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simonrobb

260 karma · joined May 20, 2012

Engineer and founder (ex-Uber). Structural engineer in a previous life.

sajrobb [at] gmail dot com

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simonrobb··on Waymo One: The next step on our self-driving journey
Pareto Principle? https://en.wikipedia.org/wiki/Pareto_principle
simonrobb··on ReX.js – Your RegEx companion
> If you have a single CS bone in your body, you should be able to grok at least the basics of regex.

Sure, but I don't think the existence of this lib implies the author disputes that, and I can only imagine they're pretty familiar with regex themselves. I think they're trying to fill a legitimate need in frontend dev, which is: if you're only touching regex a few times a year, it's pretty intimidating, and not at all maintainable. SQL can also be difficult to grok if you don't write it often, and ORM interfaces make it easier.

Would the world be a better place if everybody knew regex perfectly? Yeah ok it would, but investing a bunch of time learning something you will only occasionally use is a poor investment IMO.

> If you don't, then go back to designing* I guess, and ask for a programmers' help

This seems to be needlessly condescending? You can be an excellent programmer (particularly in frontend) for years while avoiding regex. It's not a make-or-break thing.

simonrobb··on Cern scientist: 'Physics built by men – not by invitation'
Well no. You're assuming a lot about me. I've expressed an opinion on exactly one place which I think is wrong.

You're probably right Galileo didn't have a platform, but you're the one drawing that comparison, not me. Do you really think he has the same problem, in the age of the Internet? In another comment below I've suggested other, more respectful, platforms: "Blogs/journals/conferences not specifically for supporting women/editorials/radio shows/record a podcast. Write a manifesto for crying out loud."

simonrobb··on Cern scientist: 'Physics built by men – not by invitation'
Thank you, OED. Would you call a concession ticket a free ticket? Pretty sure one means a discount to account for other personal factors, and the other means... free.
simonrobb··on Cern scientist: 'Physics built by men – not by invitation'
Upsetting anyone? Probably not possible, and probably not desirable. There's always going to be people getting offended when you state a controversial opinion. But of course you can minimize the offense, and it doesn't take much imagination to think up a better option than a conference designed to support women. Blogs/journals/conferences not specifically for supporting women/editorials/radio shows/record a podcast. Write a manifesto for crying out loud.
simonrobb··on Cern scientist: 'Physics built by men – not by invitation'
I can't speak for the libertarians and how they respond. I think a libertarian blog is the perfect place for it, and I'd have happily engaged in a debate, just like I am here.

I was very outspoken in the wake of James Damore being fired from Google, because I think there was a reasonable narrative in there somewhere, even though some of the science was flawed. I still don't think firing the guy was the right response. To my mind his ideas were respectfully presented and weren't phrased in absolutes. There could have been a great conversation around gender in Google as a result.

But this is different to that. This is somebody writing off a large group's experience, supported by poor science, in an area he knows nothing about, at a conference for the express purpose of supporting women. I don't want to shut down conversation, but I sure want to condemn people who can't be respectful of others.

simonrobb··on Cern scientist: 'Physics built by men – not by invitation'
I think the selection of studies was somewhat myopic, and I thought his reasoning was flawed, so I'd change that.

But honestly I wouldn't have so much of a problem if he presented the same thing anywhere other than a conference for encouraging women into science. If I were any one of those women, I would have walked away discouraged and hurt.

simonrobb··on Cern scientist: 'Physics built by men – not by invitation'
Galileo maybe isn't the best example, since his reputation seems to (as I understand it) be massively overblown in an enduring myth.

But I think the question you're asking is: am I critical of him because it's fashionable today to push feminism with blinkers on? And would I still do so in 50 years, if today he sparked a mens' rights revolution?

Let's not assign this guy mythical status preemptively. There have always been loud points of view; some of them haven't held up with time, others have. We usually forget the ones that haven't, unless they managed to really hurt people along the way. To put it another way, just because you take a loud contrary position on a political or social issue, doesn't mean you're right.

