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Clojure data structures are immutable [1], core to its principles.

1 https://clojure.org/reference/data_structures


Ah okay that’s cool then. I thought you were calling out some low level implementation detail of lisp I had overlooked. I’m trying to build a lisp as the intermediate of my new toy programming language. So I wanna get that right.


No it's a Clojure thing. Other lisps may vary.


Wider observation of the possibility for emergent behaviour vs narrow assumption of declarative state programming.


Business side manages financial transactions. Sales, accounts receivable, accounts payable...

Operations side performs whatever services the business side has committed to.


Near the end of your Siggraph 2019 talk (excellent, thanks), an audience member mentions an IEEE Spectrum article "Geometric Algebra for Electrical and Electronic Engineers". What is the author's surname that you mention?

Peter Yolks? Jolts? Holt? Oates?

For me, multiple searches have yielded no results for a similar author name so far.

Specifically, there does not appear to be any such article on IEEE Spectrum [1], but there is one on Proceedings of the IEEE [2] whose listed authors do not include anyone named Peter.

Curious because you go on to state that his work is readily available. That caught my attention, so I became interesting in finding out more.

[1] https://spectrum.ieee.org/searchContent?query=Geometric+Alge...

[2] https://proceedingsoftheieee.ieee.org/most-downloaded/geomet...


No expert, but just happened to watch a video this morning.

According to a talk by Paul Stamets [1], common viruses transmitted from mites to bees may be managed better by adding mushroom derivatives to sugar water feed.

[1] Paul Stamets: Mycology and Mushrooms as Medicines https://m.youtube.com/watch?v=1Q0un2GPsSQ


As a Roblox programmer (Builder’s Club) scripting a game, the draw of addressing this huge user base by way of simply coding Lua scripts to release a product that invites In App Purchase is downright tempting!

Then you discover the apparently wide spread client side hacking (speed, teleport, aim bots... you name it) and content theft (models, geometry, Localscripts) and pervasive scam attempts so frequently reported. But that’s the internet, and the cost of doing business, right?

After some success (proof of concept stage) building an unreleased game, I started to notice pitfalls and inconsistencies in the developer docs, including lack of documentation for methods and properties specifically out as recommended or best practice approaches.

Chunks of the docs would suddenly disappear for days or weeks with no notice and no explanation and may or may not reappear after some time. Didn’t see any change logs that I could find.

And then one day this summer I could not access the developer docs site at all, from any of my devices on different ISP connections. After proding around, I realized this was only occurring on Safari (Mac and iOS). Too many redirects (for Tracking)! Apparently Safari had gained additional privacy checking after an update.

Got me thinking, if it’s the case that Apple effectively doesn’t trust the techniques used by Roblox to add tracking to their developer documentation site, is this effort something I want to continue pursuing?

Which segues to the question:

Given the active user base and gross cash flow of Roblox, how do you now frame the new ARKit, RealityKit, Composer, and SwiftUI announcements from WWDC?


Too many redirects is a stopgap measure to avoid circular references. There is nothing positive about this practice, as you actually visit all the "tracking" URLs up until the max-redirects deep. Browser doesn't know there's that many redirects until it follows them.


> Given the active user base and gross cash flow of Roblox, how do you now frame the new ARKit, RealityKit, Composer, and SwiftUI announcements from WWDC?

I'm not sure what the question is, the two are hardly related. I guess you can use both to create games, but the thing is, you wouldn't have the network to go with it. I mean you could create a video but unless you upload it to youtube it might as well not exist. Or you could create a mobile game but unless it's in the app store (or featured / in the top x) it might as well not exist.

Roblox at least gives your content a chance of being discovered.


I don’t think your odds of being discovered on Roblox are that much higher than on the App Store. Roblox is full of a lot of content (most junky) that you’d have to swim through to get to the front page.


AH-1Z Viper, a successor to the SuperCobra, which succeeded the original Cobra from the late 60's.

Apache is very different machine.


That proves my point even more if the Cobra is even older. I imagine it would be extremely expensive to add an ejection system to a helicopter that wasn’t initially designed for it.


Assumes grocer’s primary customer is consumers. What does the product manufacturer or the distributor want? Not the same as what the consumer wants. Who pays what to the grocer? Ever seen 3-5 people staring at shelf space and taking notes? Guess what they are buying.


It is ... missing more than just that.



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