HNHacker News
TopNewBestAskShowJobs

sema4hacker

798 karma · joined April 28, 2020

submissionscomments
sema4hacker··on This may be the most bonkers tech job listing I've ever seen
Just quoted fragments from https://icon.com/careers, not a complete reproduced listing. Odd that you can apply to be a "founding" engineer, "founding" creative, etc.
sema4hacker··on Power over Ethernet (PoE) basics and beyond
POE switches can have more jacks than they can provide power for. I have five pan-tilt-zoom (PTZ) cameras but learned they can need up to 40 watts each, preventing plugging them all into a particular POE switch I had. Chaining a couple of switches solved the problem, be beware how much power your devices need to consume.
sema4hacker··on Google Has a Bedbug Infestation in Its New York Offices
If the original bedbugs migrated from the office to employee homes, or vice versa, they'll probably find that after treating the office the bugs will just get reintroduced.
sema4hacker··on Brains Remember Stories Differently Based on How They Were Told
I have yet to re-watch a TV show or movie I saw long ago and not discover that some scene or dialog I thought I could recall exactly was in fact different from what I remembered. The older a given memory, the more inexact it is.
sema4hacker··on Goldman Sachs says fears about AI bubble are overwrought
Of course an investment bank will want you to continue to invest.
sema4hacker··on US NSA alleged to have launched a cyber attack on Chinese timekeeping agency
If a physical weapon is sent across a border to attack and disrupt something in another country, is that an act of war? Is a cyber attack by one country on the assets of another essentially the same thing? If so, what retaliation is justified? If not, what's the limit on how far and wide cyber attacks can be attempted? Seems like cyber attacks might easily be escalated to the point of causing actual warfare.
sema4hacker··on My Last Day as an Accomplice of the Republican Party
...and I believe farther that this is likely to be well administered for a Course of Years, and can only end in Despotism as other Forms have done before it, when the People shall become so corrupted as to need Despotic Government, being incapable of any other.

~ Benjamin Franklin, Closing Speech at the Constitutional Convention (1787)

sema4hacker··on My Last Day as an Accomplice of the Republican Party
I think the likes of Stalin and Hitler had the intelligence, cunning, and control to actually lead their misguided followers. What worries me about someone like Trump is how an immoral and unethical grifter can keep fooling roughly half the population, while the puppet masters behind him push their agenda. I'm worried we're moving into an era where presidential candidates will merely be a personality, incapable of any significant train of thought, and unseen controllers will actually be calling all the shots. At least Mile Bruner came to his senses and has decided to do the right thing.
sema4hacker··on Americans Need to Be Richer Than Ever to Buy Their First Home (2023)
Interesting that you assume I'm not a minority. Black home ownership was 38% in 1960, and maybe even higher in Seaside, because a lot of Black GI's were based in adjacent Fort Ord.
sema4hacker··on Thieves steal crown jewels in 4 minutes from Louvre Museum
I work part-time at an art gallery (not a museum) with 300 pieces from 300 artists, on two floors. The typical visitor walks through, looking but not stopping, often not bothering with upstairs. It's rare for anyone to take more than 20 minutes.
sema4hacker··on A Tower on Billionaires' Row Is Full of Cracks. Who's to Blame?
San Francisco also has a well-known hi-rise disaster. You would think that after decades of the USA building skyscrapers that new construction would be a slam dunk.
sema4hacker··on Am I missing out in my 20s living in South Bay instead of SF?
AI is a bubble. Don't count on it for anything.

Let's assume you work 8 hrs/day, sleep 8 hrs/day, and do everything else in the remaining 8 hrs/day. So work is half your waking hours. Decide which is more important to you: the 8 hrs of work or the 8 hrs of everything else, and choose your location accordingly.

You're never going to be with fewer obligations and responsibilities than in your 20's, so now is the best time to experiment. When I was in my 20's, my job and location changed every 2 to 3 years, so anything I decided didn't turn out to be permanent anyway.

Don't overthink it, and do what makes you happy.