I actually do applaud him for standing up for something, but my admiration only goes that far. You can present your point of view while trying to minimize the collateral damage. You can also be aware of your own fallibility.

If Galileo burst into Catholic prayer to proclaim the church was wrong and he was right, yeah, I'd call him a bit of a dick. What does he hope to achieve, by choosing the forum that is most disrespectful of others?

simonrobb··on Cern scientist: 'Physics built by men – not by invitation'
I take free pass to imply you don't have to do anything. Preferential treatment is more like - this person is good enough to do the job and do it well, and they have a background we want to support so that's an extra positive.

I was once passed over for a job, and I somewhat knew the female candidate who got it. We were equally qualified, and I may have been slightly more experienced. I think it's likely that was preferential treatment (I could be wrong, maybe they just liked her more, maybe it was arbitrary). I think that's awesome. I most definitely wouldn't call it a free pass.

simonrobb··on Cern scientist: 'Physics built by men – not by invitation'
Being a scientist doesn't preclude having empathy.

Presenting data and drawing conclusions is fine. You just don't have to be a dick about it.

simonrobb··on [dead]
I had the same experience after moving to the US for the first time. I'd never had a personal interaction with somebody of color, and all my views had been shaped by what I'd seen on American TV (typically not flattering, in the 80s/90s).
simonrobb··on [dead]
If you have a historical system of imbalance (e.g.: caste system), and today we decide we're going to get rid of it, do you think it's just going to fix itself and everybody is suddenly equal? Even though all the people in power are from the upper caste, and the lower castes are uneducated, and poor?

It's not "blantantly idiotic"! I often think the way affirmative action is implemented is flawed, but at least it takes into account the momentum of the problem and tries to do something about it. It takes a long-term view of how equality might be achieved by propelling those up who wouldn't make it otherwise, to disrupt the infinite loop. In the short term those who are used to privilege find it a little harder (boo-hoo, you've tasted a little a tiny slice of what the other side has had... for centuries). It's for the long-term achievement of what you ostensibly support.

simonrobb··on Cern scientist: 'Physics built by men – not by invitation'
Great response. It's uncomfortable doing an honest self-evaluation.
simonrobb··on Cern scientist: 'Physics built by men – not by invitation'
Definitely not as overtly prohibitive as in the past, but still we have workplaces/systems/hierarchies which aren't as inclusive for men as they are for women. e.g.: you won't find many women on the trading floor, but I'm pretty sure there are a lot of women out there who would enjoy making a shit ton of money in a high-risk environment. However the treatment of women there is notoriously bad. It's not the job women don't want, it's the toxic environment which goes along with it.
simonrobb··on Cern scientist: 'Physics built by men – not by invitation'
It's not the right forum to express this evidence/conclusions. It's insensitive, and entirely without empathy. People have good reason to be upset.
simonrobb··on Cern scientist: 'Physics built by men – not by invitation'
Let's just ignore whether this guy's arguments are valid or not for a second, why, why would you present them in a room full of young, presumably aspirational, predominately female scientists at a conference focussed on getting more women to science? You can question whether such a conference should exist, but this isn't the way to make your point. Particularly when bringing up studies suggesting women like working with people and men like working with things - all those women in the room seemingly don't fit into that reductionist rule, so it's irrelevant in the context at best, and flat out wrong at worst. He's not a crusader, he just seems like a bit of jerk.

> given free passes into the field based on gender

Free passes aren't given based on gender, though preferential treatment might be given as part of an affirmative action program. Personally I think that is absolutely necessary, in all of STEM, because I believe there is a structural imbalance in our society against women. I'm open to the idea there isn't, and there are immutable biological differences at play, but unless we do something meaningful to correct the societal factor we'll never know. But it's super easy to say there's no chance of that and we should treat everybody totally equal, when you're not the one with the disadvantage.

As to his arguments, so much of the evidence he points to can be shaped by the same societal forces he is trying to dismiss. "I made some simple checks and discovered that it wasn't, that it was becoming sexist against men and said so." Anybody who thinks they can unravel this in a evening on google is arrogant, and totally wrong.

