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If I am a Robinhood customer who is investing for the long term instead of day trading - should I care?


No for a few reasons.

All the other major retail brokerages do this, unless they allow you to provide specific routing instructions (which usually comes at a cost, but I haven't checked lately). Everybody's doing it doesn't make it right, but it makes it unavoidable.

It's actually usually good for you --- your brokerage has a duty of 'best execution', so they can only route your trades to the HFT when the quotes are the same or better and they expect the HFT trade to complete as well as if they routed it to the other market. Often that means you'll get a better price, or more likelyhood of a complete trade, but some tradea might have executed better at another venue.

There's much bigger things to care about, like your brokerage's track record of availability or lack thereof during the trading day, how confusing their UI is for the things you want to do, if their means of access work with you (some people want local offices, which excludes some brokerages), fees and charges for services, including hidden fees like below market interest on deposits or above market interests on margin loans (but please don't have margin loans, cause it's usually a bad idea), etc.


not investment advice: no, you shouldn't. the spreads you get can be tighter (good when you want to buy and sell), and any hypothetical front running of your order would lead to miniscule slippage over the long-run. buying SPY and TLT is more or less the same experience in robinhood as it is in schwab, TDA, etc.

even as a day trader i wonder if it matters. i would be more annoyed that RH doesn't allow options on indices or futures, which leads to RH traders loading up on similar-but-not-identical products (eg USO as a substitute for oil futures or whatever VIX etf's remain standing)


> They just need to be put into boiling water for a few minutes to kill sars-cov-2 at 100%.

I was looking for information on (high) heat killing viruses such as sars-cov-2. Are you able to point to a reliable source on this?


Heat at 56°C kills the SARS coronavirus at around 10000 units per 15 min (quick reduction).

Hence I'd assume that boiling will be reasonably effective.

Source: WHO https://www.who.int/csr/sars/survival_2003_05_04/en/


Are you aware of any viruses not killed by high heat?


According to an article on Quora, "At What Temperature Do Viruses Die?" ¹, for what it's worth:

> All [known] strains of virus can be inactivated at 70 °C.

For reference, an autoclave used for sterilization is around 121 °C.

> A minimum temperature range to inactivate most virus is 48°C to 60°C. Some virus still able to survive at temperature below 60°C e.g. adenoviruses(dsDNA naked virus) relatively thermostable, it able to withstand temperature at 56°C for 10min.

¹ https://www.quora.com/At-what-temperature-do-viruses-die-1


Viruses exist where there is life, it's not a mound I'm willing to die on, but it's accurate here on Earth. There is life that lives in temperatures higher than 70 °C, therefore there are viruses that can survive in temperatures higher than 70 °C: http://www.rcn.montana.edu/Publications/Pdf/2005/4_18Young.p...


Thank you, I stand corrected! Please everyone disregard my previous comment and find a more reliable source of facts.


There can be some or many kinds of viruses that survive under all sorts of conditions, by that doesn't necessarily imply that a particular virus does so as well.


The question was of any virus not a particular virus.


I imagine viruses from underwater volcanic plumes would be pretty heat tolerant. But I don't know if they are a danger to humans or if we are too cold to host them.


How hot is high heat? There are viruses that infect archaea that live in extreme conditions including near-boiling water.


> I was looking for information on (high) killing viruses

They're not really alive, so they can't be killed. But you can destroy vital parts of them and make them unable to reproduce.

https://en.wikipedia.org/wiki/Denaturation_%28biochemistry%2...


Respectfully, I wish people would stop popping into discussions about coronavirus to say "Actually, ...".

Most educated people know that viruses aren't alive in the traditional sense. People who aren't as educated simply don't care, and I don't blame them. Using the more scientifically precise term helps nobody, except scientists, in this situation.

Should software engineers stop using the word "kill" in POSIX-land because CPU processes aren't really "alive"? Give me a break.


I didn't bat an eye at this until you dropped in with a "Respectfully..." that sounded awfully insincere. Did your sentence really intend to convey respect? Because it came off as disingenuous.


You're searching for malice where there is none. I said nothing disrespectful.


> Respectfully, I wish people would stop popping into discussions about coronavirus to say "Actually, ...".

I answered his question while also correcting a minor mistake. Also I'm not sure what you're quoting there.

> Most educated people know that viruses aren't alive in the traditional sense. People who aren't as educated simply don't care, and I don't blame them.

Are you trying to insult your grandparent? Most people on HN aren't willfully ignorant and are quite open to new knowledge.


It’s controversial. Some would characterize viruses as alive (because they replicate and evolve). So it’s fair to say that you can kill them (prevent from replicating). Debating the semantics of this is not helpful.


And in the non-controversial case - i.e. prions, people generally don't use the term "kill", they use the term "deactivate".


Debating the classification of life, while otherwise interesting, should not derail a conversation about practical steps to fight an ongoing pandemic.


Do you know if the other countries you mentioned have equivalent documents to the one you linked for Belgium?


Unlike in C# pattern matching in F# is exhaustive. I’m guessing this is what was meant by “better”.


Yes, i find that a good argument especially if you plan on using this feature a lot it can save you from shooting yourself in the foot. It also is a better idiom in F#, nicer to grok, but that’s subjective.

However, only direct experience will make you reconsider.

I’ve seen a discriminated union implementation in C# the other day and was repulsed.


I use OneOf<T...> in C# a lot now. If you’re thinking of the same one I am the only ugly thing about it is the code-generation required to generate all of the variations from OneOf<T0,T1> to OneOf<T0,T1,T2,T3,T4,T5,T6>.


This is mentioned elsewhere in the comments at least some of the code for climateprediction.net appears to be on GitHub: https://github.com/CPDN-git.


“13 Minutes to the Moon” by the BBC World Service.


Any chance you have an example of this pattern you can point to? Also, would the use of Span<T> make it possible to do this without unsafe code?


I use it with DeviceIOControl for interoperating with a driver.

I didn't learn by following someone's example, in my case, I have to work with so many different structs in a high performance use case that I took the time to re-learn pointers. (Haven't used them in years.)

1: Memory is allocated using new byte[bufferSize]

2: That byte[] is pinned to a byte* or void* via fixed

3: The pointer is passed to DeviceIOControl

4: Traditional c-style typecasting inside of fixed

5: Traditional GC cleans up your byte[]. This avoids problems with managed programs that allocate lots of native memory.

I don't know how to use pointers with Span<T>...

BUT: I do similar things with ArraySegment<byte[]>. All that's needed is pointer arithmetic:

ArraySegment<byte> arraySegment = ...

fixed (byte* dataArrayPtr = arraySegment.Array)

{

   var dataPtr = dataArrayPtr + arraySegment.Offset;

   var ptr = (SomeStruct*)dataPtr;

}


I recently learned about MemoryMappedFiles in .NET. https://docs.microsoft.com/en-us/dotnet/standard/io/memory-m...

I only mention it because I'm not entirely clear on what is going on or how it works (largely because I tend to only be able to learn things by doing them, which is my own issue, not your failure to describe it), but after reading the docs on MemoryMappedFiles, I wonder if it's something that could be useful to you.


One of the harder things with English pronunciation I found was to be able to correctly vocalise "warm" and "worm", "crap" and "crepe" and similar. Think a resource like this would have helped.


> binding system that's full of footguns

Please elaborate?


Seealso: IntelliCode for Visual Studio.


I also found for Code, https://visualstudio.microsoft.com/services/intellicode/

however when I try to install it on Mac OSX, I get

Couldn't find a compatible version of Visual Studio Intellicode - Preview with this version of Code


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