All the ways people encounter chaos when encountering unexpected NULL values.
621 karma · joined March 16, 2014
My go-to golf philosophy book is "Cheng Hsin: The Principles of Effortless Power":
> To relax, you must surrender your mind-even the notion that you have a mind. You will find that relaxing your mind is the same thing as relaxing your body. There should be no separation between your mind's activity and your feeling-awareness of bodily sensations and impulses. Feel yourself letting go so that your body isn't "held" so much--this requires doing the same thing with your mind. When you relax your tissues, nervous system, organs, the muscles around your organs, every-thing, then the energy will flow. It is this very relaxation that allows for the energy, or feeling-attention inherent in your body-being, to circulate, develop, and be utilized.
Don't know how this affects daily writing ;)
SELECT * FROM A, LATERAL (SELECT * FROM B ORDER BY a.embedding <-> b.embedding LIMIT 2) AS closest_in_b ORDER BY A.id;
It’s going to have so-so performance. So, don’t hose your production server. Create a vector index on b.embedding. HNSW will be nice for this use case.
Typically, the performance issues are at the ActiveRecord level, when it's initialization 100s of instances of an object to render a table. With Rails, the #1 optimization technique is to use `ActiveRecord::Base.connection.exec_query ` to return a hash instead of initialization objects.
Side note: I still love Rails.
You can't take a tether and redeem it for a dollar, so it doesn't really even have a price. Tether is just a placeholder for a dollar in the crypto-world.
Furthermore, Bitcoins aren't really priced in United States Dollars anymore, they are priced in Tether Dollars. The price reported on CNBC is tether dollars.
It's so synthetic, even that chart doesn't really matter. So, where can we find real dollars being exchanged for Bitcoin? We can find that in the GBTC trust. I would argue the actual price of a Tether is equal to the GBTC discount, which currently sits at 37%. So, a tether dollar is actually about 0.62 dollars.
The interesting bit from the source article is that changes to the mean do not always reflect the value of the nudge. So, when judging a nudge, data should be spun various ways to determine impact on different segments of the population.
I totally agree with you on developer productivity. Said another way, to connect technology & finance: early on, when developer cost is much more significant to the company than infrastructure costs, emphasizing developers building the right product is more important than optimizing the infrastructure costs.
Secondly, I am a fan of ORMs. I exclusively use ORMs on CRUD-based actions. The typical first-fix for ORMs I see is to move dashboards, reports, and aggregations to native SQL. Just doing that get you a lot of performance improvements. Recently, for a friend, not associated with Crunchy & not using Crunchy, I helped them lower their cost of database operations from $2500 / month to $500 / month. All I did was find the slowest queries, determine the ORM was running a slow query, and doing an N+1 query , then point them in a direction to fix it. Because their cost of operations were looking at increasing so quickly, they were looking at migrating to a different database, NoSQL, or something else.
Again, appreciate the feedback. Cheers.
At some point, total collapse of Tether’s pseudo-dollar will happen when the revenue generating exchanges feel they are support bad-money with good. All it takes is one player signaling a lack of support, and others stop supporting as well.
It’s a human psychological problem that’s a old as time. Think crypto can win over human rational to preserve self-interest? (side note: manipulation of self-interest is the goal of “weak hands” / “diamond hands”)
By moving to a pseudo-dollar like Tether, market makers can hang out while they wait for a suspect better buy-in price in the future. Should pseudo-dollars go way, they actual-Dollar transactions get a taxable haircut. Additionally, the friction of going from actual-Dollar to Bitcoin increases.
Tether is effectively behaving as a crypto-clearing house with their pseudo-dollar.
These events ultimately lead to the creation of the Federal Reserve for banks to participate in a semi-cooperative system that didn't devolve into save-yourself during times of crises.
The story here is that "unless there is a massive run" is actually a fairly common event.
If you truly need to shard, it's best to move deliberately and potentially roll your own at the application level. Your understanding of the infrastructure is far more important than sharding for the sake of sharding.
The browser natively handles internet connectivity, back / forward buttons, refresh buttons, URL management. Additionally, users have been trained to understand the responses, hit the refresh button, and use the back button. Browsers have gotten better at distinguishing between your internet being down and the website being down.
Good SPAs have to rebuild all of that functionality.
I use the things I learned for marketing, product, and engineering systems.
Want to improve a system? Before doing anything, collect data and measure. A system must be stable, else you cannot improve it. Marketing campaigns. Funnel optimizations. Performance improvement.
Most "stability" is achieved by simple things like squashing bugs (campaign bugs, performance bugs, or UX bugs).
Once you achieve stability of output (i.e. low standard deviation), then improve the system.
Simple, uh?
Take a goal oriented person with outstanding genomics for sport. Their binary decision tree of life is skewed in one direction by compliments and dopamine. They build up to the ultimate outcome to be an extrinsic release. The day comes for the ultimate test. The world watches for 30 seconds and moves on. Win or lose, the world doesn’t care the way they cared. The release never came — just silence (with no monetary reward).
If the Fed wanted to "invest" in Bitcoin, it would kill it by soaking up liquidity and creating a liquidity-squeeze. Because the amount in circulation is fixed, it wouldn't have to buy all of the Bitcoin -- just enough to kill any utility. This is a downside of an asset with a fixed quantity.
Once the community discovered the liquidity-squeeze spike, it would lead to a run-to-the-exit with a price crash. The short-squeeze spike and crash would spread across alt-coins as well due to rush-in-rush-out and leverage across alt-coins.
Once liquidity is killed, liquidity-squeezed, and a crash happens, the FED / SEC could make it illegal citing volatility and losses of citizens.
The Fed would need to do this discretely and never disclose their purchases. If it became public, the community would probably choose to fork.
curl https://api.cloverly.com/2019-03-beta/estimates/flight -X POST -d '{"airports": ["bhm", "atl", "sfo"]}' -H "Content-type: application/json" -H "Authorization: Bearer public_key:47800ea0ee541b4c"
Disclaimer: I work there.
With these tools, "growth" learned they could inject messaging using javascript to nudge users along instead of working to improve the underlying product. Other teams had NPS scores asking for ratings before the product was even used. Marketing put messaging on their pages to high-jack conversations and push lead-gen for sales. The customer experience and the budget was being pulled in 10 directions.
Unlike the article's issue being a product issue, this issue was an organizational issue. The messaging and tools meant that teams could actively pursue their own goals without working together.
> Ipsos, which conducts the quarterly poll for MNP, surveyed 2,070 Canadians online from March 13-24.
I don’t trust this data as far as I can throw it.
Corrected headline “48% of 2,070 responses to online surveys stated that the respondee does not have $200.”
The outcome of any one event is Boolean: you hit the target or you miss. Feedback is instant.
You have to learn to put your mind into the zone. You do that through repetition. While competing, if you worry about your competitor, or the next shot, or how you look, you will miss. Coincidentally, you learn to turn off your brain from trying too hard. A relaxed brain and body are quicker to react, and more powerful.
I leaned mental toughness through a game with small Boolean feedback, which rewards focus and rejects excessive effort. It is like instant feedback on meditation.