> speaking some truth

Real scientists don't talk in terms of absolute truth, they deal in scientific consensus given the available evidence. Please consider being less dismissive, when almost 50% (and in some ways, 100%) of the world's population is affected by how we view and respond to gender.

simonrobb··on Glyphosate perturbs the gut microbiota of honey bees
> I’m sorry but it’s fundamentally irrational. Everything is chemicals. Chemophobia is by definition irrational.

You might disagree, but it's not irrational at all. To follow your argument, if everything is chemicals - is it rational to presume everything is safe? Of course not, there are plenty of dangerous things in the world. Of course the -phobia demarks a fear as irrational, but this isn't "chemophobia".

> ~~~It’s not.~~~ Glyphosate is a herbicide: if you spray it on plants, those plants die. That is in fact its purpose.

It's also worth noting that while it's a herbicide, of course it's only effective as a herbicide at a certain concentration. Consider that <agricultural conglomerate X> intends to spray the weeds right next to the lettuce, not the lettuce itself, so they can make $$$ from that still-alive lettuce at market. It's still going to be exposed to a small amount of herbicide, just not in a "lethal" dose. Is it absorbed into the lettuce/does it make it to the consumer? I don't know. If it did, would it be harmful at that dose? Probably not, but I don't know. Does it accumulate in the body over time, to an eventual harmful dose? Don't know. But those questions all demonstrate that it's not simply an irrational fear; there is a good number of questions to answer to go from "this could be unsafe" to "this is definitely safe".

I don't have any views on Glyphosate at all, I know next to nothing about it. Just objecting to your first two points.

simonrobb··on Facebook open-sources LogDevice, a distributed storage for sequential data
OKLog, Humio, and Splunk are all worth checking out.
simonrobb··on Beleaguered Didi Is Said to Lose $585M in Just Six Months
> We can stop calling it car sharing.

I was referring to Uber/Lyft pools in that paragraph: "Share a car to work with some of your colleagues, who happen to live near you, sure." Agreed, ride sharing is a much misused term.

I can't give an informed opinion on just how profitable driving for Uber/Lyft is right now. Everything I've read on the subject has been (potentially) biased, devoid of real data, or since shown to be incorrect. I'd love to read studies on this if there are some available. I do think the best solution is to make as much data on profitability available to drivers, so the market can correct itself if necessary, like you suggest.

However I don't think the ride hailing companies are blind to the economics of their markets. If there is a problem with the economics, that's an existential risk and they're not going to be sitting on their hands. If we're comparing ride-hailing with traditional car services, it's the ride-hailing side which have a whole lot of knobs they can twiddle to make the market work, and they're adding more all the time (e.g.: Uber/Lyft Pool can go a long way toward mitigating driver "opex" - minimizing those empty seats, like any efficient transport operator.)

I just don't think the efficiency of centralized maintenance is really that big a deal. Even if we ignore all the other factors at play, if that's the make-or-break feature Uber could easily provide centralized mechanical support for their fleet. They already have driver centers in each city they operate in.

simonrobb··on Beleaguered Didi Is Said to Lose $585M in Just Six Months
TIL. I'm an import here so was making some assumptions. I stand corrected!
simonrobb··on Beleaguered Didi Is Said to Lose $585M in Just Six Months
> and they'd have a car there in 5-10 minutes max

The introduction of low-cost options for Uber/Lyft were arguably as important a development as their original ride-hailing app ideas. Once the fleet was no longer constrained to professional drivers, and anybody with a spare hour or two (and a car) could go online, the size of the fleet exploded. That meant the likelihood of having a car near you - no matter where you are in a city - dramatically increased. Sure, call your local car service from home when you're heading to JFK and he'll be there in 10. How about when you're in the Village at 1am? How about Red Hook? Not to mention this allowed the service to be provided in cities all over the world which didn't previously have a car service at all.

> 10,000 highly-paid developers

Uber probably services more than 10,000x the number of rides than your car service did. I suppose you could try employing 10,000 "ladies with a phone" to handle that volume - but of course human dispatch quickly becomes unable to handle those kinds of volumes. Sorry, those developers are necessary for scale.

