HNHacker News
TopNewBestAskShowJobs

captaincrowbar

1,162 karma · joined May 24, 2010

submissionscomments
captaincrowbar··on A Sun-like star orbiting a black hole
G is the apparent magnitude in the green part of the spectrum. Astronomers have a standardised set of optical bandpass filters to record the brightness of a star at various wavelengths - U (ultraviolet), B (blue), V (visual), G (green), etc. Using the letter ID of the filter to mean "apparent magnitude as seen through this filter" is a common convention.
captaincrowbar··on Passkeys.io – A Passkey Authentication Demo
Tried entering my email. Fail 1 - doesn't allow autofill.

Then tried signing in. "Enter the passcode that was sent to <email>." Fail 2 - no passcode was ever sent. (Yes, I tried the resend button multiple times, because I'm not a moron. Yes, I checked my spam folder, because I'm not a moron. I know the HN crowd would have taken great pleasure in explaining the obvious to me if I hadn't mentioned it.)

Even if that had worked, how is copying a code from unencrypted email supposed to be either easier or more secure than a password? Fail 3.

captaincrowbar··on Apple Reports Third Quarter Results
“having to use a slightly different OS to get a totally better CPU performance”

FTFY

captaincrowbar··on Deepest infrared image of universe
"From our home on the Earth, we look out into the distances and strive to imagine the sort of world into which we are born. Today we have reached far out into space. Our immediate neighborhood we know rather intimately. But with increasing distance our knowledge fades, and fades rapidly, until at the last dim horizon we search among ghostly errors of observations for landmarks that are scarcely more substantial. The search will continue. The urge is older than history. It is not satisfied and it will not be suppressed." -- Edwin Hubble
captaincrowbar··on Things I wish everyone knew about Git (Part I)
Obligatory https://xkcd.com/1597/
captaincrowbar··on Ask HN: Am I going insane or is there genuinely no value in blockchain tech?
There is genuinely no value in blockchain tech. However, I regret that I am not qualified to help you with the other part of your question.
captaincrowbar··on Quiet glimpses of the turn of the century NYC through an amateur’s camera
Proposed: That we are far enough into the 21st century now that “turn of the century“ should default to meaning 2000, not 1900.
captaincrowbar··on Finding your home in game graphics programming
The term you're looking for might be "abstraction penalty".

For tools that can identify where the bottlenecks are, I recommend watching Emery Berger's talk "Performance Matters" from CppCon 2020 (either of the two links below should work). He introduces some innovative new profiling tools for this sort of analysis.

https://www.youtube.com/watch?v=koTf7u0v41o

https://www.youtube.com/watch?v=VzyhpbrC2Bs

captaincrowbar··on Technology Behind the Lilium Jet
First Law of Aviation: Take-off is optional, but landing is compulsory.
captaincrowbar··on Ask HN: What's the next big thing in computing / programming?
(1) The cloud will continue to grow. Cloud-related stuff like Azure and Docker will continue to be a good learning investment.

(2) Once Microsoft work enough of the bugs out, which I'm guessing will take another 2-3 years, I suspect Windows on ARM will be the Next Big Thing, or at least one of the Big Next-ish Things. ARM supplanting Intel will be a general Thing.

captaincrowbar··on Show HN: I made an app that tracks your devices' batteries from your Mac
Tried to contact you but can't find your address.
captaincrowbar··on Show HN: I made an app that tracks your devices' batteries from your Mac
I like the idea, and I'd be happy to pay for it if it worked properly, but I can't get it to see my iPad. I followed the procedure at the bottom of your page but it still doesn't work. My iPhone shows up (didn't need to do anything for that) but I can't get the iPad to work.

A couple of other issues:

- The linking procedure is poorly explained. It took me a while to figure out what you wanted me to do. (Maybe I still got it wrong.) Showing devices in Finder is a feature most people have probably never heard about - who has any reason to physically plug a device into a Mac these days? I had never seen that screen before.

