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I find it amusing that supposedly the printf-family of functions' format strings are bad and streaming operators should be used yet the std:: time format functions seem to use format strings.
"They have a consciousness, they have a life, they have a soul! Damn you! Let the rabbits wear glasses! Save our brothers! Can I get an amen?"
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Rick York wrote: I find it amusing that supposedly the printf-family of functions' format strings are bad and streaming operators should be used
In fact, while I like the idea behind stream classes. I often find the C format strings more useful.
"In testa che avete, Signor di Ceprano?"
-- Rigoletto
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I agree. The primary argument I have read against them is there is no type checking and that is no longer true. VC++ gives warnings on types that don't match the format specifier. Plus, there's thing we refer to as testing. It can catch all of those errors. In short, I don't buy that argument at all. I have yet to see a compelling argument that sways me away from using printf and I have read them for at least twenty years.
"They have a consciousness, they have a life, they have a soul! Damn you! Let the rabbits wear glasses! Save our brothers! Can I get an amen?"
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It requires the format string, which makes it useless. The format is standard, I don't have to parse it and figure out which variation of the format is used. If I wished to do so I would have used my old friend sscanf and an ad hoc function.
Why should I write it on my own for a format that is an ISO standard, anyway?
GCS d--(d+) s-/++ a C++++ U+++ P- L+@ E-- W++ N+ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t+ 5? X R+++ tv-- b+(+++) DI+++ D++ G e++ h--- r+++ y+++* Weapons extension: ma- k++ F+2 X
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%T equivalent to "%H:%M:%S" (the ISO 8601 time format)
%F equivalent to "%Y-%m-%d" (the ISO 8601 date format)
Format more clearly stated under strftime but also applies to chrono::parse
strftime - cppreference.com[^]
"If we don't change direction, we'll end up where we're going"
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ISO8601 strings also have the time zone, and what irks me is that it's a standard, why should anyone need to specify the format when it is, in fact, standard?
Besides, this
Returns an object manip of unspecified type such that, given a std::basic_istream<CharT, Traits> object is, the expression is >> manip calls from_stream (unqualified, to enable argument-dependent lookup) as follows:
1) from_stream(is, fmt.c_str(), tp)
2) from_stream(is, fmt.c_str(), tp, std::addressof(abbrev))
3) from_stream(is, fmt.c_str(), tp,
static_cast<std::basic_string<CharT, Traits, Alloc>*>(nullptr), &offset)
4) from_stream(is, fmt.c_str(), tp, std::addressof(abbrev), &offset).
The expression is >> manip is an lvalue of type std::basic_istream<CharT, Traits> with the value is.
These overloads only participate in overload resolution if the corresponding from_stream expression is well-formed.
makes no sense.
What there should exist?
time_t std::something::parseISO8601(std::string date);
Easy. Or the same with tm structure. Not a semiobscure infrastructure to build my own date format and parser, considering that it is an ISO standard.
So much talking about adding gazillions of functionalities to C++ (because it already has a simple syntax) to ncrease code reusability and then this.
GCS d--(d+) s-/++ a C++++ U+++ P- L+@ E-- W++ N+ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t+ 5? X R+++ tv-- b+(+++) DI+++ D++ G e++ h--- r+++ y+++* Weapons extension: ma- k++ F+2 X
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time_t is 64-bit when built for/on 64-bit Linux.
printf("sizeof(time_t): %d", sizeof(time_t));
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Which makes cross platform development a bit finicky as you're not sure which time_t it will use. On Windows you can force the use of _time64_t even on 32 bit (as long as youm have at least WinXP on the target IIRC) and you're sure of the behavior.
GCS d--(d+) s-/++ a C++++ U+++ P- L+@ E-- W++ N+ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t+ 5? X R+++ tv-- b+(+++) DI+++ D++ G e++ h--- r+++ y+++* Weapons extension: ma- k++ F+2 X
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Hope this link helps. __time64_t has been available for quite some time in the GCC world.
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Bonus rant: GNU C library sucks. No __time64_t to force the use of 64 bit, no sscanf_s which should be standard... damn ungulates. So, your software is quite optimistic about the pandemic.
"In testa che avete, Signor di Ceprano?"
-- Rigoletto
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Pandemic will kill humans, my software will run on the machines that will take our place.
GCS d--(d+) s-/++ a C++++ U+++ P- L+@ E-- W++ N+ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t+ 5? X R+++ tv-- b+(+++) DI+++ D++ G e++ h--- r+++ y+++* Weapons extension: ma- k++ F+2 X
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I shop and buy something on Amazon (in particular) and if I look to buy it again it's always more expensive.
OK -prices go up - but I've seen this literally "overnight" and the item I check is from a link from the invoice so it's the same source.
Is this another version of using my browsing/purchasing information on their sight to make some extra money?
Anyway, am I just rather unlucky in what I purchase or is this all-too-common?
| Ravings en masse^ |
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| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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I have chalked most of the price hikes I see on Amazon to COVID.
A particular brand of salsa that I like and have bought in the past at $4 a jar are now being sold at almost $9 a jar. Same company. Same salsa. Same jar.
