July 2016 - Pharo-users - lists.pharo.org

SQLite and sure last_insert_rowid
by Hilaire July 21, 2016

July 21, 2016

Hi guys, In a multi-thread context use of Sqlite, I try to find out how one will fetch securely the automatically last row index of a Primary key. The problem seems to be that between the insert of rows in a table and the moment you request the last row id, you may have another insert from another thread in the same database. In the code bellow, I put the insert and last_insert_rowid() call in a transaction. The returned rowid value is the right one as expected, and now I am wondering if enclosing in a transaction is enought to make the last_insert_rowid() safe. Any trips how you handle this situation? Thanks Hilaire The organisation table is defined as: CREATE TABLE organisation ( idOrg INTEGER PRIMARY KEY, name VARCHAR(30), address TEXT, zipcode INTEGER, city VARCHAR(30), phone VARCHAR(15), email VARCHAR(20) );' The code is as follow: | row res s id | database execute: 'INSERT INTO organisation (name) values (''Pharo consortium'')'. res := database beginTransaction. self assert: res = 0. s := database prepare: 'INSERT INTO organisation (name, address, zipcode, city, phone, email) values (?, ?, ?, ?, ?, ?)'. s at: 1 putString: 'Dupont & co'. s at: 2 putString: '12, rue du pont'. s at: 3 putInteger: 75000. s at: 4 putString: 'Paris'. s at: 5 putString: '0105060708'. s at: 6 putString: 'contact(a)dupont.fr'. s step. s finalize. row := database execute: 'SELECT last_insert_rowid()'. res := database commitTransaction. id := row next at: 'last_insert_rowid()'. row close. self assert: res = 0. self assert: id = 2. -- Dr. Geo http://drgeo.eu

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change which browser opens when browsing senders/implementors
by PAUL DEBRUICKER July 20, 2016

July 20, 2016

Which method should I change if when browsing senders/implementors there is only one sender or implementor I'd like the Nautilus browser to open? thanks Paul

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Image not starting
by Valentin Ryckewaert July 20, 2016

July 20, 2016

Hello everyone, I'm currently working on the project file policy and I'm having a problem that I don't understand I import my code, configure my image as readOnly (Pharo won't try to write on changesFiles,source,image....), set the folder of the image in readonly and try to open the image again and it's not possible, I don't get any stacktrace so it's hard to understand the problem. PS : If we set back the folder in write mode, it's possible again to open the image again. Here is the code to reproduce the bug, could someone give me a clue please? sudo rm -r testPharo mkdir testPharo cd testPharo echo "Metacello new smalltalkhubUser: 'Uryon' project: 'Coral'; configuration: 'Coral'; version: #development; onConflictUseIncoming; load. SmalltalkImage configureSystemAsReadonlyAndQuit:true " >> load.st mkdir coral cd coral curl get.pharo.org/alpha | bash curl get.pharo.org/vm60 | bash pharo-vm/pharo Pharo.image ../load.st cd .. chmod -R -w coral coral/pharo-vm/pharo coral/Pharo.image

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State of Pharo in comparison with the "Pharo vision" document
by Julien Delplanque July 19, 2016

July 19, 2016

Hello everyone, For a university project I need to write a little about Pharo. I found the "Pharo vision" document [1] and I am curious about the actual state of Pharo in comparison with it. I have seen some things on the mailing list but I would like some help to gather the state of each goal described in "Pharo vision" version 1.0. I made a list with the goals and wrote some of the (little) knowledge I have about some elements (I also joined it to this mail in case it is not readable): Goals -> State ------------------- 1. Creation of the Pharo Consortium -> Created 2. Small kernel & validated packages -> ? 3. A Robust and Extensible System Events -> ? 4. Rewrite of Filesystem/Streams -> ?/XStream? 5. Announcements and Ephemerons -> ? 6. UI Canvas for Zoomable Interfaces -> Bloc? 7. Bootstrap of the Core -> ? 8. Fully parametrized compiler tool chain -> ? 9. Packages as real objects -> ? 10. Package Meta-Data -> PackageManifest? 11. Less Model Clutter and Duplication -> ? 12. Building and Reusing UI Logic -> Spec? 13. New Network Layer -> ? 14. Serializers -> Fuel 15. SystemChangeNotifier replacement -> ? 16. Cleaning Morphic -> Still valid? (asking because of Bloc existance) 17. Everybody should be able to compile VMs -> ? 18. VMs identification and regression testing -> ? 19. One Unified FFI framework -> Created and still being enhanced 20. 64 Bits -> I saw the screenshot on Twitter but what is the state now? 21. New Object Formats -> ? If some of you know the state of one or many of these project and have the time to give me some information about it/them, I would be really grateful. Thanks in advance, Julien Links: [1]: https://gforge.inria.fr/frs/download.php/30434/PharoVision.pdf

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more chapter of Spec book
by stepharo July 19, 2016

