July 2019 - Pharo-users - lists.pharo.org

Can I control the location of the PharoDebug.log
by Dale Henrichs Aug. 7, 2019

Aug. 7, 2019

It appears that the PharoDebug.log can be dropped into the directory from which a Pharo image is launched ... I would have expected it to be dropped into the local directory, but that does not appear to be the case ... I've looked in the Settings Browser and there does not appear to be a way to influence the location of the PharoDebug.log. I am currently using the `st` command line handler if that is important. I've googled for PharoDebug.log to no avail. Any help will be appreciated, Dale

3 4

Mindmaps and WardleyMaps in Pharo
by Rafael Luque Aug. 1, 2019

Aug. 1, 2019

I'm looking for drawing some mindmaps and (obviously) I'd like to be able to draw and visualize them inside my own Pharo tools. I've found this video in Stephan Eggermont's channel: https://vimeo.com/136943448 Do you know any other alternatives for Pharo? BTW, I also found this other video about Wardley maps: https://vimeo.com/141653455 I found it very interesting. Somebody knows where can I find this project? Thank you!

3 3

more fun with System>>Local directory settings
by Dale Henrichs Aug. 1, 2019

Aug. 1, 2019

... the last time we talked[1], I was wondering why my System >> Local directory setting was pointing to a location that dated back to a project I abandoned 6 months ago and learned that that path was stashed in $HOME/.config/pharo ... I've finally found the cycles to work on the Pharo portion of my project. I've deleted the whole $HOME/.config/pharo and re-downloaded a fresh set of image and changes files (the previous image and changes files had been polluted by the previously cached values) and discovered that the act of starting the image automagically populates the System >> local directory with a full path to a directory in my current directory ... which is not quite as bad as pointing off to a "local directory" located in "outer space" ... but I assume that I will have the same problem that I had before[2] which is a walkback when attemptingÂ to use the .image file on a machine where the saved local directory path will not exist (similar stack BTW as already reported against pharo in this bug report[3]. What I want to do is create a Pharo.image (i.e., load some code into the image) in such a way that I can ship the image file to users on a completely different system and have them successfully execute the code in the image ... I assume there is a way to do this, since the images I download don't suffer from this problem ... I naively cleared the Local directory field in the system browser, saved and quit the image and then got this error: which is presumably a relative of this error[3]. I used the folder icon to select my local directory again ... saved the image and restarted only to get the same walkback: Keep in mind the ultimate goal ... shipping an image to another user and making it possible for them to use it ... Thanks in advance for any help, Dale [1] http://forum.world.st/where-are-system-settings-stored-td5101501.html [2] https://travis-ci.org/dalehenrich/st_launcher/builds/561863077#L603 [3] https://github.com/pharo-project/pharo-launcher/issues/37

2 3

Warning Newbie Question: Bootstrap Navbar example works my copy and paste fails?
by ian Aug. 1, 2019

Aug. 1, 2019

Hi All, Hopefully this is an easy one? I have been going through the MOOC exercises and have come across something I can't seem to figure out. In the example the code reads: ---- renderExampleOn: html | bar id| id := 'navbarSupportedContent'. bar := html navigationBar. bar beLight; expandLarge. bar background beLight. bar with: [ html navigationBarBrand: 'Navbar'. ] ---- Mine reads exactly the same but errors in the browser with: ---- Seaside Walkback MessageNotUnderstood: WAHtmlCanvas>>navigationBar Debug Proceed Full Stack Possible Causes you sent a message this type of object doesn't understand Stack Trace thisContext WAHtmlCanvas(Object)>>doesNotUnderstand: #navigationBar self a WAHtmlCanvas thisContext VIHeaderComponent>>renderContentOn: self a VIHeaderComponent thisContext WARenderVisitor>>visitPainter: self a WARenderVisitor thisContext WARenderVisitor(WAPainterVisitor)>>visitPresenter: self a WARenderVisitor thisContext WARenderVisitor(WAPainterVisitor)>>visitComponent: self a WARenderVisitor ---- When using Finder to locate the selector, navigationBar, I notice that it is a selector of SBSHtmlCanvas. So my question is: How to I set up my rendering class in seaside properly? Currently, as per all I can find I am properly using WAComponent as application super class. I don't see anything in the seaside book regarding bootstrap and I am fallowing the MOOC section on bootstrap almost to a tee. Accepting the fact that the library is now SBSDeploymentLibrary rather than TBSDeploymentLibrary. Any help would be greatly appreciated. Kindly, Ian

