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pixelperfect

351 karma · joined July 6, 2014

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pixelperfect··on Elements of Clojure
I think anyone who's an expert in any general-purpose programming language can find a way to parlay that into a job, since it's much easier for them to learn another language, but knowing Clojure doesn't help much for learning other JVM languages. My guess is an expert C++ programmer could pick up Java faster than a Clojure programmer.
pixelperfect··on Elements of Clojure
I think the Clojure job market is pretty good for senior developers but bad for junior developers. Anecdotal evidence, but I saw someone a few months ago who had an active Clojure blog, gave talks on Clojure, contributed to multiple interesting projects on GitHub, but was unable to find a job before literally running out of money and going homeless. That could just be a weird situation, but I almost never see any job listings looking for junior developers, and when I do, they tend to be in Europe/Canada rather than the U.S.
pixelperfect··on The U.S. economy is growing and using less and less stuff to do so
A large fraction of the population lives in growing areas, so the rising cost of real estate in growing areas is an extremely important factor, and on average it's been rising faster than wages for decades.
pixelperfect··on For Online Courses, Questions Over How Success is Measured (2014)
Also, taking but not completing MOOC shouldn't count as a failure. I've enrolled in ~8 courses on Coursera and never completed any of them, but I still gained a lot of value from what I learned in those courses.
pixelperfect··on Keybase and Stellar Partner on XLM Airdrop Worth $118M
This is an interesting/generous giveaway...

I'm not sure what to think about XLM. On the one hand, I am very pessimistic about all altcoins, but on the other, I am impressed with Stripe, Keybase, and the teams behind those products.

pixelperfect··on Jeffrey Epstein: Financier 'found dead in cell' in New York
Yes, but he was already on suicide watch. I would be interested in seeing statistics on how often prisoners succeed in committing suicide while on suicide watch.
pixelperfect··on Google Discontinues Hangouts on Air
That's actually the reason why I use Gmail instead of switching to a smaller email service - it's "too big to fail," I don't think Gmail will be discontinued for as long as Google exists, even if it became somewhat unprofitable, due to the outrage and class action lawsuits that would result.
pixelperfect··on Ask HN: Tech crowd – What are your ideas for solving gun violence using tech?
This isn't a problem that will be solved by technology anytime soon. There are more guns in the U.S. than people. Even if you had a perfect tracking system for legally sold weapons, there are plenty of people willing to sell guns illegally, just like there are many people willing to sell drugs illegally.

A shooter can keep loaded guns in his car trunk, park in front of an establishment, and run inside in 20 seconds. It will be a long time before we have AI that can identify and subdue a gunman within 20 seconds.

pixelperfect··on Ask HN: What currently makes you optimistic?
I recently read David Deutsch's book Beginning of Infinity, and it drastically increased my level of optimism. Summarizing it wouldn't do it justice, but I highly recommend reading it.
pixelperfect··on Building the New Twitter.com
If/when old.reddit.com stops working, I will overcome my Reddit addiction once and for all.
pixelperfect··on We can't get enough of audiobooks
> Unlike Audible, however, it's easy to game the system by subscribing and quickly unsubscribing.

You can do this on Audible without problems. I have an Audible library of 15 books that I accumulated over a few years through various promotions, never paying more than 33% the normal cost of a subscription.

pixelperfect··on Developers don't understand CORS
But for XHR only POST requests that meet a lot of constraints (defined here https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#Simpl...) will work, right?

Nothing with a Cookie header for example...

pixelperfect··on Developers don't understand CORS
I see what you mean, evil.com could still make a request that includes cookies, which is why we need CSRF tokens. But from my understanding, it wouldn't be able to do that in a XMLHttpRequest hidden on the page. It would have to be a request from something like submitting a form which would navigate the user off the page. Is that correct? Of course it doesn't make much difference from a security perspective.
pixelperfect··on Developers don't understand CORS
I thought the browser at evil.com would first send a pre-fetch request without the cookies, but not send the full request when it doesn't get the correct value from Access-Control-Allow-Origin in the response from banking.com.