WTF is that? 
Edit/correction: seems the prices are starting to come down since I last looked a few months ago. $5-6 now per jar, give or take. Still too expensive in my opinion to what it used to be.
Arriba Hot Salsa[^]
modified 17-Mar-21 10:50am.
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Well, if it's supply and demand, it would be called "capitalism" - however it's not, since I've seen prices that don't have much of a link to supply/demand take off. Price gouging. But, I mean, salsa? Mrs. Wife just noted that one of the local bagel bakeries just jacked up it's price massively to $1.50/ea. Personally, I'd let them keep 'em until they rot. Will the others follow with the price hike (take-it-or-leave-it) or will business decline enough to punish them or, as is all to common, take the other "CP" route: Complain and Pay.
In the context of a particular brand you like they might think "they have you!" but since they're competing with a ton of other salsa brands, I don't see how they get away with it.
Some (non-online) items I but are suffering a bit from COVID, but we're talking about maybe 25% more the lowest "on-sale" price. It's all a magic mystery.
| Ravings en masse^ |
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| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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I recently heard that that's exactly what some vendors do.
If you search for something, you might "buy it on a whim if the price is low enough", so they give an enticing price.
But if you didn't buy it, and come back to "look again", now you're "serious" and you'll likely be willing to pay more.
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In this case, it's interesting that there are 3 sizes and the only one that went up happens to be the one I bought. Sure - just a coincidence.
| Ravings en masse^ |
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| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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I bought some SSDs from eBuyer a couple of weeks ago, and they are now 17% cheaper. But I know if I had waited the price would almost certainly have gone up.
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Tech is one of those things that (almost) always keeps getting cheaper over-all and for a specific item as it becomes less current (except extreme legacy needs - buying antiques).
The one reverse in the spike, for a short while, was from the tariffs on China which had their obvious effect. There, too, it eventually all gets absorbed. No one want to be caught holding last week's stuff.
| Ravings en masse^ |
|---|
| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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I bought a woodworking vise from Amazon and asked my son if he wanted one for xmas present and he said yes.
The next day I went back to buy and the price had exactly doubled, from like $75 to $150. WTF...24 hrs?
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Not really, I saw fluctuations in both directions. The second time I bought Starbucks coffee it was more expensive than the first while the third time it was way cheaper.
GCS d--(d+) s-/++ a C++++ U+++ P- L+@ E-- W++ N+ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t+ 5? X R+++ tv-- b+(+++) DI+++ D++ G e++ h--- r+++ y+++* Weapons extension: ma- k++ F+2 X
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I would expect in this instance it is more a case that "the item was bought" rather then anything to do with it being bought by you specifically.
That is... the more an item sells = the more it's in demand = the more the vendor should charge.
Rather than... oh look, this mug is back again, let's charge him more this time.
Now if you had only browsed it yesterday (without buying) and it had gone up today, that would be more worrying - but still not something that couldn't be put down to coincidence.
Personally, I have never seen it myself, but I very very rarely buy something and then go back for more the day after, so I wouldn't notice. I have heard it mentioned somewhere before though, maybe even on CP (I can't recall exactly).
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musefan wrote: That is... the more an item sells = the more it's in demand = the more the vendor should charge.
The more the vendor could charge, not necessarily should charge.
But in this case, it was kitchen dish-washing gloves (also good when doing electrical work, caulking the shower, etc.). I really don't think that between yesterday and today they had a big run on rubber gloves. It's far beyond that. I just look at things I bought just this year and it's typically the same. Maybe, following your idea, if the vendor even sells one via Amazon they send in a price increase.
Interestingly, I'm not a big Amazon shopper. My history (orders/year) is at a high for 2020 at ten, but going back years, mainly eight or nine, the low was seven. Essentially no COVID bonus from me. Logically, they need to still attract my interest.
| Ravings en masse^ |
|---|
| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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It could be an automated pricing algorithm that Vendors configure via settings? who knows, versus, a vendor manually up-charging for the same recently purchased product.
which, if this is true, then I would be very upset that Amazon would allow vendors to price gouge "repeat" customers....or customers period.
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Slacker007 wrote: which, if this is true, then I would be very upset that Amazon would allow vendors to price gouge "repeat" customers....or customers period.
Actually, with the type of shyte and fake items and fraudulent description now covering Amazon, I'm sure they'd not blink an eye - except, perhaps, for a wink if they get to keep a percentage of the selling prices on items.
I, fortunately, didn't ever buy into Amazon Prime and thus invest in spending money with them. I only managed 9 or 10 orders/year - always with free shipping (not enough spent then I don't order). Even, however, if I spent on the shipping I'd never make back my hundred bucks.
| Ravings en masse^ |
|---|
| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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I have seen this, prior to the pandemic, with some odd items. I get a particular calendar every year, usually as a gift, and one year I didn't so I went to Amazon in February to look for it and a normally twenty-dollar item was selling for over 900. I couldn't believe it so I went without the calendar that year. FWIW, that was in 2018.
"They have a consciousness, they have a life, they have a soul! Damn you! Let the rabbits wear glasses! Save our brothers! Can I get an amen?"
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