4 5

Available to join a project
by Sebastian Sastre July 30, 2019

July 30, 2019

Hi guys, Iâve finished a contract and in the next weeks, Iâll be exploring opportunities to join a new project. Lately, Iâve been working with JavaScript full-stack and docker, AWS, GCloud among other things. By the way, some of the microservices I ran in AWS are deployed as dockerized Pharo images set up as auto-scalable in ElasticBeanstalk. So, after lots of JavaScript and TypeScript, now Iâm curious about joining a Smalltalk project :D You might remember me for trying with Airflowing, this SaaS startup built on Seaside which unfortunately didnât fly far enough but had thaught me LOTS of lessons and made me solve lots of interesting problems with Smalltalk. Let me know if you want to chat to see if I could help with your company/project! You can write me to: sebastianconcept(a)gmail.com Sebastian Sastre More about my developer story here: http://sebastiansastre.co <http://sebastiansastre.co/>

1 0

Re: [Pharo-users] [Pharo-dev] [ANN] OSWinSubprocess a library to spawn Windows System processes
by Torsten Bergmann July 30, 2019

July 30, 2019

Without having a deeper look I guess what was done for Windows now is wrapping the usual STARTUPINFO, CreateProcess() functions and friends yet again ... Such wrappers and many other native friends were created from my side already years ago with my "OS-XXX" series of projects for different platforms: - http://smalltalkhub.com/#!/~OS/OS-Windows - http://smalltalkhub.com/#!/~OS/OS-OSX - http://smalltalkhub.com/#!/~OS/OS-Unix - http://smalltalkhub.com/#!/~OS/OS-Linux-CentOS - http://smalltalkhub.com/#!/~OS/OS-Linux-Ubuntu - http://smalltalkhub.com/#!/~OS/OS-Raspbian So for instance on Windows you could easily use WinProcess createProcess: 'explorer.exe' or WinProcess createAndWaitForProcess: 'cmd.exe'. The projects are available on Github now since 2018 and kept up to date for recent Pharo versions. - https://github.com/astares/Pharo-OS-Windows - https://github.com/astares/Pharo-OS-OSX - https://github.com/astares/Pharo-OS-Unix - https://github.com/astares/Pharo-OS-Linux-Ubuntu - https://github.com/astares/Pharo-OS-Raspbian All of them are available in Catalog. I have no problem with more and more implementations and the double efforts. But for Pharo users I have the feeling that it gets more and more confusing in the area of OSProcess, OSSubProcess, OSWinSubprocess, .... and more wrappers for basically the same thing ... Bye Torsten (aka astares)

