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Formatting of Expressions. (Was: Re: FD 2)

by Ralph Corderoy

Hi Dave, COFF'd. > > I'll never do if (a==b&&c==d), always if ((a==b)&&(c==d)). > > Indeed; I *always* use parentheses even if they are not necessary (for > my benefit, at least). I find unnecessary parenthesis annoying and clutter which obscures reading. If parenthesis are used only when overriding the default precedence then this beneficially draws attention to the exception. I doubt mandatory parenthesis are used in maths formulas by those that use them in expression. Whitespace is beneficial in both maths formulas and expressions. The squashed expression above will often be spaced more. if (a==b && c==d) if (a == b && c == d) Go's source formatter will vary which operators get spaces to reflect precedence, e.g. https://go.dev/play/p/TU95Oz57GuF shows ‘4*3’ differs. fmt.Println(4 * 3) fmt.Println(5 ^ 4*3) fmt.Println(5 ^ 4*3 + 2/1.9) -- Cheers, Ralph.

1 year, 10 months

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ChatGPT and Mark V. Shaney

by Dave Horsfall

Has anyone hooked them up? :-) -- Dave

1 year, 10 months

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Re: Anyone still using USENET?

by Nevin Liber

[moved to COFF] On Sat, Jan 28, 2023 at 4:16 AM Andy Kosela <akosela(a)andykosela.com> wrote: > Great initiative and idea! While I am personally not interested in reading > USENET that much nowadays, the concept of providing free, public access to > classic Internet services (public USENET, FTP, IRC, finger, etc.) gets all > my praise. What happened to free, public services these days? First off, what is stopping you from providing free, public access to those services? I don't know where you are, but I have orders of magnitude more access to freely available content and services than I ever did in the heyday of Usenet, etc. And for most of it, one doesn't have to be highly technical to use it. > Everything appears to to be subscriber pay-as-you-go based. The > commercialization killed the free spirit of Internet we all loved in the > 90s. > "Free" was never really true, as it required massive subsidies of equipment, power, bandwidth and employee time, usually w/o the direct knowledge or consent of the entities paying for it. It reminds me of the lemonade stands I'd occasionally run as a kid, which were "profitable" to me because mom and dad, with their knowledge and consent, let me pretend that the costs were $0. -- Nevin ":-)" Liber <mailto:nevin@eviloverlord.com> +1-847-691-1404

1 year, 10 months

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Re: reading historic magnetic tapes

by Charles H Sauer (he/him)

This seems COFF, not TUHS, and mostly not digital... I have many 4mm DAT cartridges from 20-30 years ago. Every now and then I will access one. So far I've yet to see evidence of the media degrading. On 1/28/2023 4:12 AM, Steve Simon wrote: > baking old, badly stored magnetic tapes prior to reading them is a common practice. For the last year+ I have been digitizing selected audio tapes made in the 70s at AWHQ (https://en.wikipedia.org/wiki/Armadillo_World_Headquarters) The ones I've been working with are 1/4" on 10.5" reels. A printed inventory I was given says "bake" next to almost all of the items, but so far, after processing roughly 40 reels, I've yet to find one that seemed to need "baking" (actually, "baking" is a bit overstated, in that best practice is to raise temperature to roughly 150F -- https://www.radioworld.com/industry/baking-magnetic-recording-tape) For now, I'm not able to share those AWHQ recordings, but I can share other recordings I made in the 60s and 70s at https://technologists.com/60sN70s/. In all those reels, many of which are cheap, unbranded tape, I didn't find any that seemed to me to need baking. Charlie -- voice: +1.512.784.7526 e-mail: sauer(a)technologists.com fax: +1.512.346.5240 Web: https://technologists.com/sauer/ Facebook/Google/LinkedIn/Twitter: CharlesHSauer

1 year, 10 months

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Re: [TUHS] Re: reading historic magnetic tapes

by Michael Kjörling

On 28 Jan 2023 11:29 -0800, from frew(a)ucsb.edu (James Frew): > As I was leaving the lab late one evening during this mini-crisis, I had to > walk around a custodian who was busy giving the linoleum floor in the > hallway its annual deep cleaning / polishing. This involved a dingus with a > large (~18" diameter) horizontal buffing wheel, atop which sat an enormous > (like, a cylinder about as big around as a soccer ball) electric motor, > sparking commutator clearly visible through the vents in the metal housing. This is probably more COFF than TUHS, but I recall a story from almost certainly much later where someone (I think it was a secretary; for now, let's pretend it was) had been told to change backup tapes daily and set the freshly taken backup aside for safekeeping. Then one day the storage failed and the backups were needed, only it turned out when trying to restore the backups that _every_ _single_ _tape_ was blank. Nobody, least of all the secretary, could explain how that could have happened, and eventually, the secretary was asked to demonstrate exactly what had been done every day. Turned out that while getting the replacement tape, the secretary put the freshly taken backup tape on a UPS, which apparently generated a strong magnetic field, before setting that tape aside. So the freshly taken backup tape was dutifully well and thoroughly erased. Nobody had mentioned the little detail of not putting the tape near the UPS. Oops. -- Michael Kjörling 🏡 https://michael.kjorling.se “Remember when, on the Internet, nobody cared that you were a dog?”

