About World Tour 2019: Some explanations
[JPR]
Hi Guys,
Thanks! And thanks again! You are really interested, and you don't trust
something without testing!
As Russian say: Доверяй, но проверяй. Trust, but verify. So you have been a lot
to try my little test, and I've received a pack of mails like:
Dear Uncle JPR,
i don’t know what version you are using, but i have tested it with 4D v17 and
R4 under Mac 64 bit and both lines have the same speed.
Maybe there are some missing information!?
Cagey Nephew.
If fact, you have highlighted the real problem, which is: In most of the cases,
it doesn't make any measurable difference. But in some cases, it does impact a
lot. I got a method which took 4.5 seconds to run, and I wondered why. So I
spent 2 days to track the guilty line, and by changing from
$params:=New object("entity";$entity;"object";Form.xObject)
to
$params:=New object("toto";Form.xObject;"entity";$entity)
the time went down to 300ms.
The context is a bit too complex to explain here, but I will show you, and
explain it in detail, during the training. It belongs to the vast class of
things which exist in every development environment, which are not explained in
books, but which roots can be explained (and, I hope, understood).
My very best,
JPR
To study and not think is a waste. To think and not study is dangerous.
(Confucius)
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Re: About World Tour 2019: Some answers (JPR)
On Feb 15, 2019, at 2:00 PM, 4d_tech-requ...@lists.4d.com wrote: > [JPR] > Hi Guys, > > As usual, I've again received a lot of mails, from USA and the rest of the > World, asking me if it's important to attend the WT2019, so once again, I've > decided to do a global answer. All of the questions end with the same > subliminal question: Does it worth it? Will we learn something valuable in > the Training Day? > … > I've spent a great lot of time to work with ORDA, to analyse, to measure, to > discover, to make mistakes, to correct these mistakes and make mistakes > again, in order to find the easiest possible path in the programming jungle. > My purpose is to share all this experience with you. I am definitely attending the Chicago 4D World Tour. I’ve attended all the 4D World Tours that have been offered and attended every JPR presentation. I’ve been to every 4D Summit since 1991 except for one — I had a broken leg and could not travel. Why do I attend? Because I want as much info as possible about how 4D works and as many low level details as I can get my hands on. Why? Because that’s how you become a “4D expert”. You really can’t become or call yourself a “4D expert” by simply saying “I’ve been using 4D for over years and I’ve written hundreds of thousands of lines of code.” There is a lot you still don’t know. There is a lot that I still do not know. And with ORDA the area of what I don’t know about 4D has grown tremendously. Remember, JPR is one of the few people in the world that has Laurent Ribardière's and Laurent Esnault’s email address and can send a message and get a reply. If he has a question about how 4D works at a low level, he can get an answer. From the real 4D experts! That kind of access leads to an unprecedented understanding of how 4D works. I want to know what JPR knows about 4D because it helps me to me be able to deliver better 4D solutions to my clients. You are not wasting time at 4D World Tour events, you are investing your time to learn more that will result in you saving time in the future. Tim * Tim Nevels Innovative Solutions 785-749-3444 timnev...@mac.com * ** 4D Internet Users Group (4D iNUG) Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:4d_tech-unsubscr...@lists.4d.com **
Re: V17 R - Mojave compatibility
Mitch, I've been using 17R3 and recently R4 with Mojave with no issues. I'm not doing production or using any fancy plugins with it but for general development it's been fine. On Fri, Feb 15, 2019 at 10:58 AM Mitchell Shiller via 4D_Tech < 4d_tech@lists.4d.com> wrote: > Hi, > > I know that 17.1 is Mojave compatible. > I am using 17R3. (I need some 4D WP features). > Question: will there be an 17 R release that will be Mojave compatible or > will I have to wait for v18? > > Thanks > > Mitch > > Sent from my iPhone > ** > 4D Internet Users Group (4D iNUG) > Archive: http://lists.4d.com/archives.html > Options: https://lists.4d.com/mailman/options/4d_tech > Unsub: mailto:4d_tech-unsubscr...@lists.4d.com > ** -- Kirk Brooks San Francisco, CA === What can be said, can be said clearly, and what you can’t say, you should shut up about *Wittgenstein and the Computer * ** 4D Internet Users Group (4D iNUG) Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:4d_tech-unsubscr...@lists.4d.com **
V17 R - Mojave compatibility
Hi, I know that 17.1 is Mojave compatible. I am using 17R3. (I need some 4D WP features). Question: will there be an 17 R release that will be Mojave compatible or will I have to wait for v18? Thanks Mitch Sent from my iPhone ** 4D Internet Users Group (4D iNUG) Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:4d_tech-unsubscr...@lists.4d.com **
change in behavior v 15 to v 16 ?
