HNHacker News
TopNewBestAskShowJobs

hcrisp

1,490 karma · joined March 22, 2012

submissionscomments
hcrisp··on Free IRS-run tax filing pilot to be available in 13 states
I've used it for many years and never had a problem. It is like filling in a PDF form but has a "Calculate" button which runs all the math for you (apart from some tables, etc. which you need to look up yourself). So I'm not sure how you would get off by a cent.

Federal taxes only. Except for entering in your W-2s by hand, it's pretty straightforward. You can save a PDF copy to your local drive. The nice thing is you save postage and do not have to pay someone to prepare / file it for you.

hcrisp··on Why are there so many colourful houses in Bristol?
The island town of Burano, Italy, is another place known for colorful houses. They were originally said to help sailors at sea, but they are now protected by law and to change the color you must apply to the government for approval.

https://www.untoldmorsels.com/burano-venice-colorful-houses-...

hcrisp··on Continue with LocalAI: An alternative to GitHub's Copilot that runs locally
Ollama only works on Mac. Here is a portable option:

https://github.com/xnul/code-llama-for-vscode

hcrisp··on Scientists Question Superconductivity Claim from Physicist Accused of Plagiarism
They buried the lede in the bottom third of the story via this tangential comment:

> Last week, a different group of scientists at institutes in South Korea and at William & Mary in Virginia claimed they saw superconductivity without extreme conditions in a lead compound in the presence of copper, but scientists have said they are skeptical about the findings, posted ahead of peer review to arXiv.

hcrisp··on The Unreasonable Effectiveness of Sequence Diagrams in MermaidJS
An alternative to using Marky to render the Mermaid diagram which I did not see anyone mention is this VS Code plug-in. I use it and it is quite nice:

https://marketplace.visualstudio.com/items?itemName=bierner....

hcrisp··on Voice search gets better results than text
Mentioned in this WSJ article: https://www.wsj.com/articles/search-engines-results-dictate-...
hcrisp··on Can alligators climb trees? (2021)
Brings to mind the children's book "Flap Your Wings" by P. D. Eastman. Didn't climb a tree, but was raised by birds in a tree!

[0] https://seuss.fandom.com/wiki/Flap_Your_Wings

[1] https://www.parentsoffostercare.com/pd-eastman-how-to-explai...

hcrisp··on Mojo might be the biggest thing to happen in programming for decades
Thanks, Jeremy. It does sound exciting. It reminds me a bit of what Blaze hoped to offer (a unified interface but to diverse data storage instead of processing systems) but never came to fruition. And folks have been talking about needing an ML/AI-centric language that could feel more natural and expressive than the abstractions that Tensorflow, PyTorch, and Jax provide. Maybe Mojo is it.

To get full performance though, you can't write just Python. As you show in your demo, you have to add verbose typedefs, structs, additional fn/defs, SIMD calls, vectorization hooks, loop-unrolling, autotune insertions, etc.

While great, this adds mental overhead and clutters an otherwise concise and elegant syntax. Do you think this syntactic molasses will become second nature to developers? Will IDE tools make writing it easier?

hcrisp··on The moon dust problem facing scientists
They are looking at new seal designs, like an inner labyrinthine seal covered by a series of other seals.
hcrisp··on Study: ChatGPT outperforms physicians in quality, empathetic answers to patients
Indeed HLA-B27 only has a partial correlation with diseases such as AxSpa.

"... about 7 percent of Americans are positive for HLA-B27 but only 5 to 10 percent of people with a positive HLA-B27 will have AS" https://creakyjoints.org/about-arthritis/axial-spondyloarthr...

hcrisp··on Bard can now help you code in over 20 programming languages
> Show me a clever hack for using deque instead of vector in C++

Ans:

  // This function will reverse the order of a vector.
  void reverse(std::vector<int>& vec) {
    std::deque<int> deq;
    for (int i = 0; i < vec.size(); i++) {
      deq.push_back(vec[i]);
    }
    for (int i = 0; i < vec.size(); i++) {
      vec[i] = deq.front();
      deq.pop_front();
    }
  }

  This is a clever hack because it avoids the need to write a custom function for reversing the order of a vector.
But it did write a custom function?!
hcrisp··on Ask HN: Are there 3D twisty puzzles that can only be simulated on a computer?
Monument Valley?

https://www.monumentvalleygame.com/mvpc

hcrisp··on Mach 3.5 Over Libya in an SR-71 Blackbird
I built an SR-71 model rocket. It was Estes, not Revell, and looked like this [0]. It was very difficult to build compared to other models, because it had three cylinders with webbing for the fuselage and engines. I remember being disappointed that the two outer cylinders were not designed to take individual model rocket engines. There was only one in the center. I guess it would have been too hard to ignite them synchronously.

When I launched it (vertically of course), the plane seemed to hover forever on the launchpad before finally overcoming gravity and taking off. It did not achieve Mach 3.5 or anything significant for a rocket of its size. When it reached the ejection stage, it popped off the front cabin "nosecone", looking very ungainly as it fluttered to the ground on a parachute.

I still have that model somewhere downstairs.

