- Pharo-users - lists.pharo.org

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

Re: [Pharo-users] P7 regression
by Hilaire July 26, 2019

July 26, 2019

Thanks for the tips. It is definitely a left over from porting DrGeo to P7 from P4/5/6 (not sure) But it can't really work as put:into: is used to write both sktech content (XML file) and its PNG preview. At some point in Pharo history both UTF8 and bitmap were using binary stream. Likely a putBinary:into: is needed too. -- Dr. Geo http://drgeo.eu

2 4

OrderedCollection as an instance variable
by sergio ruiz July 25, 2019

July 25, 2019

I'm implementing an instance variable as an OrderedCollection, and am doing something idiotic. I have an Artist class. An Artist can have many tracks: tracks ^ tracks ifNil: [ self tracks: OrderedCollection new ] tracks: anObject tracks := anObject Doing something like: a := Artist new. t := Track new. a tracks add: t Gives me the error: Artist(Object)>>doesNotUnderstand: #add: Once I get past that error, which will evaluate `a tracks`, I can run this. I get why it works the second time, but I don't get why it thinks the instance of Artist is the receiver of add: on the first run. Thanks! ---- peace, sergio photographer, journalist, visionary Public Key: http://bit.ly/29z9fG0 #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV http://www.codeandmusic.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

9 12

Re: [Pharo-users] [Seaside] Save the date: October 22nd in Ghent for a Smalltalk WebCamp
by Esteban Maringolo July 25, 2019

July 25, 2019

Hi, I look forward to meet many of you and put some real faces to the names :) Regards, Esteban A. Maringolo On Wed, Jul 24, 2019 at 2:23 PM Johan Brichau <johan(a)inceptive.be> wrote: > > Hi Seaside users, > > We are organising a Smalltalk WebCamp day in the Yesplan offices in Ghent on October 22nd. > > The idea originated in the Seaside channel of the Pharo discord group. However, itâs not supposed to be Seaside only. All Smalltalkers doing web development, possibly involving other technologies on top of Smalltalk, are encouraged to join. Letâs meet and exchange ideas. The topics are to be determined, following the idea of an unconference [1], except that, for practical reasons, we will ask you to confirm your attendance beforehand. > > More info to follow asap. > > Save the date and respond already to the group if you are interested to attend. > > Cheers > Johan > > [1] https://en.wikipedia.org/wiki/Unconference > > > _______________________________________________ > seaside mailing list > seaside(a)lists.squeakfoundation.org > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

1 0

[OrderedCollection] add a reference or a copy?
by sergio ruiz July 25, 2019

July 25, 2019

I think my understanding of OrderedCollections has been incorrect for a very long time. I have never had a situation where it mattered, but in modeling a current project, I think I have been approaching it incorrectly. Since I have been using Smalltalk, I assumed that a copy of an object is added to an OrderedCollection. A quick test shows that a reference to that object is added to the OrderedCollection. I just wanted a sanity check on this. Is this true with all collections? Thanks! ---- peace, sergio photographer, journalist, visionary Public Key: http://bit.ly/29z9fG0 #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV http://www.codeandmusic.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

3 3

Re: [Pharo-users] P7 regression
by Sven Van Caekenberghe July 24, 2019

July 24, 2019

That is correct, sk. #writeStreamDo: is enough though, #utf8 is the default encoding > On 24 Jul 2019, at 22:16, sk via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > From: sk <snoobabk(a)yahoo.ie> > Subject: Re: [Pharo-users] P7 regression > Date: 24 July 2019 at 22:16:50 GMT+2 > To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> > > > Hi Hilaire > > I downloaded latest Dr Geo and took a quick look at how the files are saved. > It looks like the xml contents are not encoded (in UTF-8) but simply written to a binary write stream, which means that when a WideString is written you should consistently get a badly encoded file. > > You could test this out by changing this code > DrGDirectoryLocal>>put: stream into: filename > (location asFileReference / filename) ensureDelete binaryWriteStreamDo: [ :fileStream | > fileStream nextPutAll: stream contents] > > > to rather be: > DrGDirectoryLocal>>put: stream into: filename > (location asFileReference / filename) ensureDelete > writeStreamEncoded: 'utf-8' > do: [ :fileStream | fileStream nextPutAll: stream contents ] > > When I made this modification it worked for me i.e. the file was readable and correctly encoded. > > Regards > Carlo > > On 24 Jul 2019, at 21:07, Hilaire <hilaire(a)drgeo.eu> wrote: > > [...] > stream := WriteStream on: (String new: 4000). > DrGeoXml new > app: self app; > saveOn: stream. > [...] > > DrGeoXml>>saveOn: stream > | doc writer root | > doc := XMLDocument new version: '1.0'. > writer := XMLWriter on: stream. > root := XMLElement named: #drgenius. > self writeFigureAsXmlTo: root. > doc addElement: root. > doc printXMLOn: writer. > > The stream is passed to the XMLWriter, then it goes down to each items > of the sketch to write its own XML node. > > For example, to write its basic information as its name, where I have issue: > > writeAsXmlTo: aNode > "return the newly created element" > | node | > self rehash. > node := XMLElement named: self basicType attributes: Dictionary new. > node attributeAt: #type put: self nodeType; > attributeAt: #name put: (name ifNil: ['']); > attributeAt: #id put: self hash asString. > self writeParentsAsXmlTo: node. > aNode addElement: node. > ^node > > This code is as is since about 2005-2007 > > I will dig in it but it is strange. > > > Le 24/07/2019 Ã 18:45, Sven Van Caekenberghe a Ã©crit : >> But how do you write it to a file then ? >> >> FileLocator desktop / 'hilaire.xml' writeStreamDo: [ :out | out << 'Les Ã©lÃ¨ves FranÃ§aises ont 10 â¬' ]. >> >> (FileLocator desktop / 'hilaire.xml') contents. >> >> ">> 'Les Ã©lÃ¨ves FranÃ§aises ont 10 â¬'" > > -- > Dr. Geo > http://drgeo.eu > > > > > > >

1 0