saw G+ has bombarded with features and now FB. They both are becoming much more confusing. Everything for everybody.
>I guess it proves that the tools aren't everything.

Sort of, it proves that a psychotic mob of minutiae obsessed sufferers of Autism are capable of incredible productivity in spite of anachronistic tooling.

Cf. people that build houses using pre-19th century technology and refuse to use modern plumbing.
As an entrepreneur I really don't identify with this world of self-help books, overnight entrepreneurs, 10-point checklists to success and how to become a millionaire in a weekend.
Not sure the IPO is going to happen now, and if it does it could be at half that, or less.
Ask HN: Self employee or company? What would you start with?
Hi there,

I have a question that has been going back and forth into my had for a while now, I am working on one startup project, the thing is that I am quite close to finish it and I don't know what to do.

I am a self employee right now and my question is: Do you think people will get away from paying in paypal when they see my name in stead of Comany Name INC or LLC ?
I would prefer to use this account for now and once I get more customers to turn it into a real company, I would like not to invest money right now in creating a company, etc.

What do you think?
Will this work?
Should I get a company name?
Should I lunch and get some seed funding and then get a company name?

Thank you for your precious time
You shouldn't update the text of a petition people already signed.
What a fascinating site. It also could be used as an Apple advertisement (he said, writing on a MBP 17"). :-)
On the other side, Bing needs to bring more advertisers to their adcenter, to get higher ppc prices for higher revenues. Google benefits from much more advertiser presence as a result of search market share. Or if advertisers open up their ads using robads standards, bing and other Google competitors would have a higher monetization; see http://news.ycombinator.com/item?id=3022998 for rsobad
...or Drizzle.
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Am I the only one tired of single-purpose a/b-tested-to-death webpages that sell only one thing in loud marketing-speak?

I'm a businessman myself, so I'm glad someone out there is making a living for themselves, but I truly tire of these sorts of eyesore sites on the web.
Google also fails on standards
open graph still talks about web pages, sites, images, videos etc. none talk about a way to standardize ads; If we could make ads open and searchable on web sites, that would open a new era, far beyon schema.org or facebook opengraph. please see the discussion on robads, and open ads standard to make ads searchable and shareable on internet; http://news.ycombinator.com/item?id=3022998
I read it, I just presume people most users are linux based in here.
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It is against most merchant rules (and PayPal) to process a complete transaction without the product or service being immediately available.

For pre-orders, you can collect card information and authorizations, but you can only charge when the product or service is delivered. PayPal doesn't support that at all (it is messy)

Even with pre-orders the condition usually is that you need to deliver within 30 or 60 days (depends on the merchant).

It is definitely not a good idea to collect money with the promise of a product in the future. This is why Kickstarter, GroupOn etc. only charge cards later on, and make it clear to users with disclaimers.
They are not available in Postgres at the moment, but I believe that covering indexes / index only scans will be coming some time next year, as theres a patch that should hopefully go into the next release.

http://rhaas.blogspot.com/2011/08/index-only-scans-now-there...

http://archives.postgresql.org/pgsql-hackers/2011-08/msg0073...
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Taubau.ch is Makes as extensive equipment, which not only driving a boat and floating-efficient but also safe and comfortable, the variety of products used in the context of boat accessories.
I read this, and thought, it's GOT to be Timothy Ferriss. Sure enough, I see the site is fourhourworkweek.com, just after I've clicked the link.

My favorite line is in the photo caption: "He also looks great in orange." That may come in handy for him in the near future, if he's not careful.
You must not be familiar with Tim Ferriss.
I don't get entirley what he did to validate his idea for AppSumo. He got 200 new customers for imgur which pay 25$/year (to imgur) and he payed imgur 3$/user for this? Didn't he loose money then?
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Though it appears to be marketing his products(competition at the end) and its associates like shopify,appsumo etc, it is informative for a novice like finding ideas, customers, validating etc...Its worth a read
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NoSQL as a governance arbitrage
1. while true, PG has other features (e.g. partial indexes) which can make a big difference as well. Completely depends on the scenario. Sometime mysql will 'win', sometimes PG. No real reason to pick one over the other, unless you know that in your situation a particular feature is a real must-have.

2. use a connection pooler (e.g. pgbouncer), problem solved, good practice anyway, even with mysql

3. what (practical) edge do you see given the replication features in 9.1?
OpenBSD developers are autistic and psychotic?