I'll admit I may be one of the developers that doesn't understand CORS...

pixelperfect··on Developers don't understand CORS
I'm pretty sure you're incorrect - requests to sites different from the one you are currently on will not include auth data by default because of the same-origin policy. The auth data would only be included if the server that the request is being sent to responds with an Access-Control-Allow-Origin header whose value matches the origin the request was made from.
pixelperfect··on Clojerl – Clojure for the Erlang VM
Getting Clojure by Russ Olsen. It's the most recently published of the introductory Clojure books and imo the best written.
pixelperfect··on Matrix Methods in Data Analysis, Signal Processing, and Machine Learning
Thanks for sharing. I hope at age 83 I can be as mentally sharp as Gilbert Strang is.
pixelperfect··on Google Will Soon Let Users Automatically Scrub Location and Web History
Doesn't Google keep track of web history through IP/browser fingerprinting even if you don't use an account? And when asked about it they give vague answers about what information is being kept and for how long. That's why I switched to using DuckDuckGo for most of my searches.
pixelperfect··on Tesla sued in wrongful death lawsuit that alleges Autopilot caused crash
If I take the perspective of someone who isn't informed about the technology, I can see how they could think that the technology is safe and Tesla is putting excessive warnings because their lawyers want them to. I think superfluous warnings on so many products has trained people to take warnings less seriously.
pixelperfect··on The Notre Dame fire and the future of history
Long Now Foundation is thinking about the distant future, but as far as I understand the building phase of their current projects will be completed within a single generation.
pixelperfect··on GitHub Has Become a Haven for China's Censored Internet Users
I'm surprised Microsoft-owned GitHub hasn't started censoring yet. I suspect it's only a matter of time.
pixelperfect··on Overview of differential equations [video]
They actually have sponsored 3b1b in the past.
pixelperfect··on Ask HN: What are your best learning methods/hacks/tips?
Quantum Country is another great introduction to spaced repetition (and quantum computing!) [1].

One of its authors also wrote a great essay about spaced repetition [2].

[1] https://quantum.country/qcvc

[2] http://augmentingcognition.com/ltm.html

pixelperfect··on Andrew Yang and Pete Buttigieg Have Blown Up on Twitter, and in Betting Markets
With PredictIt there's a max bet size, so the manipulation would have to be spread over many accounts. Seems like a very high risk/reward ratio considering how many people would have to be involved, and considering most people don't know or care much about PredictIt.
pixelperfect··on Ransomware Infects 100K PCs in China, Demands WeChat Payment
I've heard this before but I created a WeChat account last week and didn't have to provide anything other than a phone number for a SMS verification code.
pixelperfect··on Sedans Aren’t Dead, American Sedans Are
Interestingly enough Donald Trump tweeted about this the other day:

https://twitter.com/realDonaldTrump/status/10677911017828311...

https://twitter.com/realDonaldTrump/status/10677926101804564...

pixelperfect··on Ask HN: Why is it harder to learn new things the older you get?
Are you sure it's because you are getting older, and not because of another factor like technology? There is growing evidence that the constant consumption of information e.g. on social media and mobile devices is negatively affecting people's ability to focus. In my opinion the only way to rule out that possibility would be to go several months without it, pretending like you live in 2005.

I know a psychiatrist who works at a university who said she has had many students tell her that they can't focus as well as they used to in high school. Since these students are in their late teens and early twenties, I doubt it is due to their age.

pixelperfect··on Bitcoin falls below $5,000
It seems to have widespread utility in countries with severe currency problems like Venezuela. But I agree, for countries with healthy economies, I don't see why crypto would attain mainstream adoption for much more than black market transactions.
pixelperfect··on Facebook Morale Takes a Tumble Along with Stock Price
Morale must be even worse when you consider that Facebook tries to only hire people who are enthusiastic about the product. I've heard people who don't use or don't show enthusiasm about the Facebook platform are screened out before hiring as "bad culture fit."
pixelperfect··on Introduction to Clojure (2013)
After a while the parens became something I enjoy having. I like being able to structurally edit code, and comment out paren expressions by prepending them with '#_', I feel like I can edit Clojure code much faster than JavaScript code.
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