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Open-source Zig book

https://www.zigbook.net
345•rudedogg•6h ago•117 comments

Britney Spears' Guide to Semiconductor Physics

https://britneyspears.ac/lasers.htm
97•lachlan_gray•2h ago•35 comments

Browser fingerprinting via favicon

https://github.com/jonasstrehle/supercookie
202•vxvrs•6h ago•47 comments

Heretic: Automatic censorship removal for language models

https://github.com/p-e-w/heretic
398•melded•10h ago•157 comments

PicoIDE – An open IDE/ATAPI drive emulator

https://picoide.com/
23•st_goliath•2h ago•1 comments

How Your Brain Creates 'Aha' Moments and Why They Stick

https://www.quantamagazine.org/how-your-brain-creates-aha-moments-and-why-they-stick-20251105/
36•wjb3•3h ago•3 comments

What if you don't need MCP at all?

https://mariozechner.at/posts/2025-11-02-what-if-you-dont-need-mcp/
130•jdkee•6h ago•74 comments

Dark Pattern Games

https://www.darkpattern.games
107•robotnikman•6h ago•53 comments

The Pragmatic Programmer: 20th Anniversary Edition (2023)

https://www.ahalbert.com/technology/2023/12/19/the_pragmatic_programmer.html
71•ahalbert2•4h ago•10 comments

A File Format Uncracked for 20 Years

https://landaire.net/a-file-format-uncracked-for-20-years/
30•todsacerdoti•1w ago•2 comments

A new chapter begins for EV batteries with the expiry of key LFP patents

https://www.shoosmiths.com/insights/articles/a-new-chapter-begins-for-ev-batteries-with-the-expir...
10•toomuchtodo•1h ago•1 comments

Z3 API in Python: From Sudoku to N-Queens in Under 20 Lines

https://ericpony.github.io/z3py-tutorial/guide-examples.htm
81•amit-bansil•7h ago•3 comments

I finally understand Cloudflare Zero Trust tunnels

https://david.coffee/cloudflare-zero-trust-tunnels
115•eustoria•8h ago•39 comments

Goldman Sachs asks in biotech Report: Is curing patients a sustainable business?

https://www.cnbc.com/2018/04/11/goldman-asks-is-curing-patients-a-sustainable-business-model.html
120•randycupertino•2h ago•62 comments

FPGA Based IBM-PC-XT

https://bit-hack.net/2025/11/10/fpga-based-ibm-pc-xt/
137•andsoitis•10h ago•27 comments

I have recordings proving Coinbase knew about breach months before disclosure

https://jonathanclark.com/posts/coinbase-breach-timeline.html
323•jclarkcom•5h ago•110 comments

The fate of "small" open source

https://nolanlawson.com/2025/11/16/the-fate-of-small-open-source/
137•todsacerdoti•6h ago•96 comments

Why your mock breaks later

https://nedbatchelder.com/blog/202511/why_your_mock_breaks_later.html
17•ingve•3h ago•8 comments

Fourier Transforms

https://www.continuummechanics.org/fourierxforms.html
99•o4c•1w ago•14 comments

Brimstone: ES2025 JavaScript engine written in Rust

https://github.com/Hans-Halverson/brimstone
191•ivankra•14h ago•94 comments

Linux mode setting, from the comfort of OCaml

https://roscidus.com/blog/blog/2025/11/16/libdrm-ocaml/
41•ibobev•6h ago•4 comments

Decoding Leibniz Notation (2024)

https://www.spakhm.com/leibniz
32•coffeemug•6h ago•5 comments

Open Catalyst Project

https://opencatalystproject.org/
3•mfiguiere•2w ago•0 comments

Lithium vs. Lettuce

https://ambrook.com/offrange/photo-essay/lithium-v-lettuce
28•mfburnett•1d ago•4 comments

Show HN: Spam classifier in Go using Naive Bayes

https://github.com/igomez10/nspammer
15•igomeza•1w ago•3 comments

Shell Grotto, Margate

https://en.wikipedia.org/wiki/Shell_Grotto,_Margate
35•Michelangelo11•1w ago•4 comments

Anthropic’s paper smells like bullshit

https://djnn.sh/posts/anthropic-s-paper-smells-like-bullshit/
847•vxvxvx•14h ago•262 comments

Garbage collection is useful

https://dubroy.com/blog/garbage-collection-is-useful/
116•surprisetalk•12h ago•38 comments

De Bruijn Numerals

https://text.marvinborner.de/2023-08-22-22.html
65•marvinborner•10h ago•7 comments

Waiting for SQL:202y: Group by All

http://peter.eisentraut.org/blog/2025/11/11/waiting-for-sql-202y-group-by-all
42•ingve•5d ago•19 comments
Open in hackernews

Pennies Are Trash Now

https://www.theatlantic.com/ideas/2025/11/pennies-circulation-mint/684935/
30•JumpCrisscross•6h ago

Comments

internet2000•5h ago
> Many Americans—and many people who, though not American, enjoy watching from a safe distance as predictable fiascoes unfold in this theoretical superpower from week to week—find themselves now pondering one question.

