November 2011 - Pharo-users

Changing Cherokee for a Smalltalk based web server?
by Offray Vladimir Luna CÃ¡rdenas Nov. 18, 2011

Nov. 18, 2011

Hi all, I'm getting random "504 gateway error" answers from several sites (using Zope and Rails) that are served by Cherokee using a reverse proxy setup. This error is an open issue in Cherokee and has been reported and not properly patched since 2009: https://code.google.com/p/cherokee/issues/detail?id=504 I did choose Cherokee because of its easiness to setup and newbie friendly interface and character, but with this problem I'm thinking in testing another server, may be a Smalltalk based one that have similar characteristics and can serve sites in Zope or Rails also. I know about Comanche, Swazoo and Zinc, but I don't know which of them is better (making load balance and stuff like that) and have proper documentation about using it in combination with other software (Zope and Rails in my case). Any advice on this matter is greatly appreciated, Offray

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VSE / VW migration to Pharo
by Chantal Thibodeau Nov. 17, 2011

Nov. 17, 2011

Hi We want to migrate code from VisualWorks 3.0 to something else. It is a batch search engine so the GUI is extremely simple and could be rewrite from scratch. I tried the VW 7.0 but it is too costly (but it works perfectly fine with small adjusments in less than one hour). I installed Pharo and I am unabled to even load some code. I read that everything should be in the repository. Fine for the new code but what do I do with the "old" one ? I don't see anywhere to load a source file or a parcel file. I need some help. I also download Squeak, that I will try in the next days. The speed of execution is the main issue. Thanks a lot

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Pharse Node
by Pablo Herrero Nov. 17, 2011

Nov. 17, 2011

Hello everybody! I'm looking for documentation for the ParseNode class's hierarchy at the 'Compiler-ParseNodes' category. Does anyone know where I could find some? PS1: I'm working on a project where I need to do some runtime code manipulation, like creating AST Nodes on the fly and things like that. PS2: Is this the correct list to post this questing or pharo-project might be more apt? Cheers! Pablo

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The Pharo curse
by Jeff Gray Nov. 17, 2011

Nov. 17, 2011

In my day job I write a lot of documents. I'm finding that the more I use Pharo, when typing in MS Word I select a piece of text and press ( and then wonder where all the text has gone :-) Maybe the answer is to use Pharo for word processing... -- View this message in context: http://forum.world.st/The-Pharo-curse-tp4078843p4078843.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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[ANN] SqueakSource 3 RC 1
by Tobias Pape Nov. 16, 2011

Nov. 16, 2011

Dear All, I hereby release SqueakSource 3 RC 1 to the public. I wasn't able to come up with a nice name this time, so it is just 'the Release Candidate' :) Thanks to Dale, Norbert, and Philippe for their support, to many I met at ESUG'11 who gave good inspiration and anybody who listened and helped. == Improvements since the Beta: - Backgrounding does not fork but use a separate process on Squeak; Service VM on GS. - New feature: "well known name" for a Repo, like Squeaksource or gemsource... (So, that Gofer new gemsource: â¦ can be used in the Repo strings on the project sites) - Improvements in Sitemap building, XML-parser not required, plain Seaside - Pick up newer versions of several, esp. gemstone projects. Email support should be back now. - Fix display of "news" section - Fix for #9: Sorting of Projects can be confusing. - Fix: by default, non-world-read projects are not visible, now. - Fix for #7: "Tags" link responds with MessageNotUnderstood page - Fix for #22: SSProject>>versionAdded: forks a process - Fix for #23: Sitemap generation fails - Fix for #24: SSVersionAlreadyExists thrown by SSVersionView>>move:to: but not handled... - Fix for #27: MNU #ifNotEmpty: in SSEmailSubscription >> versionAdded:to: nukes gem - Fix for #29: add "breathing space" in tables'. - HTTP DELETE for versions (e.g., for future Monticello tool usage) - more tests. == The (up to now) sole instance is the HPIâs Software Architecture Groupâs Squeaksource, wich is not open to registration at the moment. However, I hope the GemStone ss3 instance will be migrated soon (http://ss3.gemstone.com) Install it yourself! Pharo: == Gofer new squeaksource: 'MetacelloRepository'; package: 'ConfigurationOfSqueakSource'; load. ((Smalltalk at: #ConfigurationOfSqueakSource) project version: '3.0-rc.1') load: #('All') == Squeak: == Installer ss project: 'MetacelloRepository'; load: 'ConfigurationOfSqueakSource'. ((Smalltalk at: #ConfigurationOfSqueakSource) project version: '3.0-rc.1') load: #('All') == GemStone (with ProjectGofer, else like pharo): == Gofer project load: 'SqueakSource' version: '3.0-rc.1' group: #('All'). == To come: === â¢ more tests â¢ moving and copying via backend (i.e., HTTP request) â¢ inboxes â¢ branch projects â¢ (converting squeaksource.com to a SqueakSource3 ;) ) === I hope you like it. Best -Tobias PS: Did you know that â¢ you can get a personal rss stream of your âfavouriteâ projects? (like following on github) â¢ you can set up parent projects for your projects and automatically move all your packages there? â¢ you can extend SqueakSource quite easily? (Example: Issues) â¢ you can install a stripped down version on SqueakSource? (e.g., without Issue tracking, Statistics or filesystem support)