sema4hacker··on RTFM: A Real-Time Frame Model
It's a mistake to use an acronym widely known for another saying.
sema4hacker··on Why C variable argument functions are an abomination (and what to do about it)
On my monitor, the text font and color you've chosen bleeds badly and contrasts imperfectly against your black background. It was irritating enough I had to give up reading.
sema4hacker··on Pop star laments missed SF tech investment that would've made him $5B
Probably every hugely successful company has a story about an investor that passed up a ground floor opportunity then later regretted it. However, the number of those investors is probably far outnumbered by the number of investors who took a chance on a company that went nowhere.
sema4hacker··on Unpacking Cloudflare Workers CPU Performance Benchmarks
Yes, competition is good and mergers and acquisitions are bad. It also shows why you always have to internally be comparing yourself to the competition and not be complacent, before someone independently does the comparison for you and you're embarrassingly caught with your pants down.
sema4hacker··on The people rescuing forgotten knowledge trapped on old floppy disks
A few years ago I had a Mac floppy from the 90's I could no longer read but wanted to retrieve a file from. I sent it to a data recovery service that had high expectations of success, but they failed too. It was so disappointing.
sema4hacker··on China Has Overtaken America
Decades ago I had Chinese coworkers and decided to ask them to teach me a word or two a day. I immediately discovered I could not tell the difference between the five tonal sounds of "ma" and so never got very far at all.
sema4hacker··on Americans Need to Be Richer Than Ever to Buy Their First Home (2023)
In 1960 my parents bought a brand-new 3 bedroom 1.5 bath in Seaside California for just under $16,000, with no significant savings. He was an Army sergeant and she was a housewife and I had one sister. I doubt anyone in their situation could find a similar deal and location and pull that off today.
sema4hacker··on I Learned to Spot Inflated Bids (and What You Can Do Too)
I spent many months renovating a commercial building. The highest estimate received for painting was almost 10x the lowest! The range of estimates for flooring, electrical, roofing, and other big jobs was also laughably wide. Surprisingly, the low or near-lowest bidder was often a very acceptable and competent choice.
sema4hacker··on Mozilla is recruiting beta testers for a free, baked-in Firefox VPN
I've always wondered why Google offers free email, free document space, a free browser, etc., but no free VPN. Perhaps Mozilla will finally make them come around.
sema4hacker··on Ireland is making basic income for artists program permanent
99.99% of artists definitely CAN'T make a living off only their art, but most can survive anyway by some form of other employment. Even though some small degree of government subsidies will always be around to help artists, and perhaps that's a noble principle, I'd just rather see my tax dollars go to health care or trade schools or food banks or child care or disaster relief or Meals On Wheels or medical research or similar efforts to help those in desperate need, instead of to artists choosing to be artists. There's always someone worse off than an artist, through no fault of their own.
sema4hacker··on Ireland is making basic income for artists program permanent
I manage a large art gallery that exhibits a large number of artists, selected from our database of over 4,000 artists, most of which are in the local area.

NONE of them can make a living solely off their art.

Personally, if I wanted to subsidize someone who could bootstrap their talent and efforts into self-sufficiency, I'd never pick an artist.

sema4hacker··on Ask HN: Why do engineers hate salespeople?
At that same company, I remember the VP of Marketing having zero ethics. He had an ad agency think up and develop an ad campaign, then told them no, and took all their ideas and examples to a different agency to avoid being charged for the concept.
sema4hacker··on Why Is SQLite Coded In C
"Why SQLite is coded in C..." is an explanation, as documented at sqlite.org.

"Why is SQLite coded in C and not Rust?" is a question, which immediately makes me want to ask "Why do you need SQLite coded in Rust?".

sema4hacker··on Ask HN: Why do engineers hate salespeople?
Years ago, as a programmer, I would say I didn't HATE our salesmen (we had no saleswomen), but I was definitely not IMPRESSED with them, because they would say anything, even lie. I remember our company had an open house for employee families, during which our lone minicomputer was programmed to make the reel-to-reel backup tape move back and forth just to have it doing something. When our top salesman brought his family around to show off our computer room, he just made up and announced some BS story about that moving tape, and his story had no relation to any past, present, or future truth. I immediately thought "God knows what he claims when talking to our customers".
sema4hacker··on University of California sets world record with five Nobel Prizes in one week
And the California climate attracts people to California schools.
sema4hacker··on IKEA's Pencil Is the World's Most Stolen Object
If they just put a big bucket labeled USED PENCILS at their exit, they won't have to buy so many millions of pencils all the time.
sema4hacker··on Ask HN: What are you working on? (October 2025)
I do not find this giant block of text helpful at all.
sema4hacker··on Ask HN: What are you working on? (October 2025)
It would be helpful for the box for each test to include some explanation, eg:

25-Hydroxyvitamin D, also known as calcidiol, regulates calcium absorption in the intestines, promotes bone formation and mineralization, and supports immune function.

Apolipoprotein B (ApoB) is a protein that binds to LDL receptors on cells, allowing lipoproteins to deliver cholesterol and triglycerides to tissues for energy or storage.

Lipoprotein(a) is a low-density lipoprotein variant identified as a risk factor for atherosclerosis and related diseases, such as coronary heart disease and stroke.

etc.

← PreviousPage 5 of 15Next →