- I suspect you only tested this on laptops, because it tries to show the battery status of my desktop iMac and reports "Battery 0% Power Source: Unknown" :)

captaincrowbar··on Rare Greek Variables
For maximum troll points, use "variant pi" and "lowercase omega with macron" for two different variables in the same paper.
captaincrowbar··on AI movie posters
In the poster for Bill & Ted's Excellent Adventure, it looks like the AI caught "time travel" and "phone booth" and tried to draw a whole bunch of TARDISes.
captaincrowbar··on PostgreSQL Subtransactions Considered Harmful
"One of the basic issues with subtransactions is that they increment XID – the global transaction ID."

If the subtransaction is later rolled back, this is starting to sound like the kind of speculative execution information leak that led to the Spectre attack. I wonder if you could base a similar attack on this?

captaincrowbar··on Surprising Shared Word Etymologies
My favourite example of apparently unrelated words with an unexpected common root: "government" and "cybernetics" both come from the Greek "kubernetes" (helmsman).
captaincrowbar··on Requiem for a Bright Idea (1999)
No, it isn't. Nobody was talking about blockchains that far back. What this is about is the early pioneers of the commercial digital payment market that was eventually dominated by the likes of Paypal and Stripe.
captaincrowbar··on How a Bad Random Number Generator Froze Sway (2020)
Why does a JSON parser need a random number generator anyway?
captaincrowbar··on What is life? Its vast diversity defies easy definition
What is life?

A forkbomb implemented in hardware.

captaincrowbar··on “555” and related telephone prefixes
When I lived in New Zealand, I once had an American caller ask me for the number of our other office, which happened to start with 555 (which has no special significance in NZ). It took me some time to convince her that I wasn't trying to fob her off with a fake number, because obviously everybody knows 555 numbers aren't real.
captaincrowbar··on The Culture War: Iain M. Banks’s Billionaire Fans
Oh, I agree. But the article is about the apparent contradiction: what do ultra-capitalists like Musk and Bezos see in a series about a communist utopia?
captaincrowbar··on SoftBank’s plan to sell Arm to Nvidia is hitting antitrust wall around the world
"Why don't they just switch to RISC-V?" is the new "This will be the year of Linux on the desktop".
captaincrowbar··on DeLorean considering all-electric reboot
For sale: Slightly used DeLorean. Only driven from time to time.
captaincrowbar··on That's not how 2FA works
Maybe they can pioneer 5fa.
captaincrowbar··on RDRAND on AMD Ryzen 9 5900X is flakey
tl,dr:

(1) There's no evidence of anything wrong with AMD's RNG.

(2) Lots of people on Github and HN don't understand the birthday paradox.

captaincrowbar··on Happy New Year HN
Bye 2020, don't let the door hit your ass on the way out.
captaincrowbar··on Source of the famous “Now you have two problems” quote (2006)
Some people, when confronted with a problem, think “I know, I'll use floating point.” Now they have 1.999998 problems.
captaincrowbar··on That’s not why I did it
"For all of you out there who have ever had to deal with the warp from hell, remember that there is something healing in finally controlling that which would not be controlled, something triumphant about making something from total chaos."

Today in "Unexpected WH40K quotes"...

captaincrowbar··on Silicon MacBook could launch on 27 October and cost $800
Apple are usually careful not to announce new hardware until it's just about ready to ship (with the occasional exception coughAirPowercough), but in this case (assuming the report is correct) I suspect they'll be making an exception. Four months between announcing Apple Silicon and the first hardware hitting retail seems far too short for developers to properly prepare. So I'm guessing that this will be an announcement well in advance of hardware shipping, maybe early next year, to give developers a clear target to aim for (both a hardware target and a calendar target).
captaincrowbar··on A Short History of Color Theory
"Colour has three dimensions" is a fact about human anatomy, not physics.
← PreviousPage 2 of 7Next →