5 4

Re: [Pharo-users] Pharo-users Digest, Vol 75, Issue 41
by ian July 29, 2019

July 29, 2019

On Mon, Jul 29, 2019 at 12:00:07PM -0400, pharo-users-request(a)lists.pharo.org wrote: > Send Pharo-users mailing list submissions to > pharo-users(a)lists.pharo.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.pharo.org/mailman/listinfo/pharo-users_lists.pharo.org > or, via email, send a message with subject or body 'help' to > pharo-users-request(a)lists.pharo.org > > You can reach the person managing the list at > pharo-users-owner(a)lists.pharo.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Pharo-users digest..." > > > Today's Topics: > > 1. Warning Newbie Question: Bootstrap Navbar example works my > copy and paste fails? (ian) > 2. Re: Warning Newbie Question: Bootstrap Navbar example works > my copy and paste fails? (jtuchel(a)objektfabrik.de) > 3. Re: Warning Newbie Question: Bootstrap Navbar example works > my copy and paste fails? (Esteban Maringolo) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sun, 28 Jul 2019 21:02:01 -0400 > From: ian <ian(a)icjohnson.com> > To: pharo-users(a)lists.pharo.org > Subject: [Pharo-users] Warning Newbie Question: Bootstrap Navbar > example works my copy and paste fails? > Message-ID: <20190729010201.GA11499(a)desktop.icjohnson.com> > Content-Type: text/plain; charset=us-ascii > > Hi All, > > Hopefully this is an easy one? > > I have been going through the MOOC exercises and have come across something I can't seem to figure out. > > In the example the code reads: > > ---- > renderExampleOn: html > > | bar id| > id := 'navbarSupportedContent'. > bar := html navigationBar. > bar beLight; expandLarge. > bar background beLight. > bar with: [ > html navigationBarBrand: 'Navbar'. ] > > ---- > > Mine reads exactly the same but errors in the browser with: > > ---- > > Seaside Walkback > MessageNotUnderstood: WAHtmlCanvas>>navigationBar > > Debug Proceed Full Stack > Possible Causes > > you sent a message this type of object doesn't understand > > Stack Trace > > thisContext > WAHtmlCanvas(Object)>>doesNotUnderstand: #navigationBar > self > a WAHtmlCanvas > > thisContext > VIHeaderComponent>>renderContentOn: > self > a VIHeaderComponent > > thisContext > WARenderVisitor>>visitPainter: > self > a WARenderVisitor > > thisContext > WARenderVisitor(WAPainterVisitor)>>visitPresenter: > self > a WARenderVisitor > > thisContext > WARenderVisitor(WAPainterVisitor)>>visitComponent: > self > a WARenderVisitor > > ---- > > When using Finder to locate the selector, navigationBar, I notice that it is a selector of SBSHtmlCanvas. > > So my question is: How to I set up my rendering class in seaside properly? Currently, as per all I can find I am properly using WAComponent as application super class. > > I don't see anything in the seaside book regarding bootstrap and I am fallowing the MOOC section on bootstrap almost to a tee. Accepting the fact that the library is now SBSDeploymentLibrary rather than TBSDeploymentLibrary. > > Any help would be greatly appreciated. > > Kindly, > > Ian > > > > ------------------------------ > > Message: 3 > Date: Mon, 29 Jul 2019 09:40:31 -0300 > From: Esteban Maringolo <emaringolo(a)gmail.com> > To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> > Subject: Re: [Pharo-users] Warning Newbie Question: Bootstrap Navbar > example works my copy and paste fails? > Message-ID: > <CAJMgPC+TGk+q-8QU9S7im06ARgkKT-3eC51hCNMRuB=8vFGG+A(a)mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > You're using the Bootstrap 4 library and methods. > > I don't know about the one referenced in the MOOC, but there are > several differences between Torsten's Bootstrap 3 (TBS prefixed > classes) and Bootstrap 4 (SBS prefix), in particular because Bootstrap > 4 library wrapper uses a subclass of WAHtmlCanvas where all the > methods are implemented. > > See if your component implements #rendererClass it should return > SBSHtmlCanvas as its renderer class instead of the default, inherited, > WAHtmlCanvas. > > Regards, > > > Esteban A. Maringolo > Thanks Esteban, In the playground: ---- | header | header := VIHeaderComponent new. header rendererClass. ---- Returns: WAHtmlCanvas and not SBSHtmlCanvas. ---- Thus the fix was to override rendererClass and return the correct rendering class. Nowhere in the documentation is this evident (although if I was ST proficient I would have been able to figure that out? Thanks Muchly Esteban!!

