Hacker News: tomerv

New comment by tomerv in "MAR1D: First-Person Mario"

tomerv — Wed, 12 Oct 2022 17:32:57 +0000

Something like this?

New comment by tomerv in "How fateful?"

tomerv — Wed, 05 Oct 2022 11:23:15 +0000

I think that's a common misunderstanding about who owns what in a marriage. I'll quote Matt Levine on this:

One thing that I find a little weird about the Bezos divorce is that there are a lot of claims that it will make MacKenzie Bezos “the world’s richest woman.” I suppose there is a technical sense in which that is right, but it assumes not only that she will have a right to half of Jeff Bezos’s assets in divorce, but also that she has no such right in marriage. That strikes me as a strange way to think about marriage, and about the “community property” laws that might give her half the assets in divorce. (Surely those laws imply that she is in a sense a joint owner now?) I would have thought the more straightforward analysis is that she is the world’s richest woman now, because she is a member of a married couple that has more money than any other single person or married couple on the planet, but I guess that is not how the scorekeeping works.

https://www.bloomberg.com/opinion/articles/2019-01-10/bezos-...

New comment by tomerv in "How fateful?"

tomerv — Wed, 05 Oct 2022 01:19:16 +0000

The incentive to do what exactly? Break up a good marriage to get half of the common assets (minus many many expenses)? How is that better in any way?

New comment by tomerv in "Everesting – Climb the Equivalent of Mt. Everest"

tomerv — Sat, 01 Oct 2022 08:52:01 +0000

In Haifa (Israel) there was a staircase race a few years ago, from sea level to the top of the city going up more than 1000 stairs. One version of this was doing it over and over so that the total is the height of the Everest. I'm pretty sure there were several runners who finished that successfully.

https://haipo.co.il/item/9221

New comment by tomerv in "Choose the smallest number not chosen yet"

tomerv — Fri, 30 Sep 2022 00:38:10 +0000

All the other answers in the thread focus on maximizing head-to-head score. I'll try to answer the question for the goal of greedily maximizing your own score.

Using the same definitions from the article, we now have (for a 2 person game):

  Q_i = -P_i + (1 - sum_{j=1..i}(P_j))

Where the first term is for the case of choosing the same number as your opponent, and the second when it's larger than your opponent.

Now solve the same set of equations, but with our new Q_i. Solving Q_1 = Q_2 analytically is easy, then Q_2 = Q_3 and so on... You get P = (1/2, 1/4, 1/8, ...)

So that's the result for this specific 2-player game. You could also ask about the 2-player game with tie=t for any negative t (the above is for t=-1). Now we get

  Q_i = t*P_i + (1 - sum(P_j))

Again, solving Q_i=Q_{i+1} is easy and gives

  P_{i+1} = (t / (t-1)) * P_i

For example, if t=-2 then (using the fact that all P_i's sum to 1): P = (1/3, 2/9, 3/27, ...)

I did not try to tackle the 3-player game with tie=t.

New comment by tomerv in "Show HN: I may have created a new type of puzzle"

tomerv — Sun, 18 Sep 2022 16:29:02 +0000

The path with that label is blocked unless the condition is fulfilled. I don't think it relies on any prior knowledge (at least nothing specific I can think of)

New comment by tomerv in "Integer Conversions and Safe Comparisons in C++20"

tomerv — Wed, 14 Sep 2022 07:17:56 +0000

On the contrary, it should be on by default for every build configuration! If you move to a newer compiler version and the compilation breaks, then you just saved yourself valuable debugging time. The alternative is that the new compiler has a new optimization that causes your code to break in runtime. You can always disable specific warnings if you think they're not relevant for your code.

New comment by tomerv in "Don't ignore the janitor"

tomerv — Tue, 06 Sep 2022 14:13:17 +0000

That really depends on the local culture. Don't Assume all cultures are like yours.

New comment by tomerv in "Brad Pitt’s housing dream for Hurricane Katrina survivors turned into nightmare"

tomerv — Thu, 18 Aug 2022 04:18:42 +0000

GP had a typo, it's 109 houses.

New comment by tomerv in "Twitter says Musk’s spam analysis used tool that called his own account a bot"

tomerv — Sat, 06 Aug 2022 15:08:49 +0000

> Musk signed a contract with an exit clause.

There are some exit clauses (like Musk not getting financing from his banks) but they don't apply here. Specifically, there's no exit clause for the bot percentage.

> If it was a promise it could be written on a hallmark card.

Are you just trying to change the meaning of the word promise? Most people would agree that if you break a promise you pay a price - it might be a social one in case of a promise between friends. Or it might be a financial price in case of a written & signed promise, a.k.a a contract.

New comment by tomerv in "The Problem with Speed Cubing [video]"

tomerv — Sun, 24 Jul 2022 15:38:06 +0000

The music is top-notch, especially the timing of the drums with the presentation!

New comment by tomerv in "Do breastfed children have higher IQs? The answer is annoyingly hard to uncover"

tomerv — Sat, 16 Jul 2022 07:03:06 +0000

> Breastfed children tend to have less stomachaches.

Maybe on average, but specific cases can vary wildly. Some foods that the breastfeeding mother consumes can cause issues. Milk, soy, and caffeine are known troublemakers - but good luck finding out which one is the source of stomach issues for your baby!

New comment by tomerv in "“Critical” projects and volunteer maintainers"

tomerv — Sat, 16 Jul 2022 06:34:33 +0000

It's already in the article.

New comment by tomerv in "ISO name change for Türkiye"

tomerv — Tue, 12 Jul 2022 08:59:44 +0000

Follow-up question: what if other countries follow suit, especially ones that don't use a Latin-based alphabet? Egypt is formally called "جمهورية مصر العربية" in its native language - should that be recorded as the ISO Full name for EG?

New comment by tomerv in "ISO name change for Türkiye"

tomerv — Tue, 12 Jul 2022 08:55:02 +0000

Turkey -> Türkiye

New comment by tomerv in "AutoRegex"

tomerv — Sat, 09 Jul 2022 11:19:07 +0000

http://regex.inginf.units.it/extract/

New comment by tomerv in "It's quite hard to lose a Duolingo streak"

tomerv — Sun, 03 Jul 2022 12:52:45 +0000

Same here. In fact I lost my 1000+ day streak 2 months ago (a newborn will do that to you) and haven't done a single Duolingo lesson since then. However, I did replace it with another app called DuoCards (no relation to Duolingo, AFAICT) which is great for memorizing vocabulary using spaced repetition. Duolingo used to have a companion app that did something similar, but they closed it a year ago. Anyway, they lost my subscription.

New comment by tomerv in "FCC commissioner wants TikTok removed from app stores over spying concerns"

tomerv — Wed, 29 Jun 2022 20:31:24 +0000

> If you are OK with Texas leaving the union, then you are entitled to support Taiwan independence.

That just doesn't make any sense.

New comment by tomerv in "Advancing the state of the art for std:unordered_map implementations"

tomerv — Mon, 20 Jun 2022 07:52:08 +0000

Now I'm curious to know what's the state of the art for open addressing implementations in C++.

New comment by tomerv in "Advancing the state of the art for std:unordered_map implementations"

tomerv — Mon, 20 Jun 2022 07:50:42 +0000

There's a link in the article to a paper (N2023) proving this is not constant time. The issue is that as you delete elements, and the hash table becomes sparse, finding the next nonempty bucket is not so fast. However, I believe that the paper conveniently glosses over the fact that there will be rehashing into a smaller table which would fix this issue.