In v 15 if you have a the following line of code (with all variables typed) $DocRef:=create document(“”;”TEXT”) you could paste into the finder window In v 16 with exactly the same commands you can not paste into the finder window. Is this expected behavior or not The same behavior is exhibited in the request window Regards Chuck Chuck Miller Voice: (617) 739-0306 Informed Solutions, Inc. Fax: (617) 232-1064 mailto:cjmillerinformed-solutions.com Brookline, MA 02446 USA Registered 4D Developer Providers of 4D and Sybase connectivity http://www.informed-solutions.com This message and any attached documents contain information which may be confidential, subject to privilege or exempt from disclosure under applicable law. These materials are intended only for the use of the intended recipient. If you are not the intended recipient of this transmission, you are hereby notified that any distribution, disclosure, printing, copying, storage, modification or the taking of any action in reliance upon this transmission is strictly prohibited. Delivery of this message to any person other than the intended recipient shall not compromise or waive such confidentiality, privilege or exemption from disclosure as to this communication. ** 4D Internet Users Group (4D iNUG) Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:4d_tech-unsubscr...@lists.4d.com **
About World Tour 2019: Some answers
[JPR]
Hi Guys,
As usual, I've again received a lot of mails, from USA and the rest of the
World, asking me if it's important to attend the WT2019, so once again, I've
decided to do a global answer. All of the questions end with the same
subliminal question: Does it worth it? Will we learn something valuable in the
Training Day?
In fact, I think so ;-) But honestly, it depends. It depends on how valuable
you think your time is, it depends on how confident you are in your
capabilities to discover rapidly by yourself the Best Coding, including bells
and whistles, about ORDA. Let's do a little test:
- Which one of these 2 lines will be faster to execute?
1/ $params:=New object("entity";$entity;"object";Form.xObject)
2/ $params:=New object("toto";Form.xObject;"entity";$entity)
(The result will be the same, but the difference may be more than 10 times
faster)
If you can tell me in less than 10 seconds the correct answer, AND if you can
explain why, then may be you don't need to come. May be.
This is just one very small example of what we will cover during Day 2. In
fact, during the Tour 2017, we've presented the objects. It was like teaching
the letters of the alphabet. During the Summit 2018, we've shown you how to
build words with these letters. During the WT 2019, we will demonstrate how
simple it is to write sentences, and I mean, not only putting words together,
but building meaningful sentences, and even adding a touch of poetry...
I've spent a great lot of time to work with ORDA, to analyse, to measure, to
discover, to make mistakes, to correct these mistakes and make mistakes again,
in order to find the easiest possible path in the programming jungle. My
purpose is to share all this experience with you.
Just from my part (Add and Will can explain their stuff by themselves), I
intend to show at least these topics:
- Handling Entity Selections to do what seems impossible to do, by mixing
selections (even of different Tables) and collections into the same model.
- Reducing the Code to Ultimate Simplicity through a detailed understanding of
how 4D manages the different kind of Objects behind the curtain.
- Moving safely and easily Classic mode to ORDA, step by step, without breaking
the code.
- Reducing drastically the number of processes by using DIALOG(...;*), CALL
FORM, Dynamic Subforms, etc.
Plus a lot of Tips & Tricks like what to do with 'FORM Convert to dynamic'
command, the use of the new Formula Object to prepare the future programming,
etc.
If you are a 4D Classic Developper for many years, you will see that you can
really improve performances with very few modifications of your code.
If you are a New 4D Developper, you will learn the Best Practices while getting
the News, How-tos, and Views on V17.
Ad if you are a 4D Classic Developper who wants to rediscover the joy of
programming, tired to juggle with Current Selections and Current Records, this
training is nothing less than a Must...
I already told you that V17 is the biggest improvement in 4D, even more than
Client-Server and Multi Process, and you've seen I was right.
And I'm still ready to bet that you will learn enough to make this training a
good investment!
Let's meet in Chicago, Boston, Atlanta, Austin, Seattle, San José, London,
Manchester, Den Haag, Stockholm, or Malmö.
My very best,
JPR
I seek not to know the answers, but to understand the questions. (Confucius)
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Caching URLs. Hashed or unhashed ?
Hi I am caching the responses from a commercial API services to save costs. (i.e. the code does a lookup on a 4D table on the exact URL of the API call to see if we already have that response in the cache). What is people’s opinion on best practice for storing and querying on URL’s ? Should we hash them (say with MD5 Digest or something) in case the URL has dodgy characters like back-slashes or @ that might screw up 4D's query algo and then search on the hash instead ? Best Regards Peter ** 4D Internet Users Group (4D iNUG) Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:4d_tech-unsubscr...@lists.4d.com **