1 0

Personal Programming
by Trygve July 28, 2019

July 28, 2019

Dear all, The final draft of my magnum opus about Personal Programming is now ready for review: http://folk.uio.no/trygver/themes/Personal/PP-019%20-%20Copy%20(17).pdf The article's main theme is Personal Programming for everybody with /Loke/, a personal object computer. Its first purpose is to empower laypeople to take control over their corner of the Net with its IoT. I have created a proof-of-concept implementation as a non-intrusive extension of Squeak version 3.10.2, and have used it to demonstrate how a novice uses the Loke IDE to create a small and intuitive program. The article describes the concepts behind Loke .The current Squeak implementation should be ported to Pharo and can grow into the preferred Pharo-based IDE for laypeople taking control over their information environment. I will appreciate your possible comments before Aug. 31. Enjoy --Trygve The article's 43 pages has several high points, I have included one of them here: ----------- begin extract ------------------ C.7.We need a paradigm shift The history of Western astronomy shows a series of paradigm shifts from the geocentric paradigm with its stationary Earth as the center of the Universe with its epicycles and other bizarre explanations of what appeared to be essential complexities. Astronomy evolved via the heliocentric to the current distributed paradigm with its chunks of mass connected by gravity. What appeared as essential complexity in one paradigm was easily resolved in the next. It is tempting to look for similar paradigm shifts in computing. Mainstream programming has based much of its theory and practice on the CPU-centric paradigm exemplified by the von Neumann machine. A memory-centric paradigm came in 1960 with the Autokon CAC/ CAM system and its central database (Reenskaug, 1973). The solution was obvious, and there must have been many similar initiatives without me being aware of them. It is time to realize that the first two paradigms do not meet our current challenges: We are plagued with immensely large, complex, and insecure systems that long ago left the realm of human understanding. A recent example: Customers found that their bank charged them twice for the same transaction. Several weeks after the problem was discovered, the bank publicly admitted that they still didn't understand how the problem could arise: The complexity of their system was clearly beyond human comprehension. The bank has a staff of very competent experts, but they need a better foundation for modeling and implementing their sophisticated requirements. Computers can transform, store, and communicate data, (Figure below). The essence of the CPU-centric paradigm is that computers are primarily used to transform data; they compute. The essence of the memory-centric paradigm is that computers are used primarily to store data; they organize applications around a shared database. The essence of the communication-centric paradigm is that computers are primarily used to exchange messages with other computers to make them collaborate to achieve a common goal. /The three paradigms of computing // /// It is time to heed Tony Hoare's plea for simplicity and achieve a better way of separating concerns. Mainstream programming should shift to the communication-centric paradigm exemplified by the object computer that is the foundation for this article. The communication-centric paradigm has been on the horizon for many years. I first met it in Prokon's idea of distributed computers (Reenskaug, 1977), but there must have been many other initiatives. A newer example is Service-Oriented Architectures (SOA) that, in essence, is communication-centric. It didn't meet with immediate success, possibly because people tried to apply it within the CPU-centric paradigm where it doesn't belong. There are many other examples such as distributed computing. And of course, DCI and the IoT itself are, by definition, communication-centric. ----------- end extract ------------------

5 6

How to modify a non-forked Iceberg repository to create a pull request
by Esteban Maringolo July 27, 2019

July 27, 2019

I was working on something using Glorp, loaded as a Metacello dependency cloned directly from the pharo-rdbms/Glorp GitHub repo. Then I found what I think is a bug, make a few modifications and make created a new commit. I cannot commit to the `origin` remote since I'm not a member, but I can't create a pull request, because I started from the "upstream" repo as my base. What should be the way to solve this without losing the local changes (commited but not pushed)? I thought: - Fork the pharo-rdbms/Glorp repository in my own GitHub user - Add a new remote (via CLI) to my Glorp local (pharo) repositorypointing to the one at my user (emaringolo/Glorp). - Fetch and checkout from the remote pointing to my repository - Merge my local changes into my repository - Push my changes - Create a pull request from eMaringolo/Glorp to pharo-rdbms/Glorp Is this wrong? What do you suggest? I think this might happen to anyone who started working on some repository that is not a fork of the canonical and then tries to make changes to it. Regards, Esteban A. Maringolo

2 2

[ANN] Pharo Newsletter July 2019
by Marcus Denker July 27, 2019

July 27, 2019

The Pharo Newsletter July 2019 has been sent to subscribers one week ago. https://mailchi.mp/pharo/pharo-newsletter-july-2019 <https://mailchi.mp/pharo/pharo-newsletter-july-2019> To get it as soon as it is released, please subscribe here: http://eepurl.com/bykqWn <http://eepurl.com/bykqWn>

1 0