Fuck off, and die.
Thanks. I think it's much more about that they all compete for your time and the same user base, rather than "Everything for everybody."
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That's like saying don't build your platform on AWS. You make educated choices and, if you're smart, you don't create complete dependency on someone else. But taking advantage of opportunities, even if for a short while, can be highly lucrative.
Starting a “professional” Rails 3.1 app with Web App Theme, Devise, and Kaminari
haha. It's my work address, which is pretty easy to find. The phone number is for the company that makes the pub glasses.
nitpick: Africa is a continent, not a subcontinent
Quoting the About The Setup page:

"Despite appearances, the site is not actually sponsored by Apple - people just seem to like using their tools. We're a fan, too."

However, I wouldn't be surprised if there was some selection bias involved. On the other hand, they sometimes feature such hardcore geeks like Russ Cox running Plan9 from User Space[1].

[1] http://russ.cox.usesthis.com/
You don't have to actually sell. If you don't have a product yet, just build a mock payment page and check how many people get to the end - and never charge them.
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I am shocked, SHOCKED, that there is yet another article at the top of HN which plays on pressed nerd rage.

If only there were some way to monetize with a loving helpful mentor who wishes nothing but the best for the most productuve years of my life!
The usage of CVS as the OpenBSD version control system comes up once in a while on the mailing lists (usually brought up by trolls or people new to the community).

Many OpenBSD developers are used to CVS and don't see a strong reason to change to another system. However, they are aware of the deficiencies of CVS, and OpenCVS is supposed to fix some of them. For instance, atomic commits was on the roadmap (but I don't think it is implemented yet). You can also regularly see commit messages complaining about problems with CVS.

I know some OpenBSD developers use Git locally to track their patches before committing them to the official repository.
All of life has been utterly, profoundly changed thanks to Facebook...
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Tools are just means to an end. The OpenBSD devs can write better software with punch cards than you can with a modern language. Take your hipsterer-than-thou attitude and shove it.

tl;dr fed the troll.
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No I think Noah got a $3 commission for each sale. So he earned $600 from selling 200 accounts.
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> Why not just use the plain English equivalent?

Because french is the language of the artiste. It's a tradition, a convention.
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Definitely Inspiring!!
Relax, there is no reason to get so worked up about a little trolling. Someone who just two hours ago told us that his favourite tools are emacs and a terminal emulator certainly doesn't have any weight in the anachronistic tool debate.

Most people are unaware of the OpenBSD workflow, and cvs commits are only the final step in it. There is little "active" development done with cvs. It's for the most part used to commit already reviewed patches. Plenty of developers seem to manage their patches with other systems, including git.
I believe he means in terms of it being a platform for development. So for instance as a platform for development it might be compared to a utility in which case you wouldn't expect the people that run your water or electric to shut those off because some manager at the plant was playing god. Whereas in Facebook's case this apparently has the potential to happen. Making Facebook a not so attractive platform.
The Netflix CEO (nigh unto) said this explicitly during his time on stage at f8: this wasn't some amazing revelation by NPR; he (Reed Hastings) called it something like an "outdated law" while apologizing why Netflix+Facebook would only be launching in 44 of the 45 countries supported by Netflix.
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Having personal talked with Noah, it makes sense on what he did or is asking others to do. I myself have ran and am running sites which bring in revenue. not on the $1MM scale but still some $.

+ replicating what AppSumo does is not that hard, you need a decent site with some deals on the page. The Deals you get by emailing entrepreneurs or devs of any product out there. There are many struggling devs and companies which would love to cut you a deal as far as they are getting sales and customers.
How to Create a Million-Dollar Business This Weekend (eg AppSumo)
Tell HN: please help flag spam in New
The New queue is getting hammered. Currently, about 30-40% of submissions from the last 2 hours are spam. That's just what hasn't been deleted yet.

Please spend a few minutes each time you check HN to prune the New stack and flag any spam.
Is this funny? Seems a bit pointless to me, but maybe no more so than any of the other schlock people are writing about FB these days.
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It's even worse on Google+[1], you don't just get a banner but get redirected to https://plus.google.com/not-supported/

[1]: http://news.ycombinator.com/item?id=3020920
unique usernames are needed for nice urls like youtube.com/user/johndoe, flickr.com/photos/johndoe, etc. that's what they are for.

from the examples above, flickr username url is optional and you can stay with the ugly one, that's probably the solution you're looking for, isn't it? now you must decide which use case is easier.
More than likely, the business is unhappy with the terms of the recruiter's agreement. These guys will do all sorts of things with contractors like add a 30% commission on top of your hourly fee and bake in a clause entitling the recuiter to a bonus equal to 20% of your salary if the company decides to hire you full time.