July 19, 2016

Here are two chapter of the forthcoming spec booklet. Stef

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Twitter Data Selfies: Our next project/problem for the upcomming Data Week.
by Offray Vladimir Luna CÃ¡rdenas July 18, 2016

July 18, 2016

Hi, I just want to let you know that we will be starting our next Data Week in few days. It's a 6 days intensive hackathon-workshop split in two sessions from Thursday to Saturday each one in. Next one will be on Jul 21 to 23 and Jul 28 to 30. As usual, we work with an approach from data activism & visualization. It's an event directed towards a broader diverse population, coming from art, journalism and with different levels of expertise, specially newbies, all interested in data visualization. As a result we improve the tools [1] and packages [2] and learning materials [3] (Spanish). Is a good way to bridge local and international community. You can find more information (in Spanish) about the event and our tool at [3a] and [3b]. Four our next project, we will work on our a project called Twitter Data Selfies (draft info at [4]). I will keep you posted about our advancements, improvements and problems here and in slack and share some more in real time, using the #DataWeek4 hashtag on Twitter [5]. Cheers, Offray == Links: [1] http://smalltalkhub.com/#!/~Offray/Grafoscopio [2] http://smalltalkhub.com/#!/~Offray/Dataviz [3] http://mutabit.com/repos.fossil/grafoscopio/wiki?name=inicio [3a] http://mutabit.com/dataweek/ [3b] http://mutabit.com/grafoscopio/ [4] http://mutabit.com/offray/blog/en/entry/ds-twitter-mockup [5] https://twitter.com/hashtag/DataWeek4?src=hash

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Visual coding with Pharo
by Dimitris Chloupis July 18, 2016

July 18, 2016

I am having a ton of fun doing visual coding with Unreal engine's visual coding language "Blueprint" which a full blown live programming language. Was wondering what Pharo has to offer on this field I know about Phratch Is there anything else ? I would like try to play around with this concept. I remember Sean used to have a prototype around.

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Re: [Pharo-users] Shortcuts for navigation history in Pharo5
by Ben Coman July 18, 2016

July 18, 2016

Thanks Davide. If its not too much trouble and you'd like to learn a bit more about the contribution process, could you submit your fix following the instructions at [1]. Create two issues, one with Milestone=Pharo5, and a subcase with Milestone=Pharo6. Policy is for fixes to be integrated to Pharo 6 first, then back ported to Pharo5. [1] http://pharo.org/contribute-propose-fix cheers -ben P.S. @admins, should [1] be updated from Pharo50Inbox to Pharo60Inbox ? On Mon, Jul 18, 2016 at 4:15 PM, Davide Varvello via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > ---------- Forwarded message ---------- > From: Davide Varvello <varvello(a)yahoo.com> > To: pharo-users(a)lists.pharo.org > Cc: > Date: Mon, 18 Jul 2016 00:31:32 -0700 (PDT) > Subject: Re: Shortcuts for navigation history in Pharo5 > Hi Stef, > > I was wrong, the descriptions exist in the Keymap Browser, but their > shortcut name are "next" and "previous". > A better name is #goBackInTheNavigationHistory and > #goForwardInTheNavigationHistory > > so the selector could be > NautilusUI class>>buildHistoryShortcutsOn: aBuilder > <keymap> > > (aBuilder shortcut: #goBackInTheNavigationHistory) > category: #NautilusGlobalShortcuts > default: $[ meta shift > do: [:target| target previous ] > description: 'Go back in the navigation history.'. > > (aBuilder shortcut: #goForwardInTheNavigationHistory) > category: #NautilusGlobalShortcuts > default: $] meta shift > do: [:target| target next ] > description: 'Go forward in the navigation history'. > > > Davide > > > stepharo wrote >> Hi Davide >> >> add them to the description and send us a fix. >> >> Stef > > > > > > -- > View this message in context: http://forum.world.st/Shortcuts-for-navigation-history-in-Pharo5-tp4906689p… > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > >

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Spec, Icons in subclasses of ComposableModel
by Marion Noirbent July 18, 2016

July 18, 2016

Hi, In the issue 18742 add class to manage focusorder, Peter UhnÃ¡k says: " The idiomatic way of creating icons should be either #smallBackIcon asIcon (ideally) or the long-form (Smalltalk ui icons iconNamed: #smallBackIcon) " But there is a third way, ComposableModel defines iconNamed: like that ComposableModel>>iconNamed: aSymbol ^ Smalltalk ui icons iconNamed: aSymbol So it is possible to use self iconNamed: #smallBackIcon So my question is: what way is really ideal ?

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Dynamic visualzation and analysis of tweets
by Arturo Zambrano July 18, 2016

July 18, 2016

Hi All, please check this> https://youtu.be/VL14jTDvRaY this is Agustin Meriles's work for his master thesis. We want to share this with the community and a big *thank you* for your support... specially the Roassal team. Now the hard time of writing the text comes for Agustin :) Cheers, Arturo

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