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Seaside and Fuel
by Jeff Gray Nov. 16, 2011

Nov. 16, 2011

I am writing a Seaside application which will have a modest set of data to be persisted. I would like to use Fuel for the persistance, for its simplicity. I assume that Fuel will be a "load all data into memory" and "save all data back to disk" sort of a model. If so, I 'm wondering where I should do this in my code. I can attach the "load" to the entry page but the "save" is more tricky. Would it make more sense to attach these to start up and close down of the image? What do you reckon (or am I thinking about this all wrong)? -- View this message in context: http://forum.world.st/Seaside-and-Fuel-tp4075405p4075405.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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WAFile or link to file
by Foxugly Nov. 16, 2011

Nov. 16, 2011

Hi, I have a problem with WAFile, upload/download files. Of course i know this link : http://book.seaside.st/book/fundamentals/forms/fileupload but in my project I have to import/export all the datas and files and so I lose my WAFile objects So, is it possible to create a WAFile without the web interface (so without html uploadFile) or do you know how to make a link to an existing file on the server. can you help me ? best regards Renaud Vilain

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Exif package
by Francois Stephany Nov. 16, 2011

Nov. 16, 2011

Hi, Do somebody knows what happened to the Exif package? http://lists.gforge.inria.fr/pipermail/pharo-project/2010-November/036209.h… Thanks! Francois

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Adding a context menu to a Morph
by Sean P. DeNigris Nov. 11, 2011

Nov. 11, 2011

I added instructions to the online book... http://book.pharo-project.org/book/LanguageAndLibraries/GUI/contextmenus Sean -- View this message in context: http://forum.world.st/Adding-a-context-menu-to-a-Morph-tp3991117p3991117.ht… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Load package without warnings
by Francois Stephany Nov. 9, 2011

Nov. 9, 2011

Hi list, Is there a way to load packages without having to click 'Proceed' when you get warnings ? I'd like to add CommandShell in a metacello configuration loaded on a headless server... Cheers, Francois

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OOP: Managing a time-consuming model action from the UI
by Sean P. DeNigris Nov. 6, 2011

Nov. 6, 2011

I'm creating a media library service in Pharo. I have a DVDMorph class, with DVD as a model. One feature is to cache a DVD locally as a compressed disk image, which usually takes about 5 minutes. The ways I thought of were: 1. use announcements 2. pass blocks for updating and cancelling 3. immediately return some kind of DiskImageProxy that would stand in for the DiskImage until processing was done, and then replace (maybe with become?). I chose #2 because it seemed the easiest for my simple needs (I don't need multiple views); but it definitely made the API uglier, as I have to pass the update and cancel blocks through 3-4 methods. What do you think would be the best approach? Here's a simplified version of what I wrote (not refactored)... DVDMorph>>cache updateBlock := [ :progress | WorldState addDeferredUIMessage: [ progressMorph contents: progress asString ] ]. [ self dvd cacheUpdating: updateBlock cancelIf: [ self shouldCancel ] ] forkAt: Processor userBackgroundPriority. DVD>>cacheUpdating: aBlock cancelIf: cancelPredicate Resources library importAs: imageFileName after: [ :fileReference | CreateDiskImage from: self deviceFile to: fileReference updating: aBlock cancelIf: cancelPredicate. diskImage := fileReference ]. CreateDiskImage >>from:to:updating:cancelIf: process := PipeableOSProcess command: 'hdiutil create -srcfolder ', from, ' ', to. [ process isComplete ] whileFalse: [ self shouldCancel ifTrue: [ process processProxy sigint. ^ self ]. self updateStatus. (Delay forSeconds: 1) wait ] Thanks. Sean -- View this message in context: http://forum.world.st/OOP-Managing-a-time-consuming-model-action-from-the-U… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Nov. 3, 2011