[0] https://www.rocketreviews.com/estes-industries-sr-71-blackbi...

hcrisp··on New insights into why aspirin works so well
Also meloxicam, a higher potency anti-inflammatory tolerated by the stomach better than other options
hcrisp··on Pepsi Has a New Logo
Pepsi Zero Wild Cherry? Nice. Now drop the caffeine and you will have a real winner.
hcrisp··on Show HN: Play Codenames with ChatGPT
Very fun, similar to actual game. A couple times it didn't select the word that it says is close even though it could? Or picks words that aren't even among the list shown? That seems not to follow the rules.
hcrisp··on An insect that has the only mechanical gears ever found in nature (2013)
I was just thinking about this. Does folding your hands count as a gear? The interlocked fingers make for a tighter grasp. When viewed from the palm side they even look like a gear. It is not the natural state of the hands but many gears also spend time in an unmeshed state. What is the definition of a gear anyway?
hcrisp··on OpenAI tech gives Microsoft's Bing a boost in search battle with Google
Time to prepare three envelopes:

https://kevinkruse.com/the-ceo-and-the-three-envelopes/

hcrisp··on OpenAI tech gives Microsoft's Bing a boost in search battle with Google
That's who I thought of, but how can he go from leading the AI department which is behind to leading the company with AI ahead of the competition?
hcrisp··on OpenAI tech gives Microsoft's Bing a boost in search battle with Google
In another HN article comment someone mentioned that it took Google Brain over a year to replicate the DeepMind AlphaZero code even though they are part of the same company. Yeah, I think there are barriers to communication there.
hcrisp··on Stealth bomber crashed in field on Google Maps (2022)
Report claims the damage estimate was $10M. Each bomber costs $1.1B, so it was 0.1% of the full unit cost. Similar to a $300 fender-bender on your $30K car.

https://www.military.com/daily-news/2022/12/21/air-force-fin...

hcrisp··on Stealth bomber crashed in field on Google Maps (2022)
Left landing gear collapsed when landing, causing it to skid off runway. More info:

https://theaviationist.com/2022/03/18/weak-landing-gear-spri...

hcrisp··on Launch HN: Electric Air (YC W23) – Heat pump sold directly to homeowners
I agree, in fact a couple things in the pitch don't add up.

> ... where the 80M single family homes in the US replace their furnaces with heat pumps.

Where did they get this statistic? I already have a heat pump and know many that do too. Are we included in this 80M estimate? What about those in the northern half of the US that also need back-up heat for when it is very cold? They aren't going to replace their furnaces with a heat pump. They might add one to their setup but replace, no.

> In addition the process of getting a heat pump is painful, including finding a trustworthy contractor, sorting out financing, and wading through rebates. And finally contractors struggle with installs because of the difficulty of properly sizing the system, and understanding if your duct work is compatible with a heat pump

I don't know the contractors they are talking about, but I literally had to say the words "heat pump" to my local Carrier installer and they did all the rest.

hcrisp··on Show HN: I built an autopilot for the lunar lander game
This is a different lunar lander than you are maybe thinking. It looks more like SpaceX's Starship than an Apollo lunar module. I don't think it has been made into a gym env yet but that would be great if it is!
hcrisp··on Show HN: I built an autopilot for the lunar lander game
Yes, I would like to see the environment ported to Python, wrapped in gym, and given a good shaped reward, i.e. like reward = prior_height_delta - (height - target_height) - fuel_cost. Run Stable Baselines PPO or DQN on that and it should converge to something close to an optimized MPC controller.
hcrisp··on A taste of Brazil: How guaraná soda became a national icon
Several sites I found list Guaraná Antarctica as having 30 mg of caffeine vs Coke's 34 mg [0]. It is also similar in sugar content contrary to what I initially found.

[0] https://sodapopcraft.com/what-is-guarana-soda/

hcrisp··on A taste of Brazil: How guaraná soda became a national icon
I love Guaraná and agree that Antarctica is the superior brand! Wikipedia describes the taste as "mild and slightly apple-like, with a berry after-flavour" [0] but I agree it is more like ginger ale or like spiced ginger beer. It is pronounced "gua-da-NAH".

It is also called "Brazilian champagne" [1], has as much caffeine as Coke, but much less sugar even though it tastes as sweet due to the Guaraná taste.

[0] https://en.m.wikipedia.org/wiki/Guaran%C3%A1_Antarctica [1] https://sodapopcraft.com/what-is-guarana-soda/

hcrisp··on Out of the Tar Pit (2006) [pdf]
Chapter 1 of The Mythical Man Month by the same author is called "The Tar Pit" and has this memorable opening paragraph:

> No scene from prehistory is quite so vivid as that of the mortal struggles of great beasts in the tar pits. In the mind's eye one sees dinosaurs, mammoths, and sabertoothed tigers struggling against the grip of the tar. The fiercer the struggle, the more entangling the tar, and no beast is so strong or so skillful but that he ultimately sinks.

> Large-system programming has over the past decade been such a tar pit, and many great and powerful beasts have thrashed violently in it...

hcrisp··on Warner Brothers Plans Revamp of LotR
A film trilogy made from one children's book? Certainly felt "thin and stretched out, like butter spread over too much jam".
hcrisp··on Earth’s innermost layer is a 644 kilometer wide ball of iron, new study finds
Does the athenosphere produce surface lava?
← PreviousPage 2 of 14Next →