1 year, 10 months

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Re: [TUHS] Re: [off-topic] Anyone still using USENET?

by Stuff Received

On 2023-01-27 14:23, Stuff Received wrote: > On 2023-01-27 12:42, Henry Mensch wrote (in part): >> I'd like to find solid Android and Windows clients so I could once >> again use USENET. > > I read USENET (at Newsdemon -- USD3 monthly) with Firefox (on MacOS) but > presumably will also work on Windows. Oops -- Thunderbird, not Firefox. > > N. > > (We seem to have strayed into COFF territory...)

1 year, 11 months

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Re: [TUHS] Fwd: How did Bell Labs start to work on Project MAC?

by jnc＠mercury.lcs.mit.edu

> I have yet to look at the oral history things from Corby, etc which may > answer this in passing. This page: https://multicians.org/project-mac.html links to oral history transcripts from Fano, Corby and Dennis. Only Corby: https://conservancy.umn.edu/handle/11299/107230 http://archive.computerhistory.org/resources/access/text/2013/05/102658041-… was involved when Bell Labs came on board; he says: "Also Bell Labs was interested in acquiring a new computer system. They were quite intrigued and sympathetic to the notions of what we were doing. Ed David down there was a key figure and an old friend of Fano. They decided to become partners (pg. 16, CHM interview) "Simultaneously, Bell Labs had been looking for a new computer acquisition for their laboratories, and they had been scouting out GE. There was some synergism: because they knew we were interested they got interested. I think they first began to look independently of us. But they saw the possibility of our developing a new operating system together." (pg. 43, CBI interview) So it sounds like it was kind of a mutual thing, aided by the connection between Fano and David (who left Bell after Bell bailed on multics). Noel

1 year, 11 months

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Re: [TUHS] Fwd: How did Bell Labs start to work on Project MAC?

by jnc＠mercury.lcs.mit.edu

> From: Dan Cross > From Acceptable Name <metta.crawler(a)gmail.com>: Gmail has decided this machine is a source of spam, and is rejecting all email from it, and I have yet to sort out what's going on, so someone might want to forward anything I turn up to this person. >> Did Bell Labs approach MIT or was it the other way around? I looked around the Multics site, but all I could find is this: "Bell Laboratories (BTL) joined the Multics software development effort in November of 1964" https://multicians.org/history.html I did look through IEEE Annals of the History of Computing, vol. 14, no. 2, listed there, but it's mostly about the roots of CTSS. It does have a footnote referring to Doug, about the timing, but no detail of how Bell Labs got involved. I have yet to look at the oral history things from Corby, etc which may answer this in passing. I'll ask Jerry Saltzer if he remembers; he's about the only person left from MIT who was around at that point. >> Did participating in Project MAC come from researchers requesting >> management at Bell Labs/MIT At MIT, the 'managers' and the researchers were the same people, pretty much. If you read the panel transcript in V14N2, Fano was the closest thing to a manager (although he was really a professor) there was at MIT, and he talks about not wanting to be involved in managing the thing! Noel

1 year, 11 months

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Fwd: How did Bell Labs start to work on Project MAC?

by Dan Cross

[Bcc: to TUHS as it's not strictly Unix related, but relevant to the pre-history] This came from USENET, specifically, alt.os.multics. Since it's unlikely anyone in a position to answer is going to see it there, I'm reposting here: From Acceptable Name <metta.crawler(a)gmail.com>: >Did Bell Labs approach MIT or was it the other way around? >Did participating in Project MAC come from researchers requesting >management at Bell Labs/MIT or did management make the >decision due to dealing with other managers in each of the two >organizations? Did it grow out of an informal arrangement into >a format one?" These are interesting questions. Perhaps Doug may be in the know? - Dan C.

1 year, 11 months

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Re: [TUHS] The era of general purpose computing (Re: AIX moved into maintainance mode (COFFed)

by David Arnold

(Move to COFF) > On 22 Jan 2023, at 05:43, Luther Johnson <luther(a)makerlisp.com> wrote: > > Yes, I know, but some of that SW development is being automated ... I'm not saying it will totally go away, but the numbers will become smaller, and the number of people who know how to do it will become smaller, and the quality will continue to deteriorate. The number of people who can detect quality problems before the failures they cause, will also get smaller. Not extinct, but endangered, and we are all endangered by the quality problems. Is it possible that this concern mirrors that of skilled programmers seeing the introduction of high-level languages? I’ve played with ChatGPT, and the first 10 minutes were a bit confronting. But the remainder of the hour or so I played overcame my initial concerns. It’s amazing what can be done, especially with Javascript or Python, when you ask for something that’s fairly simple to define, and in a common application area. You can get reasonable code, refine it, ask for an altered approach, etc. It’s probably quicker than writing it yourself, especially if you’re not intimately familiar with the library being used (or even the language). But … it pretty quickly becomes clear that there’s no semantic understanding of what’s being done behind it. And unless you specify what you want in pretty minute detail, the output is unlikely to be what you want. And, as always, going from a roughed-out implementation of the core functionality to a production-ready program is a lot of work. In the end, it’s like having an intern with a bit of experience, Stack Overflow, and a decent aptitude driving the keyboard: you still have to break down the spec into small, detailed chunks, and while sometimes they come back with the right thing, more often, you need to walk through it line by line to correct the little mistakes. I’m looking forward to seeing a generative model combined with static analysis, incremental compilation, unit test output: I think it will be possible for a good programmer to multiply their productivity by a few times (maybe even 10x, but I don’t see 100x). There’ll still be times when it’s simpler to just write the code yourself, rather than trying to rephrase the request. All of which makes me think of the assembly language to high-level language transition ... d

1 year, 11 months

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