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pixelperfect

351 karma · joined July 6, 2014

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pixelperfect··on Anki-fy your life
I find there's a sweet spot for Anki when the daily review of already-existing cards takes 20 minutes. If the daily review takes more than 25 minutes, I try not to add any cards that day.
pixelperfect··on Ask HN: Improving or even curing Myopia (Nearsightedness)
see also endmyopia.org

I haven't looked into this deeply because I don't have severe myopia, but seems plausible to me that this really works for a lot of people.

pixelperfect··on A from-scratch tour of Bitcoin in Python
The legislation that made Bitcoin legal tender in El Salvador does not legislate the use of Strike. Businesses can use whatever system they want, as long as they can accept payment in Bitcoin. Strike is providing a service that allows any business to take Bitcoin lightning payments and have them automatically converted to dollars, for businesses that do not want to hold Bitcoin. It's not fair to just call this a "sql database" because it's connected to an open payment network and the customer can use whatever means they want to pay the business, even if the business decides to just uses Strike.
pixelperfect··on Square buys $170M worth of bitcoins
not sha256
pixelperfect··on SlateStarCodex Is Back Up
He claimed that they would "show where he lived," not necessarily publish his address. I don't believe the Times would publish his address, but I do believe they might put enough information in the article to make it easy to figure out.
pixelperfect··on Bitcoin is more like ham radio than the early internet
The world reserve currency can collapse without all of society collapsing to the extent you are suggesting.
pixelperfect··on Bitcoin is more like ham radio than the early internet
If you wallet is using the BIP39 standard you just memorize the 12-word phrase. The words come from the key, not vice versa.

Also, you can get by with just memorizing one phrase, because unlimited addresses are tied sequentially to a single phrase.

pixelperfect··on The FBI tracking your browsing history without a warrant might be the beginning
"freedom" and "democracy" are two of the twelve "core socialist values" that are plastered almost anywhere you look in China.
pixelperfect··on I learned 1500 Chinese Characters in a Month
I learned Chinese characters using this method and found it very helpful. It's not very popular among Chinese learners or teachers because it's unintuitive. In many cases the keywords of the characters you are learning are imprecise or goofy. But the point of the method is to rapidly form mental chunks at the character level so that later you can focus on a higher level of abstraction.
pixelperfect··on Age Reduction Breakthrough?
Yes, but this is considered by many to be scandalous and I doubt it will continue to be so high-priced long-term.
pixelperfect··on Ask HN: What website, from your early days on the net, do you miss?
I meant the GameFAQs message boards
pixelperfect··on Ask HN: What website, from your early days on the net, do you miss?
- old GameFAQs (before the GameSpot merger)

- Homestar Runner

- YTMND

- Newgrounds

- ieatcrayons.com (a webcomic that 11-year-old me found very amusing)

finally, not a website, but Ragnarok Online was the first MMO I played and the one I have the best memories from

pixelperfect··on A Little Clojure
He has a presentation from 6-7 years ago called "Clojure Is New C"

I never watched it because the title annoyed me too much

pixelperfect··on Why Adventure Games Suck (1989)
Sierra adventure games were my favorite single-player games from my childhood. I understand why a lot of people don't like them, e.g. many of the puzzles have nonsensical solutions, it's possible to get stuck because you didn't get an item in an area that you can't return to, etc. And the games haven't really aged well. But for the time they were my favorite.
pixelperfect··on REPL Debugging: No Stacktrace Required (2017)
That isn't a contradiction - the advantages of a REPL are greater for Clojure than for Lisp.
pixelperfect··on Interview with Scott Aaronson about philosophy and quantum computing [video]
They're both good. Sean Carroll is 'better' according to a few metrics I can think of, but for some reason I like Lex Fridman's podcast more.
pixelperfect··on 95th percentile isn't that hard to reach
It's not that difficult to get to the 95th percentile in Overwatch or Bridge because no one at the 95th percentile receives much compensation, monetary or otherwise.

When significant compensation is awarded to the 95th percentile of some field, attaining the 95th percentile is much more difficult.

pixelperfect··on Ask HN: What is the hardest part of self-learning?
It depends. Spaced repetition can be used to mindlessly memorize formulas, which I agree is not useful. Or it can be used in the way described in this article (http://cognitivemedium.com/srs-mathematics), which can lead to a deeper understanding.
pixelperfect··on Cryptocurrency in the 2020s
Do you think people should stop working on LN? I think it's a good way to scale right now, regardless of whether or not it can theoretically handle the transactions of hundreds of millions of people.