This is way too much spite for an article about coins. Lord.

HPMOR•4h ago
https://archive.is/uel4S
akeck•4h ago
According to Marketplace.org, pennies are treasure for some businesses now because the regional Feds aren't distributing them.

https://www.marketplace.org/story/2025/11/13/businesses-face...

dehrmann•2h ago
I've been listening to Marketplace less because of stories like this. The half cent went away, the penny went away, other countries have discontinued currencies. You keep accepting pennies and you round when people pay in cash. At some point, your register will do the rounding for you. There isn't really a story here.
sdenton4•2h ago
The register might already do the rounding if it was designed to work in Canada, which got rid of the penny over a decade ago.
zdragnar•1h ago
There's a bunch of regulations that need tweaking. AIUI, it's illegal to charge SNAP more than other customers. someone who paid cash and gets rounded down technically pays less than what the government got charged. It's only on the order of pennies, I don't think the law cares about that at all.
dehrmann•1h ago
I don't buy the SNAP argument because there's already rounding when taxes are applied, and half cents are still legal tender, so you could go into a store, tell them they should have charged half a cent less, and then they'd be in a similar trivial violation of SNAP.
FrankWilhoit•4h ago
Ask {some number of} engineers: You have just been made a free gift of six thousand metric tons of zinc. What do you do with it?
joering2•4h ago
Supposedly it cost gov 4 cents to mint 1. Does it have to be done with zinc tho? Why not plastic or some cheap material? Although you may be able to 3D print a penny at home (just like it being made from zinc can actually stop someone), but just like with a real one, its not like you will show up at your local bank with $1 million dollar worth to deposit.
phainopepla2•3h ago
Even if they were free to mint they're still effectively worthless trash to most of us. I've been waiting for the penny to die for decades, and it would be nice if we had a functioning government that could handle these nonpartisan issues smoothly, but we haven't had anything like that in a long time, so the rip the bandaid off I say
toast0•3h ago
Zinc is the cheap material though. It replaced copper (except for the foil outer), when copper was too expensive.

If there was a suitable and even less expensive metal, I think it might be reasonable to switch again. But if we have to rebuild coin handling to use a plastic penny, I think it's necessary to consider the costs and benefits of a vastly different material versus the costs and benefits of abandoning pennies.

dimensional_dan•2h ago
The other option would be to rebase the currency such that a single penny was a meaningful unit of money again. One potential such way would be to issue new paper notes which represent the old note with a decimal place move such that $10 becomes $100. This has been done before but might not be a great idea for the USA.
nocoiner•1h ago
Wouldn’t the decimal place have to move in the other direction for the penny to become useful again?
DoctorOW•3h ago
The reason the government isn't warning people or slowing the withdrawal is because nobody cares. Any amount of money they can get for recycling is better than the loss now. (though the current admin is known to "chicken out" which probably explains them preparing to spin production back up if they need to)
dehrmann•2h ago
Do you not just shred them and send them to a scrap metal processor?
puppycodes•2h ago
Only pennies before 1982 are worth scrapping as they are made of copper.

The newer pennies are not really worth the effort as they are mostly zinc.

Ironically if they are no longer illegal to melt down (IANAL but I would think this is true?) they actually would be more worth it to scrap because of the negated risk.

sdenton4•2h ago
We can turn them into suntan lotion!
puppycodes•2h ago
hahah ok actually I love that.

I think however the problem would be the trouble in seperating the zinc from the copper, I think you would likely operate at a loss still but this is just a guess.

GrifMD•1h ago
It's called Coppertone for a reason
dehrmann•2h ago
> The newer pennies are not really worth the effort as they are mostly zinc.

They're still worth $1 per lb., and you have to destroy them, anyway.

puppycodes•2h ago
It's their mix with copper I beleive that makes them less valuable than their raw value in zinc if thats what your number is based on...

because the cost of seperation from the copper is greater than simply sourcing other materials.

lukevp•1h ago
I read this as a joke ($1/lb because 100 pennies weighs about a pound - although online sources make it sound like it's closer to 200 pennies for a pound)
Laremere•1h ago
No law in relation to pennies has changed. The executive branch has simply took the law stating the mint should create as many pennies as necessary, and decided that the necessary amount is 0.

The practicalities of their illegality then comes down to enforcement. Given the current executive branch's behavior related to enforcement of laws, that can mean anything from "melt them all down", to "don't do it", to "if our friends start doing it, it'll be legal, if our enemies start doing it, we'll enforce".

frou_dh•2h ago
You can make really cool flooring with lots of pennies in grids.
JCM9•2h ago
This is all a bit hyperbolic. Stopping minting pennies made sense and has precedent. There used to be half penny coins.

