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

ESUG Videos
by Norbert Hartl Oct. 20, 2019

Oct. 20, 2019

It has been a while since ESUG took place in cologne. We are sorry for the delay in providing the videos of the talks but the end of summer was a busy time for the guy doing the videos and there is quite some material to post-process. Talk videos are prepared now and we start soon to upload them to the github channel at [1]. Additional to the talks we ordered a short image video for the conference so people get an impression what the event is like. As a teaser before the uploading starts we want to make the image video available to you https://zweidenker.de/en/esug-conference-2019/ <https://zweidenker.de/en/esug-conference-2019/> As soon as there are videos available Marcus will drop a note about it. Hope you like it! the ZWEIDENKER Team [1] https://www.youtube.com/channel/UCO-vBhaKVZf0al-ISMMPvRw <https://www.youtube.com/channel/UCO-vBhaKVZf0al-ISMMPvRw>

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Strategy for investigating test failures
by PBKResearch Oct. 20, 2019

Oct. 20, 2019

Hello all I would be grateful for hints on strategy in investigating test failures on upgrade. It is an area in which I have no experience; I can see some brute force approaches, but I suspect there are cleverer ways to do it. I have OmniBase working successfully on Moose Suite 6.1 (Pharo 6.0, Latest update: #60541, 32-bit) on Windows 10. All the tests are green, and everything I have tried for my own data works well. To get a bit nearer to the state of the art, I tried to load OmniBase into a new 32-bit Pharo 7 image, created via Pharo Launcher a few days ago. I now have all tests green except one - named 'testBTreeKeyLocking'. Since I am working in single-user mode, I do not expect to need key locking, so I could go on without worrying about it. But I am left with a nagging worry, and I would like to find out what is wrong. The test method has altogether 8 assert/deny statements, so I do not know where to start. 1. Is there any obvious reason why the upgrade should make working code fail? Does P7 have a different compiler? If so, can I switch to an older compiler and see if it is that? (On P6 andP7, the code mentor complains that it should use 'assert:equals:' rather than 'assert:' and = , but that is true in all the other test methods.) 2. Is there any easy way in the test framework to work out which assert/deny has failed? 3. I could insert 'self halt' all over the place and use the debugger, or run the method in debug mode; would this be an approved way of doing it? The test suite creates and manipulates tiny databases; I am not sure whether there might be timing issues in stepping through the code. Any help or suggestions gratefully received. Peter Kenny

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New to Pharo. "Could not coerce arguments" (Problem with character encoding?) + Learning resources?
by M O Oct. 19, 2019

Oct. 19, 2019

Hi, I'm new to Pharo, and generally, in programming. I decided that my first programming language is going to be Pharo. However I have encountered some issues when I was exploring some examples. I don't want them to bother me later, so I'd like them to be resolved as soon as possible. Some info: OS: Windows 8.1, language Polish, Pharo version: 7 stable 64, Pharo Launcher installed in C:\PharoLauncher, images and VMs located in C:\users\<user>\Documents\... My Windows account (admin user) username contains non-ASCII character ("Å"). I tested all cases below on account with only ASCII characters ("Administrator") and they all work just fine. Therefore I strongly suspect the main source of issues is character encoding but I have no idea how to solve it or if it's actual problem. Noticed that #1 and #2 fails when attempting to perfom FFI call Here's the list of things with issues I encountered: 1. AthensDemoMorph example (Args-1 and Args-2) 2. Downloading packages from git repository (Git-1 and Git-2) In second example it goes straight to downloading from git repo, while first throws error 1. Pharo Mooc (Mooc) Instead of "Å" there are displayed some "rubbish" characters I opened debugger in case #1 and #2 (On personal account) and noticed that variable "ec" (error code I guess) has value 29 (See "invokeWithArgs") in method "invokeWithArguments", and variable "errCode" has value 6 (See "externalCallFailed") in method "externalCallFailed". I guess those values are related to Windows error codes so I looked them up on Microsoft site. For 6 I found it's error "ERROR_INVALID_HANDLE", while for 29 it's "ERROR_WRITE_FAULT". As I mentioned above, this might be character encoding problem, but this is just my guessing. Hope you can help me resolve it. Second thing I'd like to ask is, what are best up to date learning resources for Pharo? I'm mainly concerned about tools. I know a bit about idea of "real" OOP (from Alan Kay's talks). Is Mooc (http://mooc.pharo.org/) and Pharo by Example 5 enough for start? For Mooc, do I need to use Mooc image (It uses a bit outdated Pharo version) or can I use simply Pharo 7?

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Re: [Pharo-users] Glorp + P3 + SQLite
by Todd Blanchard Oct. 19, 2019

Oct. 19, 2019

I should probably mention that I do not really have a great handle on how package configurations work these days. Coming back to Smalltalk after a long time away. Pointer to an explanation of how package configurations work would be great.

