Hacker Newsnew | past | comments | ask | show | jobs | submit | mrlase's commentslogin

Would love to read more about how you have mobx structured here. I have a similar graph of mobx objects for something I’m building but haven’t come up with an ergonomic sync story yet.


Mine is simple but relies on a few cheap tricks (like generating uuids in the frontend and manually linking relationships in an order where replaying on the db is going to work). Happy to walk you through it if you want to message me.


I'd highly encourage anyone interested in the contents of this article/learning about learning to read through the submitter's blog: https://www.justinmath.com/blog/


I also recommend https://www.learningscientists.org/posters from scientists in the field, which covers additional scientifically-effective approaches that a course designer or more long term approach might take. For example, not only applying Spaced Repetition, Interleaving and Active Recall (all possible through automated spaced repetition apps based on simply input), but elements like Dual coding (related to "Varied practise") - mixing visual and other elements when learning (which requires effort to create them), and elaboration practise (like free recall). To the end of applying these - and other critical elements like focusing on the motivation of the learner and enabling them to understand what they are missing with progress & identified "blindspot" misconceptions (on their own incredibly powerful), I've been developing Revision.ai since before GPT-3, through a Psychology MSc.


See also the wonderful https://betterexplained.com


Content is good but he is part of a paid math program and some articles and submissions appear to be indirect advertising/marketing if you think about it. (but it's effective and less forceful) https://www.justinmath.com/why-is-the-edtech-industry-so-dam...


Yes. The submitter uses spaced repetition techniques to build persistent memory of his spaces reposition math education business.


I don't even think it makes them look ancient, it makes them look odd for claiming that when they clearly are not the first open source IAC framework...

OP, why exactly are you describing yourself as the first one?


The pricing here seems asinine. $0.10/successful API call?


This data is worth far more than 10 cents.


PA, for example where I went to school, was still nearly $20k/year for tuition at the flagship state schools. I know a lot of people in-state that ended up with over $100k debt.


$100k in student loans @ 4% and a 10 year pay off period. That's over $70k net pay in Philadelphia. I'd imagine you could certainly afford to buy a home after a short period of time saving for a down payment. If the dual income household is over $200k gross then it's just poor financial decision making.


Citibike in NYC is wildly successful.


I've had the same experience. I'd select the cheapest possible chicken breast from Whole Foods and they replace it with air chilled, free range chicken breast. The difference in cost was quite significant per pound.


Please contact our support team in these cases, we absolutely aren't deliberately choosing more expensive items in order to profit -- see my comment elsewhere on this article, but we primarily look at your previous preferences and the preferences of other customers.

If you chose the cheapest possible option, it does seem inevitable that any replacement would be more expensive :-)

And, sorry that we were frustrating to you.

(engineer @ Instacart)


If this is really happening frequently, could it the pickers going for items they already know where to find?


Yeah as somebody who was a personal shopper before the internet getting requested items can be really tricky there is no guarantee they won't run out of something there is no Ralfs API to plug into to give real-time inventory information.


> there is no Ralfs API to plug into to give real-time inventory information

Which is why "send people to grocery stores" is going to lose out to more vertically integrated models.


  there is no Ralfs [sic] API to plug into to give real-time inventory information
[citation needed] :) there are many ways to "vertically integrate" with retailers (and yes, some do in fact offer a real-time API of what is in store, and our availability information for those is fantastic)


I don’t think so because every time they do this, (often), I let them know and they refund that more expensive price, so I’m not sure it would be economical


It's classic corporate bully tactics. Most people will let themselves be steamrolled and the corporation knows it. If one person (you) complains they will gladly refund because they know twenty others will not be able, know how, or care enough to pick the fight.

It's the same strategy as "unexplained" charges appearing at random on people's phone and cable bills. Concede one battle, win twenty others. Massive fraud being perpetrated every day gets a pass because:

1) each individual fraudulent act is so small the cost of fighting it is greater than the insult perceived by most victims

2) arbitration clauses

3) monopoly

4) corruption (kickbacks &c)

5) delegation of customer service to automated answering systems; it's easier to bilk your fellow man when he's invisible to you

Don't ever kid yourself, these policies are intentional and calculated, with malice aforethought. You can be certain spreadsheets and charts were created, examined and became the basis of an affirmative executive decision.


The fare for NYC is incorrect -- $2.50 is the base price and $0.505/mile and $0.50/minute the car is stopped (i.e. in traffic if they're waiting). There's also a $1 surchage between 4-8pm on the weekdays.

http://www.nyc.gov/html/tlc/html/passenger/taxicab_rate.shtm...


>$2.50 is the base price and $0.505/mile and $0.50/minute the car is stopped

Sorry, I was going off "Plus 50 cents per 1/5 mile" to mean $2.50 per mile. Where are you getting $0.505/mile from your link?


Lol I read that completely wrong. Time for more coffee, I suppose -- that definitely means $2.50/mile.


While that link is part of WCAG 2.0, there are other items within the standard to follow such as: https://www.w3.org/TR/WCAG20-TECHS/H67.html. Decorative images are not supposed to be read by the screen reader.

https://www.w3.org/WAI/tutorials/images/decorative/


It is the opposite. False positive in this context would be thinking someone is good when they're actually bad and vice versa for false negative...


Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: