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JackFr

14,997 karma · joined May 16, 2012

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JackFr··on See how a dollar would have grown over the past 94 years [pdf]
Very few entities have a 98 year horizon. People sure don't. Some insurance companies do I suppose.

A more interesting graph would be to show me the 30 year return at each point along the way. My gues is that stocks would still mostly come out on top, but not the runaway you see here.

JackFr··on Dystopian tales of that time when I sold out to Google
I believe what he likely meant (though not what he said), was that radical transparency shouldn’t be taken as a license to be an asshole.

I say that as a manager of narcissistic assholes who are always “brutally honest” and feel that their honesty excuses their brutality.

JackFr··on Dystopian tales of that time when I sold out to Google
Your authenticity is not everyone’s authenticity.
JackFr··on Dystopian tales of that time when I sold out to Google
Because someone has to put up the money. And the people who put up the money want a return on it, or they will put their money somewhere else.
JackFr··on Cord didn't win. What now?
One of the reservations the customer likely had is "will this company be around in X years?" The inferior home-grown product will continue to be supported.
JackFr··on Moody’s strips U.S. of triple-A credit rating
Back in the 90’s there was an explicit “sovereign ceiling” policy at the rating agencies.

I guess they’ve that rule.

JackFr··on Thoughts on thinking
Well I can extract a square root by hand. We all had to learn it and got tested on it.

No one to day learns that anymore. The vast, vast majority have no idea and I don’t think people are dumber because of it.

That is to say, I think it’s not cut-and-dried. I agree you need to learn something, but something’s it’s okay use a tool.

JackFr··on Burrito Now, Pay Later
In commodities and certain derivative markets, hedgers need to be matched with speculators. Hedgers are offsetting risk to speculators. Thus a farmer can insulate themselves against a drop in the price of corn and an airline can insulate themselves against a jet fuel hike. To do that someone has to take that risk. It might by to satisfy their risk appetite which will be tied to returns.
JackFr··on WeightWatchers files bankruptcy
An enterprise can be financed with debt or equity. Issuing debt to buy back shares is simply changing the capital structure of the firm.

It lacks a moral component.

JackFr··on What happens at the end of 'Trading Places'? (2013)
https://www.nytimes.com/2003/11/13/business/economist-pleads...

And disgorge your profits, pay a fine, go to jail and agree never to work in the securities industry ever again.

JackFr··on Ask HN: What are you working on? (April 2025)
Or perhaps follows the steps correctly.
JackFr··on Should We Respect LLMs? A Study on Influence of Prompt Politeness on Performance
I often find myself saying please and thank you, but the inability of the LLM to pick up tone can be amusing.

After one of the trashed my app in Cursor, and I pounded on my keyboard "WHY WOULD YOU DO THAT!!!" and the model, ignoring my rage and frustration, responded with a list of 4 bullet points explaining why in fact it did make those changes.

JackFr··on Should We Respect LLMs? A Study on Influence of Prompt Politeness on Performance
As language tools, the anthropomorphism is kind of the point.
JackFr··on Interview Coder is an invisible AI for technical interviews
It’s really simple. Don't lie or cheat and don’t abide those who do.

As a software development manager, I find the most important quality I need in my direct reports is honesty. If you are not honest with me it makes it very difficult to do my job.

That some developers have been conditioned to dishonesty is a shame on our industry.

JackFr··on Interview Coder is an invisible AI for technical interviews
People who lie and cheat often justify themselves by asserting that everyone does. It’s easier than admitting you’re a liar and a cheat and changing your ways.
JackFr··on How the 2025 US Financial Crisis is Different than 2008
The impotence of Congress is astonishing. Constitutionally the tariff power is exclusive to Congress, and Trump is exercising it only through emergency powers. Congress could end this easily had they a mind to. Presumably someone could make a challenge to the Supreme Court, but IANAL so it's not clear who has the standing to sue.