There are probably going to be some big entities in the Lightning Network ("lightning service providers") that average users use to open channels in exchange for a fee. These LSPs need to closely monitor for malicious transactions, but the average user doesn't have to. The average user would only get ripped off if their LSP broadcast an invalid transaction. In that case, they could prove it to the network and everyone would leave the LSP. Eventually there will be long-standing LSPs with good reputation. People can open long-running payment channels with them. If on-chain transaction fees get really high, they could be set to timeout after a year. That gives both parties plenty of time to notice an invalid transaction. If they're paranoid about DoS or timing attack, they can close the channel a few days before it times out.

That's my understanding only from reading a few articles about how Lightning Network works, so what I'm saying might be ridiculous and I could be completely wrong.

pixelperfect··on Cryptocurrency in the 2020s
Lightning Network is primarily off-chain transactions, but parties don't have to trust each other. If you open a payment channel with a malicious party, there's no way for them to benefit, and the worst they can do is make you wait a few days for a timelock to expire in order to withdraw your funds. Admittedly, that's a bit of a nuisance, which is why I'm surprised fees for Lightning Network transactions are so low currently (approximately $0.00). I've already used Lightning Network several times without ever doing KYC.
pixelperfect··on Cryptocurrency in the 2020s
Bitcoin is continuing to scale, but it's doing so with the Lightning Network instead of by increasing block size.

I'm not super familiar with Bitcoin's tech, but that seems sensible to me. The blockchain is already 250 GB at 7 transactions per second. If you multiplied that by 100, you still have orders of magnitude less transactions per second than credit card processors, but the hardware requirements are now high enough that few individuals could afford to run full nodes.

pixelperfect··on Americans are retiring to Vietnam
Is there a big disconnect between buy and rent prices? My brother was living in a nice area for a few hundred dollars per month just a few years ago.
pixelperfect··on Americans are retiring to Vietnam
I can tell you from experience that an average doctor in a backwater county of Arkansas is better than an average doctor in the capital city of Laos.
pixelperfect··on The Amazon Premium
Looks like you get charged if you go over the transfer allowance. Is there a way to automatically shut everything down to prevent that from happening? I like to go months without thinking about my server, knowing there's no way for a bot army to come around and ramp up my charges. I realize that's paranoid, but Amazon's competitors give me that option.
pixelperfect··on Ask HN: What Are You Reading?
The Demon in the Machine by Paul Davies (would recommend)
pixelperfect··on The American Dream Is Alive in China
The author of this article seems to anticipate that the growth China has experienced during the past few decades will continue for the foreseeable future. I am doubtful. International corporations continue moving manufacturing to other countries. China's total debt / GDP ratio keeps rising and will eventually be unsustainable. Population is aging. Automation will displace many manufacturing jobs. I don't think China's future is totally bleak, but it isn't rosy either.
pixelperfect··on Lambda School is SV big bet on reinventing education but students say is a cult
That said, .15 + (.85 * .15) = 0.2775, the proportion of the student body who either didn't graduate or didn't find a job within 180 days of graduating. So there is a significant fraction who might regret attending the program. But it still compares well with universities.
pixelperfect··on Lambda School is SV big bet on reinventing education but students say is a cult
Graduation rate would be a good figure to publish on their site. I searched for it out of curiosity, and according to the CEO they have ~85% graduation rate.

https://twitter.com/Austen/status/1140636581679624192

pixelperfect··on Lambda School is SV big bet on reinventing education but students say is a cult
> According to the Council on Integrity in Results Reporting, 60.9% of Lambda School students were employed 90 days after graduation, going up to 85.9% within 180 days. Graduates earn a median annual base salary of $60,000, according to that same study — although a Lambda School spokesperson puts that figure at $70,000, and notes that many graduates are in rural areas where average pay is lower.

This is one of the only paragraphs of the article with data rather than anecdotes. The article only focuses on students with negative experiences, but if this data is correct, it looks like Lambda School is objectively successful, and I bet only a small fraction of its students regret attending.

pixelperfect··on Elements of Clojure
https://twitter.com/porkostomus/status/1151595347157737472

I agree, if this person was acting entirely rationally they probably would have switched to learning JS and found a job by now. My only point is that there aren't many opportunities for junior-level Clojure developers who don't stand out as exceptional in some way.

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