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JonC

@ jonc211 @programming.dev

Posts
2
Comments
73
Joined
3 yr. ago

  • EV Batteries Can Outlast A Vehicle’s Lifetime With Minimal Degradation, Study Finds - The battery degradation rate in modern EVs has gone down by almost a quarter in the past five years.

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  • An annual degradation of 1.8% over 20 years gives more than 69% capacity the end of the period, so it’s better than what you posted.

    Each year, you have 0.982 of the previous year’s capacity (1 - 0.018), so the capacity at the end of the 20 years is 0.982 ^ 20.

  • Friday Facts #429 - Vulcanus Demolisher Enemies | Factorio

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  • I was unsure about this as I read the start of the article. The territories system allays most of my concerns though. It basically puts the onus on you to go and pro-actively defeat the worm that owns the territory before expanding into it.

    If it had been the case where the worms can come and attack you wherever you are, I think that would have been a nightmare. Glad there seems to be a reasonable balance.

  • Sorry, Iceland.

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  • But it’s not a mini pig. It’s over 200 miles long

  • Reactivity and Reactive Programming [Blog Post]

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  • Why the assumption that reactivity is only a front-end thing?

    I’ve used it plenty on the back-end when dealing with streams of data that need to trigger other processing steps.

  • ELI5: Why is high frequency trading allowed?

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  • I mean, why does anything have value?

    In the strict financial sense, something is only worth what somone else is willing to pay for it. That's the whole premise of financial trading. Getting a bit beyond ELI5 now, but most exchanges use something called a Central Limit Order Book (CLOB) to let the participants in the market see who wants to buy and sell what and for how much, and also to match those buyers and sellers. This is a good intro: https://optiver.com/explainers/orders-and-the-order-book/

    In terms of shares in companies, then they do have some fundamental value according to the market. If you buy a share in the company, you get a share of the profits (paid as dividends), which gives those shares some value. Obviously, there's a lot of speculation too as people are involved, so emotions and wild predictions can come into play!

    Financial instruments that get traded aren't limited to shares in companies though. There are all kind of other financial instruments that get traded every day, some are pretty basic like buying and selling different currencies. Others involve all kinds of crazy financial engineering , like the sort that caused the crash in 2008!

    Most have some fundamental value based on their attributes, so it's a little different to the likes of an NFT. The big issues come if the values that the market has agreed upon don't match reality, which is what happened in 2008.

  • ELI5: Why is high frequency trading allowed?

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  • If you strip things back, the most fundamental point of a market is to bring buyers and sellers together and to enable price discovery.

    The price of a financial instrument you see on a stock exchange or similar is simply the last traded price between a buyer and a seller. If you want to buy or sell something, then the price you get depends on who wants to sell/buy on the other side and what price they have put an order in for.

    The more trades going on in the market, the more likely it is that you will be able to buy at a price close to what you see as the last price in the market.

    If you only allow trading every hour, then you lose some of that price discovery.

    Additionally, as already mentioned, trades would likely still happen, but away from the designated marketplace. If I want to sell something, then I may just ask who else has the thing I want to sell and try to negotiate a price directly with them.

    That way, fewer trades happen in the marketplace and more trades happen in private away from there.

    That sort of limited trading does happen for some very niche products that don’t have a lot of potential buyers and sellers. For common financial instruments, have a lot of participants wanting to trade, having a centralised marketplace helps avoid the issues that would come otherwise.

    Now, you can argue that in practice it doesn’t work as well as the theory, and I would agree there. If you are a HFT, then you can make money by getting in milli or microseconds ahead of others.

    For a lot of market participants, that doesn’t really matter though. The big banks typically don’t do that sort of trading. They are buying and selling on behalf of their clients, both individuals and companies that want access to the market. The bank makes their money by charging a margin to their client (similar to how it works for pretty much any retailer), and the fact that the HFTs are making all these trades helps them with price discovery and liquidity (ensuring there is someone to buy what they want to sell, or sell what they want to buy)

  • I know which one I'd rather hang around, and it wouldn't be the annoying loser who played the clarinet.

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  • What a guy!

  • Borderline criminal

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  • Although filling an entire trunk full of peanut butter, let’s say 500kg worth (assume a 450 litre trunk and density of 1.1 kg/l according to Google), then adding all that weight over the rear axle would affect the handling and balance of the car, potentially making it dangerous and therefore illegal to drive.

    So, it’s not actually that clear cut that it wouldn’t be illegal!

  • What's your favourite Star Trek theme?

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  • First Contact main theme > all

  • TIL how offside actually works in soccer (football)

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  • Yeah, it’s one of those scenarios that happens so infrequently that people rarely think about it.

    Until it does happen and then everyone gets confused!

  • TIL how offside actually works in soccer (football)

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  • Technically, the line is at the second to last opponent in the direction of attack.

    The usual case is that the goalkeeper is the last opponent, so the line is at the last defender. If the keeper comes forward past some of the defenders, then the line would be at the second last defender.

    The attacker also has to be ahead of the ball to be offside, which doesn’t seem to be mentioned in the link. You could have two attackers, both in offside positions, but if the one with the ball passes to the second attacker and the second is behind the ball when the pass is made, then it is not offside.

  • Have you ever realized just how broken you are?

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  • So I deleted the story before I posted it, and began to realize that even though I'm 40, and should be past all this, it still hurts, and I'm a deeply broken person.

    The thing about trauma (and it likely is trauma) is that it often just doesn’t go away on its own and you need to do work on it. So, why should you be over it?

    Should is a loaded word as it pretty much always comes from what you learned as a child. You should do that. You should be like this.

    That “should” probably comes from your father when he told you how you should be as a child.

    It sounds like you aren’t over it now, but that’s ok. It’s ok not to be over stuff that happened in childhood. But the important thing to understand is that you can get over it with work. Being aware of that is the first step on that road.

  • [Tom Gauld] Days without an accident

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  • Guessing they’ve never gone more than 31 days without an accident or they would have needed a bigger sign

  • Thou shalt not roast thy master

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  • Wait, what?

  • You surely won't regret it

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  • That guy with the mullet looks sharp

  • Microsoft points finger at the EU for not being able to lock down Windows

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  • Apparently it’s because CrowdStrike installed their device driver as one that must start when Windows starts.

    Explained here: https://youtu.be/wAzEJxOo1ts?feature=shared&t=675

    I’ve linked to the specific time where he explains that issue, but tbh the whole video is worth watching.

  • Microsoft points finger at the EU for not being able to lock down Windows

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  • The Expanse

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  • I’ve read all nine and I can’t say that I noticed any real differences between the two.

    Each chapter in the books is written from a specific character’s perspective. From what I understand, each of the characters was written consistently by one author or the other. So, for instance, all the Naomi chapters would be written by the same person. They may not have stuck 100% to that, but I think that’s how they tried to fit things together.

  • British cuisine is like...

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  • lol, definitely no lentils in that.

    It’s likely a version of mince and tatties, but with boiled potatoes instead of mash.