As a former Republican, and a Reagan conservative the utter cowardice and corruption of the Republican party nauseates me. No principles, no ethics.

JackFr··on All Estimations Are Wrong, but None Are Useful
It's a low effort way to make you consider all the necessary steps and possible contingencies for delivering the work. Creating the DB, onboarding to the API, etc., etc.
JackFr··on The average college student today
Questions are fine, unless they end up being a substitute for not preparing for class.

As a professor I had once put it, "This is difficult material. I don't expect you to understand it from just one lecture. You need to read the material before the lecture, but it will only be after you've struggled with the problem sets that I would expect you to understand it."

JackFr··on The surprisingly simple reason kids have imaginary friends
The authors cited a study saying just that:

https://pubmed.ncbi.nlm.nih.gov/38603042/

JackFr··on The average college student today
It is not interactive because the professor has demonstrated mastery of the subject matter and thoughts, ideas and suggestions of the students are an order of magnitude less of less value than that of the professors.

Some subjects are conducive to the Socratic method but hard sciences and mathematics for instance are not. Ultimately you are trying to speedrun 500 years or so of discovery and research and while motivating problems often help, sometimes you just need to read the book, listen to the lectures and put in some effort.

JackFr··on Evolving Scala
> I'd rather work with Scala devs on a Java codebase than Java devs on a Scala codebase.

And Java devs on a Scala codebase is effectively the norm once your project enters BAU/maintenance phase.

JackFr··on The Wright brothers invented the airplane, right? Not if you're in Brazil
People credit Dick Fosbury for inventing the modern high jump approach https://en.wikipedia.org/wiki/Fosbury_flop but it was the switch from jumping onto foam pads rather than into a pile of sawdust and sand that made it possible.
JackFr··on Wheel Reinventor’s Principles (2024)
> I/O of specialized formats comes to mind quickly

The classic "I'll write my own csv parser - how hard can it be?"

JackFr··on ChatGPT hit with privacy complaint over defamatory hallucinations
Presumably the corpus of news articles about "Local Dad is Unremarkable, Decent Fellow" is much, much smaller than the corpus of news articles about "Local Dad Sentenced in Shocking Child Murders".

Garbage in, as they say...

JackFr··on That Time I Recreated Photoshop in C++
Nailing the UI though is both very difficult and very important.

In 2006, GIMP had a ton of features, but compared to Photoshop’s UI it was positively awful.

JackFr··on The curious surge of productivity in U.S. restaurants
I'm not an academic economist, so what do I know, but I think the authors aare missing something else.

I think the productivity was in some part driven by minimum wage laws. At lower wages, developing, installing and maintaining ordering kiosks and smart phone ordering apps makes less sense, because fast food cashiers are so cheap. When fast food cashiers become more expensive (and the technology costs come down) kiosks and apps make more sense. The same amount of food sold without the cost of cashiers is the resultant increase in productivity.

So my theory in a nutshell was that cashiers added little value. Substituting capital for labor led to labor productivity gains.

JackFr··on The Lost Art of Logarithms
A 300 year old log table! What an opportunity to confirm Benford’s Law!

https://en.m.wikipedia.org/wiki/Benford's_law

“The discovery of Benford's law goes back to 1881, when the Canadian-American astronomer Simon Newcomb noticed that in logarithm tables the earlier pages (that started with 1) were much more worn than the other pages.”

JackFr··on The Lost Art of Logarithms
This is how I learned them in middle school — just common logs, as an aid to doing roots, powers and multiplications of big numbers.

We were told in an off-hand way that logs could be to any base, even ‘e’, but not to worry about that for a few years.

JackFr··on How far neuroscience is from understanding brains (2023)
Who knows? Maybe it’ll turn out like flying and birds.

Studying birds gave us some data, but mimicking them wasn’t what got us jumbo jets.

JackFr··on Ask HN: Should there be new RPN calculators to replace the TI-84?
You still see some HP12Cs on bank trading floors.
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