> and providing a marginally better level of service

Car-sharing with strangers was impossible before Uber/Lyft operated at scale. Share a car to work with some of your colleagues, who happen to live near you, sure. But to car pool anywhere at any time requires a huge fleet, and the technology to match riders who are taking the same route. That is an very difficult problem to solve, and yes it takes capable engineers. That car pooling allows fares which are probably around a third of what your car service charges. More improvements are on the way which should see short-medium trips of a comparable cost to public transport.

Not to mention providing this service in under-served and otherwise unprofitable areas, to minorities, at all times of day, all across the world. Plus of course a consistent name and brand, by far the biggest value-add ;)

Now integrate with other modes of transport - public transport, bikes, and yep even scooters. These companies are positioned to shape entire cities' transit systems (they already have, for better or for worse). They're not the same as your small car service, and they're not over-engineered. They're certainly not setting out every day worried about justifying their Silicon Valley existence.

simonrobb··on Fusion.js: A Plugin-Based Universal Web Framework
Having used Fusion a bit now (I'm an engineer at Uber, but not on the Web Platform team that produced Fusion), I'm really enjoying the DI system. Agreed other DI mechanisms (e.g.: Angular) are too magical; Fusion uses a token system which is very easy to reason about.
simonrobb··on Fusion.js: A Plugin-Based Universal Web Framework
Can you expand on why you think Fusion locks you in?

Without a more detailed argument this sounds like you're just plugging your product.

simonrobb··on The Obsessive Search for the Tasmanian Tiger
Should be noted this is footage of the last known Thylacine, in a Tasmanian zoo.
simonrobb··on The Obsessive Search for the Tasmanian Tiger
>Tasmania, which is sometimes said to hang beneath Australia like a green jewel

Tasmanian here - I have never heard this either, and have most definitely never said it.

simonrobb··on Concorde ‘B’
Incidentally Uber (who are developing electric air taxis with Embraer, et al) are live streaming their annual summit on the topic starting tomorrow. https://www.uber.com/info/elevate/summit/
simonrobb··on Ask HN: Side project you're working on?
Developing low-cost wireless soil moisture sensors for agriculture. It's old technology but the proven benefit is huge, and adoption has been really poor (mostly) because of the cost.
simonrobb··on Tech takes over: New York is the sector's second city
I moved from Australia to NYC, the one trick I worked out was changing my location on LinkedIn prior to the move. You'll show up on all the recruiters radars then (if that's what you want).

I'd be happy to talk with you, my company is always keen to speak with talented engineers.

simonrobb··on U.S. judge says Uber withheld evidence, delays Waymo trial
Only for official RFIs though right? Not all email communication. (speaking from my experience as a structural engineer in Australia, things may be different here)
simonrobb··on SoftBank said to be trying to buy a big stake in Uber at a discount
> It is absurd to claim that liquidity in Uber shares would result in a 30% discount.

I'm not sure that it is (as aaavl2821 has commented down the thread, "The liquidity discount that private equity investors use is typically 20-30%"), but more to the point this price is either accepted or rejected by Uber shareholders, not Uber's board. It's the shareholders who will decide if they will take that discount for the sake of liquidity, not some mystical market force you're alluding to. Given many of them are employees who may well just want to get their returns and buy a family home, I think we'll see a lot of them taking the offer up. They're just offloading their risk, and gaining liquidity.

> A far better explanation is that preferred has rights that add most of that value.

I did in fact note that in my original comment. But this only explains why SoftBank is willing to pay different prices for two different classes of shares. It doesn't mean Uber is suddenly worth $21B less because SoftBank was able to strike the deal, which is what I'm arguing against.

> You are essentially claiming that you are smarter and better informed than the participants in a large financial transaction

No, I'm not. I'm claiming that something a media outlet published is a distortion of the deal. They were not participating in the transaction.

We'll have a better discussion if you can leave the ad hominems out in the future.

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