You will probably not be offered this position any way except through the recruiter.

My advice is to continue your search, and only work with embedded recruiters who are paid hourly or salary for their services. These recruiters will have corporate email addresses matching the companies they represent.
This video illustrates his progress much better then the original thread.

Could you do the same thing for this guy:
http://conceptart.org/forums/showthread.php?t=114449
You don't. That guy didn't.
suphappy - thanks for sharing your experience. Some of this was news to me. I wanted to kindly ask if it would it be possible to ask you a few other questions offline about your experience with the program. Any chance you could drop me a line at artsumo.com/about/contact?
There's also a very nice Sinatra app specific to open source repos on Github:

http://calendaraboutnothing.com/ (app)

https://github.com/technoweenie/seinfeld (source)
Cool idea and it looks really useful for printing out online tutorials/guides without all the ads/cruft - saw on your webpage that it's free so what's your revenue model?
In defense of CVS (which I personally wouldn't use anymore today), there's still a point to be made for being to able operate your VCS with only a handful of (mostly) unambiguous commands and having all of those exhaustively explained in a single man-page that doesn't fill a book-shelf.

Especially git has been doing a rather poor job at insulating the user from the immense complexity that the added flexibility incurs.

This is one area where our fancy new DVCS still have to learn from their ancestors.
I hate when they oversimplify entrepreneurship and pitch us all these easy 'earn 1.000.000$' schemes.
(especially when it's acompanied with ego-trippin')

I love when they demistify entrepreneurship and give some insight in how to start.
(especially when a concrete marketing advice is give)

Overall as with all posts on Tim's blog - they are generally great. Just, take them with a grain of salt.
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>his favourite tools are emacs and a terminal emulator certainly doesn't have any weight in the anachronistic tool debate.

That should've been your hint that I have an admiration for them and their project.
With large companies the bar is often as low as being able to reach a human at all.

Anyone ever try to report a bug to Apple? It's a black hole.
>The OpenBSD devs can write better software with punch cards than you can with a modern language.

I'm a coder that lives inside of Emacs and m-x shell. What about what I just said would make you believe anything other than that I consider the person to be more important than the tool?
I had a different experience. Medical school was easy, I was single and went out drinking / partying two or three nights a week. Not to be crass, but I did well with the ladies. Luckily I can get by on four hours of sleep or less. So, I don't feel like I missed out on much of the early twenties experience. Most of my non-medical friends had jobs and I didn't, but that was the only real difference.

Things got a little more serious my intern year, but I still managed to go out twice a week, and the nurses were much more responsive to my advances now that I was doctor.

At the start of my residency I got serious with a girl from my medical school. Her training was in Psychiatry and I was in Radiology. We worked a minimum of 80 hours a week, but we always had time for each other. We got married during third year.

Now I'm a partner in a successful practice, and she's taking a few years off to raise the kids. I make over 800k a year, and take 14 weeks of vacation. I don't deal with patients. I have the ultimate job security. And, I am a tremendous resource for my family. I'm sure you know how easy it is to get screwed by the medical system. That won't happen to me or mine.

I'm not a risk taker, so what else could I be doing with the security and benefits of my current job? Lawyer, maybe.
I should clarify. None of the tools for migrating my (rather simple) mysql database to pg work well or at all...

But on that note PgAdmin3 is pretty crap. At least on my mac.
The lesson I'm taking from this is be ok with slow progress and early failures. The trap I fall into is being discouraged too easily and giving up. What this guy has done is the opposite. He just kept going and got good.
Top Most Overhyped Tech Terms
Favorites here are:

"Advanced Persistent Threat -> Alarming people thoroughly"

"There is nothing that would make the anti-virus companies happier than mobile malware to bring their performance degrading, signature-based shakedown business to a smart phone near you."

"Twitter is the worlds largest manifestation of Skinners operant conditioning chamber with compulsive tweeting behavior driven by semi-random retweets & responses."

and :-)

"The biggest risk from the cloud is moisture"