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Re: [Pharo-users] Glorp + P3 + SQLite
by Sven Van Caekenberghe Oct. 19, 2019

Oct. 19, 2019

Hi Todd, Both specify their dependency on Glorp almost the same way: P3: spec baseline: 'Glorp' with: [ spec repository: 'github://pharo-rdbms/glorp:master/']. Sqlite3: spec baseline: 'Glorp' with: [ spec repository: 'github://pharo-rdbms/glorp' ]. What exactly is the conflict ? Sven > On 19 Oct 2019, at 10:26, Todd Blanchard via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > From: Todd Blanchard <tblanchard(a)mac.com> > Subject: Glorp + P3 + SQLite > Date: 19 October 2019 at 10:26:10 GMT+2 > To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> > > > I loaded GLORP+P3 without issue. > > Trying to load SQLite3 - it also wants to load GLORP which complains of conflict. > > For P3 I used: > > Metacello new > > > baseline: 'P3' > ; > > repository: 'github://svenvc/P3' > ; > > load: 'glorp'. > > > For SQLite: > > Metacello new > > > repository: 'github://PierceNg/glorp-sqlite3:pharo7' > ; > > baseline: 'GlorpSQLite' > ; > load. > > > but this fails with a conflict. I suspect the conflict is it wants to load in glorp again. > > I would also like to have mysql driver at some point. > > Any tips for getting these to play nice together would be great. > >

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Glorp + P3 + SQLite
by Todd Blanchard Oct. 19, 2019

Oct. 19, 2019

I loaded GLORP+P3 without issue. Trying to load SQLite3 - it also wants to load GLORP which complains of conflict. For P3 I used: Metacello new baseline: 'P3'; repository: 'github://svenvc/P3'; load: 'glorp'. For SQLite: Metacello new repository: 'github://PierceNg/glorp-sqlite3:pharo7'; baseline: 'GlorpSQLite'; load. but this fails with a conflict. I suspect the conflict is it wants to load in glorp again. I would also like to have mysql driver at some point. Any tips for getting these to play nice together would be great.

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VW -> Pharo
by eftomi Oct. 19, 2019

Oct. 19, 2019

Hi, What is currently the most efficient way to import a parcel / code from VW 8.3 to Pharo 7 or 8? Thanks and best wishes, Tomaz -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Smallest docker image for pharo >=7 ?
by HernÃ¡n Morales Durand Oct. 18, 2019

Oct. 18, 2019

Hi guys, Because I am lazy and want to avoid searching through all DockerHub repository pages... Do you know a Dockerfile to generate the smallest possible docker image for Pharo? I am also interested in which stage you use to install packages into the image, and why? Do you copy the contained image into docker already built? or do you prefer install packages on building? (as done by pip -r requirements.txt) Anyone using xpra binding from subuser [1]? Anyone could make it work Pharo on Alpine since it uses different libc? Anyway sharing opinions would be also appreciated. [1] http://subuser.org/news/0.3.html Cheers. HernÃ¡n

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[ANN] Next Pharo Sprint: Oct 25
by Marcus Denker Oct. 18, 2019

Oct. 18, 2019

We will organize a Pharo sprint / Moose dojo Oct 25, starting at 10:00am. (Local Time Paris). Goals of this sprint: - Pharo 8: Fix issues from tracker https://github.com/pharo-project/pharo/issues <https://github.com/pharo-project/pharo/issues> Remote Sprint: Remotely, you can join us on Discord. During the sprint, we synchronize local and remote Pharo sprinters: http://pharo.org/contribute-events <http://pharo.org/contribute-events> We have added a Board to coordinate the work: https://github.com/orgs/pharo-project/projects/9 <https://github.com/orgs/pharo-project/projects/9> Known Local Sprint meetings - Lille/France: It will be at the Inria Lille, Building B, third floor (RMoD offices). As the building is not open to the public, please contact us before if you plan to come A list of all Pharo Event of the year an be found here: https://association.pharo.org/events <https://association.pharo.org/events>

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NVARCHAR and Glorp
by eftomi Oct. 17, 2019

Oct. 17, 2019

Dear all, I'm working on ADO database driver for Glorp by using Pablo's PharoCOM. The structure of the driver is similar to Sven's P3DatabaseDriver and P3Client (thanks, Sven for very clear architecture :-) ) and the work is progressing quite nicely. I can connect to SQL Server, PostgreSQL and create tables, insert and read data directly with ADO Connection and Recordset objects, and with Glorp, too. In next days I'll do some more testing, including Oracle, and publish the prototype on GitHub. The goal is not PostgreSQL, of course, but to finally reach SQL Server, Oracle and possibly MS Access, at least from Windows systems. One thing is bothering me though - SQL Server supports Unicode with NCHAR and NVARCHAR types, and when using INSERT INTO with literal strings these should be prefixed with N, like in N'This is a Unicode string' Does somebody remember whether Glorp can prefix the strings in that way when constructing SQL statements? I checked all the constants and string conversions under DatabasePlatform but haven't found anything related to this kind of prefixing. Thanks and best wishes, Tomaz -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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