neilparikh

I built a similar system for my school’s CS club. I considered using a door sensor, but the eventual solution I settled on was a light sensor, because it’s almost always true for us that the lights are on iff the door is open.

This way, we don’t need to mount anything on the door, we just have a microcontroller plugged into one of the machines.

Our previous solution was a webcam that pointed to the lights that did a similar thing (implemented by someone before my time) but then it stopped working due to some driver issues, and I didn’t want to spend time investigating them.

> my wife with iphone pops up browser, I pop up mine with firefox and ublock origin. Internet is utterly useless and horrible place on her phone, while completely fine on mine (plus I get youtube ads blocking as a bonus)

I recently set up NextDNS on my iPhone and browsing the web has become much more usable (previously, I would get webpage crashes!). Something to look into in addition to or instead of Wipr.

When I was traveling abroad, I placed an order on Walmart, shipping to my home address, so that it would be there for me when I got back home. Walmart cancelled the order, "due to location restrictions on placing and shipping orders", even though the delivery address was in the US! I have no idea why the physical location of the computer placing the order should matter to Walmart. Eventually I just had to get my friend order for me.

Many streets in parts of Asia (Korea and Taiwan for example) are similar. A majority of the "side" roads just don't have sidewalks, and people walk on the road. I was a little nervous the first few times I encountered it (having grown up in very car oriented suburbs and then lived in Canadian downtowns after that), but it definitely grew on me.

The point is that this is a societal issue. One person paying doing some charity on their own doesn't solve the societal issue.

As analogy: "It sucks that my peers earn less than me because they are part of <X disenfranchised group>"; You: "Why don't you just take your extra income and give it to them?"

This is a classic coordination problem: you need all the sellers to leave together so that individual merchants don't take a loss. And coordination problems like this are one of the main areas government action can help!

For Uber and UberEats, turns out you actually can disable marketing notifications, under the communication settings, it's just hidden away.

I watched the movie first, but enjoyed the written story more (though I still thought the movie was great!). The big difference for me was the inclusion of the physics in the written story, and how it was connected to the linguistics.

Capital One credit cards have this feature.

I don't think it's clear that PFOF is bad for retail investors. Many people argue (see Analysis section of the article you posted, and also Matt Levine's writing about it on Money Stuff) that PFOF is actually a net good for retail investors, getting them both price improvement and lower commissions.

Also:

> In the United States, accepting PFOF is allowed only if no other exchange is quoting a better price on the National Market System. ... Transactions must be executed at the best execution, which could mean the best price available or the speediest execution available.

Many of my professors would mention the problem numbers for both the current version, and the previous version, to deal with that specifically.