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Ask HN: Teach me something new

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681–690 of 782 posts

Re: Ask HN: Teach me something new

#681
post #138

Bootstrappable Builds is one of the more important and hard open software projects today. Going from 512 bytes of machine code plus a ton of source code all the way up to a full distro. https://bootstrappable.org/

Odd that the wiki (but not the projects section on the homepage) mentions Guix, which seems to be doing a lot in this and the reproducible builds space: https://guix.gnu.org/en/blog/2020/guix-further-reduces-boots...

Re: Ask HN: Teach me something new

#682
post #258

The number of legal chess positions has now been estimated with 2 digits of accuracy as ~ 4.8 x 10^44: https://github.com/tromp/ChessPositionRanking For the game of Go, we know all 171 digits of the number: https://tromp.github.io/go/legal.htm

The 2nd link for go gives me a 404.

Re: Ask HN: Teach me something new

#683
post #433

Filipino and Polynesian languages come from the same linguistic branch, and their numbers are similar for most and the same for some.

It's over 11,000 km from Malaysia to the Cook Islands, yet the number 5 is lima in Malay and rima in Cook Islands Maori.

Apparently it's also rima in Rapanui, the language of Easter Island near Chile.

And the number two is even crazier, being roa in Malagasy and rua in Rapanui, so this word is shared from Madagascar all the way to Easter Island.

https://en.wiktionary.org/wiki/rima#Rapa_Nui

https://en.wiktionary.org/wiki/rua#Rapa_Nui

https://en.wiktionary.org/wiki/roa#Malagasy

Re: Ask HN: Teach me something new

#684
post #567

There is a small but growing community of people who eat only raw fruits and raw vegetables. I tried it and it was awesome (though it was expensive and I had trouble getting quality produce). I find this community very knowledgeable, smart and down to earth. It was impressive to see a 40+ year old body builder (he is no Arnold, but has impressive physique for an amateur) doing so well on this diet. If someone is inte…

Isn’t that what Steve Jobs did before he died?

Yes, but he tried it too late. It is not like cancer would go away by eating fruits for a few weeks. Also eating raw diet doesn't mean one should not get modern medical treatment, especially for killer diseases like cancer. It would take years to undo decades of bad eating habits.

Eating raw is not a panacea. But it is a solid step in getting and maintaining a healthy body and mind, especially as one ages.

Re: Ask HN: Teach me something new

#685
post #136

Earlier quoted context omitted.

> also anyone know how is lymph pumped? I don't think the heart pump lymph so is it stagnant? I have a close friend who is working on getting certified as a massage therapist. Skeletal, muscular, and vascular anatomy make up a big part of the required knowledge for the certification. Two interesting things I learned from them: 1. The lymphatic system is massive and runs alongside our vascular system. For example, the…

Do they talk about enforcing good cardiovascular health and PE as a way to maintain lymphathic drain too ?

No idea, but from what I’ve head it’s commonly understood that people who regularly move and exercise will generally have better lymph circulation for that reason.

Re: Ask HN: Teach me something new

#686

The study of unidentified aerial phenomena (UFOs) and the acknowledgement of the extraterrestrial hypothesis (or extra dimensional) will become mainstream. https://www.gillibrand.senate.gov/news/press/release/gillibr... Soft disclosure has happened already via the USS Nimitz encounter. If UAPs are true, then the floodgates are open and will lead to a forced re-evaluation of other high strangeness phenomena (telepathy…

I always found it strange how UFOs concentrate in the U.S,is it because of the climate? /s I wanted to believe and there is a serious subreddit for UFOs but most are debunked. There exist ~2 truly mysterious UFOs and most of their mystery has been explained.

> UFOs concentrate in the U.S.

Obviously it's because when the aliens want to talk to the authorities, they go to the Supreme Democratic Leader of Earth.

Re: Ask HN: Teach me something new

#687

Arithmetic with Roman numerals. You often hear that it was next to impossible to calculate with Roman numerals. That's not true at all. People developed a very ingenious scheme to do additions and multiplications using pebbles. Since the word for pebble in Latin is calculus, we now call calculus calculus. How did it go? You represented the digits of a number by a pebble. You drew some lines in the sand, some rows and…

(continued)

Multiplication of Roman numerals.

Here we need 3 columns, one each for the multiplicands and one for the result.

Our example will be 12 * 61 = XII * LXI. I chose this example so that we don't need to use negative digits; negative digits can be handled easily, but you can get the idea without them.

We start with the operands on the first two columns. 12 has one pebble at the X row and 2 at the units row; 61 has one pebble at the L row, one at the X row and one at the I row. The column for the result is now empty.

  D   |    ||   
  C   |    ||
  ———————————————
  L   | o  || 
  X o | o  ||  
  ———————————————
  V   |    ||   
  I oo| o  ||  
  ———————————————
We start removing pebbles from the first multiplicand. For each pebble in the multiplicand, we perform the multiplication with the second multiplicand, which in our case means we "copy" the multiplicand in the results column with an appropriate shift in rows. Since the first mutiplicand has 3 pebbles, there are three steps:

Step 1:

  D   |    ||   
  C   |    ||
  ———————————————-
  L   | o  || o
  X o | o  || o 
  ———————————————-
  V   |    ||   
  I o | o  || o 
  ———————————————-
Step 2:

  D   |    ||   
  C   |    ||
  ———————————————-
  L   | o  || oo
  X o | o  || oo 
  ———————————————-
  V   |    ||   
  I   | o  || oo 
  ———————————————-
Step 3:

  D   |    ||    o   
  C   |    ||    o
  ———————————————-
  L   | o  || oo
  X   | o  || oo o
  ———————————————-
  V   |    ||   
  I   | o  || oo 
  ———————————————-
So, the result is DCLLXXXII. Of course, LL is not really "legal", so we replace it with a C, so we get DCCXXXII, or 732, which is indeed the correct number.

Re: Ask HN: Teach me something new

#688

Earlier quoted context omitted.

Me too! Btw, in the spirit of the title of this thread, in English you would say "as a French person". In the past, "Frenchman" was used but it's understandably out of favour these days. "French" can be used as an adjective but not a noun in this context. It's a very common error, I suppose since "français" can be used as an adjective or a noun en français :)

And don't forget french as a verb! -said every high school guy ever

Ha! Indeed!

In fact in informal Quebecois French, it's also used as a verb, with the same meaning as in English.

As in "J'ai Frenché ma blonde" --> "I Frenched my girlfriend"

Re: Ask HN: Teach me something new

#689
post #684

Earlier quoted context omitted.

Isn’t that what Steve Jobs did before he died?

Yes, but he tried it too late. It is not like cancer would go away by eating fruits for a few weeks. Also eating raw diet doesn't mean one should not get modern medical treatment, especially for killer diseases like cancer. It would take years to undo decades of bad eating habits. Eating raw is not a panacea. But it is a solid step in getting and maintaining a healthy body and mind, especially as one ages.

IIRC he had started this diet (eating only raw carrots and strawberries) before he founded apple with woz

Re: Ask HN: Teach me something new

#690

Van Gogh killed himself one year after Nintendo was founded. Betty White was born before Anne Frank.

Anne Frank, MLK Jr. and Barbra Walters were all born in the same year.

Heidegger, Hitler, and Wittgenstein were all born in 1889

Hitler and Wittgenstein attended the same school even

The Wittgenstein family also had all of their funds invested in America before the outbreak of WW2

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