Hi guys we have a roadmap for Esteban and we would like to share it with you. We have extra items that we would like to see fixed and we are welcoming your feedback/suggestions. Note this is typically the way we want to work with the consortium in the future: Build an initial roadmap and refine it based on the input of the community. - A website for the consortium registration (esteban is expert on that). - This is important for INRIA and for the visibility of the consortium. We should get new members :) - Integration with SmalltalkHub - Working on fixing bugs! - Debugger fixes - Continuous bug fixing. - Improving release process: faster, more people involved, simpler. - Working on metacello repositories for each distributions (everything is there but missing last bits) - Metacello tools - Automatic release validations - Automatic validation of fixes Now the free items with probably igor involvement - Multiwindowing support - Fully working multithreaded FFI with ***Documentation*** - Filesystem fix and integration - Integration of OPAL - RPackage integration Igor related - Ephemerons - Object format - VM branding - Use of new canvas - Event cleaning So we are waiting for your suggestions. Stef

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Enhancing SequenceableCollection>>combinationsAt:in:after:do:
by Runar Jordahl Nov. 3, 2011

Nov. 3, 2011

In Pharo 1.3, SequenceableCollection>>combinations:atATimeDo: will, for all combinations, send the same collection instance as argument for the block. Therefore, if you use this collection itself, you will be surprised: |answer| answer := OrderedCollection new. #(a b c) combinations: 2 atATimeDo: [:each | answer add: each]. answer Here I expect to end up with a collection looking like this: 1: #(#a #b) 2: #(#a #c) 3: #(#b #c) But I end up with: 1: #(#c #c) 2: #(#c #c) 3: #(#c #c) One fix is to change the client code to copy the argument for the block: |answer| answer := OrderedCollection new. #(a b c) combinations: 2 atATimeDo: [:each | answer add: each copy]. answer Another solution is enhancing SequenceableCollection>>combinationsAt:in:after:do: to copy the collection: nn + 1 to: self size do: [ :index | aCollection at: jj put: (self at: index). jj = aCollection size ifTrue: [ aBlock value: aCollection copy ] ifFalse: [ self combinationsAt: jj + 1 in: aCollection after: index do: aBlock ] ] Kind regards Runar Jordahl blog.epigent.com

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[pharo-users] Can't Load Magma in Pharo 1.3
by Ankur Sethi Nov. 2, 2011

Nov. 2, 2011

Hi, I'm new to Pharo and Smalltalk in general. I'm trying to build a small blogging application using Pharo and Seaside. I've decided to use Magma for persistence, but I'm having some issues loading it in Pharo 1.3. I loaded Magma the usual way: Gofer new squeaksource: 'MetacelloRepository'; package: 'ConfigurationOfMagma'; load. (Smalltalk at:#ConfigurationOfMagma) project latestVersion load: 'Server'; load: 'Client'. ... and I was presented with a backtrace. Since didn't know how to get a full backtrace out of Pharo in plain text, I took a screenshot: http://imagebin.org/180559 I know this is not adequate, but I'm hoping someone can help me get Pharo to give me information about this issue in a more convenient format. When I told Pharo to abandon loading the package and then re-evaluated this: (Smalltalk at:#ConfigurationOfMagma) project latestVersion load: 'Server'; load: 'Client'. ... then everything went just fine. I even tried creating a Magma repository, which worked. However, some things were totally borked in my Pharo image. I couldn't get the System Browser to do syntax highlighting, for one. I'm using Pharo1.3 + CogVM 13307 on Mac OS X Lion. I hope I made sense. Thanks. -- Ankur Sethi (GeneralMaximus on IRC and elsewhere)

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permutations / combinations implementation
by Tudor Girba Nov. 2, 2011

Nov. 2, 2011

Hi, Is there an implementation of permutations and combinations of a collection? Cheers, Doru -- www.tudorgirba.com "Presenting is storytelling."

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Exception style
by Jeff Gray Nov. 1, 2011

Nov. 1, 2011

I have just watched James Robertson's Exception screencast on exceptions in Pharo. I haven't really bothered with it previously as I have only played around and haven't done anything in anger. My commercial background in Java and C# has been with quite different styles of exception handling. Java was always cluttered with exception handling and re-throwing all through the code whereas in .net it was very much a 'let it bubble up to the container' approach. Although James screencast shows the mechanics of exceptions I'm wondering what is a normal exception handling strategy in Pharo? Obvoiusly tutorial code doesn't want to get bogged down with exceptions when trying to teach a specific aspect in smalltalk/pharo/oo etc but I'm yet to see tutorial example code that handles exceptions. -- View this message in context: http://forum.world.st/Exception-style-tp3962162p3962162.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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