Also, pennies are still legal tender. Folks can take them to a bank or other venue and cash them in. They’re not “trash.”

DerekL•2h ago
*precedent
JCM9•2h ago
Thanks and fixed. Darn autocorrect.
jldugger•2h ago
> Folks can take them to a bank

FWIW my bank refuses to accept unrolled coins, long before this month's retirement of the penny.

leoh•1h ago
Is that legal?
CGamesPlay•1h ago
It seems more reasonable than the outright refusal of many businesses to accept cash at all, and plus this transaction isn't even a "debt" to which the penny would be legal tender.
analog31•1h ago
As I understand it, more than X dollars worth of coins is not legal tender. I learned this due to an absurd case in Detroit, where someone stole bags of coins from an armored car, got caught, and claimed their crime was not a felony because it was below the dollar limit for a felony. Of course the judge treated their request with the disdain that it deserved.
bigfishrunning•1h ago
So roll them?
analog31•1h ago
One of the reasons why I changed banks. My new bank has a coin counting machine in the lobby, you throw your coins in, it consumes them, and gives you a slip that you take to the teller.

As I understand it, coins are considered a government service. Banks and retailers pay to deal with them. Buying them from the public for face value actually saves them money.

ghssds•50m ago
It's so easy to use coins, pennies included, in day-to-day transactions I never accumulate any. Accumulating pennies or other coins is a concept I don't understand. You can spend up to 4 pennies in any purchase you do, and if you don't can't never receive more than 4. For nickels, dimes, and quarters, the maximum is smaller.
JCM9•1h ago
A lot of banks just have one of those coin counting machine things (like Coinstar but not Coinstar).

Coinstar also often has zero commission options like gift cards that are an easy way to cash in extra change without paying fees.

pengaru•1h ago
It's odd how banks have largely stopped operating change counting machines.

In my childhood we'd hoard loose change then make a trip to the local po-dunk bank serving my neighborhood surrounded by corn fields, and even there they'd take our bucket of loose change and dump it into a counting machine for free.

It was a game to try guess the amount we'd get in paper cash...

Now you have to pay for this service at a grocery store using a cumbersome machine operated by Coinstar.

zdragnar•1h ago
COVID happened. However, all three of the banks I visit regularly (over branch of a national bank, two branches of a local credit union) all have coin counting machines in the lobby, though it took awhile for them to be added back to the branches that took theirs out.
spott•1h ago
I think when the half penny was discontinued it had the same buying power as the dime does now or something like that.

So this is long overdue.

xgkickt•2h ago
100 fuses for $1, awesome! ;-)
FridayoLeary•2h ago
Several points: firstly i would assume every country has a process for disposing of bad and worn out notes and coins. If not i'm sure someone could work out how to profit from recycling dead pennies in true capitalist fashion. This leads on to my second point which is when the government has time they should get around to issuing a bill removing pennies (and maybe other smaller denominations) from legal tender.

But there is a wider point which i want to discuss. How long will physical cash last? I'm very fuzzy on this but i think in some of the Asian countries it is practically an endangered species. Tax people don't like large denomination notes. And virtually no legal big transactions take place in cash. America must profit massively from the fact that in many other countries dollars are the go to black market currency but that is a very singular advantage.

5555624•1h ago
Per the U.S. Mint, the life span of a coin is 30 years:

     "A coin’s typical lifespan is 30 years. See https://www.gao.gov/assets/gao-19-300.pdf, page 6." 
For paper money, depending on denomination, 5.7 to 24 years. (https://www.federalreserve.gov/faqs/how-long-is-the-life-spa...)
mmooss•1h ago
This rounds physical currency to the nearest $0.05, effectively. Why not round everything to the nearest $0.1? The math and adjustments (changes to every printed price, etc.) would be simpler. How much for the wine? "$19.9". It seems much simpler to me, though I'm sure it's been discussed ...

Is there some item that would be problematic to round to $0.1? I suppose anything that is fractionally priced at ≤$0.05 is now would have a minimum purchase of 2. Items bought in bulk could be priced fractionally.

We already round off fractional pennies all the time, e.g. in securities market prices, tax calculations, gasoline prices, etc. That's not a problem. And any electronic purchase could be for fractional amounts - but why?

(Once upon a time, you probably could sell the idea to IT people by pointing out how much memory and bandwidth it would save.)

evanelias•1h ago
At minimum they're useful as makeshift pie weights when blind-baking a pie crust. After shaping the dough in the baking dish, cover it in aluminum foil and then fill it with pennies. They conduct heat well, and prevent the dough from bubbling or shrinking.
greekrich92•51m ago
The value of my wheat pennies and war pennies just went up