November 2012 - Pharo-users

funny idea Symbol vs. Selector
by stephane ducasse May 14, 2015

May 14, 2015

Hi guys I'm thinking aloud... I was wondering if we could not take advantage of a new class: Selector. MethodDict would only contain selectors and not symbols. I remember that I talked about that with hernan. Stef

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Postmark email library
by Francois Stephany Aug. 31, 2013

Aug. 31, 2013

Hi guys, I've made a simple wrapper around the Postmark API. It lets you send emails without dealing with a SMTP server. You can read about it here: http://developer.postmarkapp.com/developer-libs.html http://developer.postmarkapp.com/developer-build.html and there: http://articles.tulipemoutarde.be/send-email-from-pharo-with-postmark It's pretty simple and naive implementation but it gets the job done. I'll add email attachements when I will need it. Francois

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Package browser?
by Rob Vens June 28, 2013

June 28, 2013

I am attempting to do the Pharo by Example book, but a package browser (which is used in the examples) is not in the 1.1.1 or 1.2 image. Should I still use categories? If I create a package in Monticello browser I am not able to add classes or anything (not as far as I could see). Just starting out using Pharo, so apologies if these questions are already answered elsewhere.

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Adding OAuth & OpenID support to Pharo
by Andy Burnett Dec. 20, 2012

Dec. 20, 2012

Hello, Now that we have added Websocket support to Zinc, I would like to move forward and add OAuth & OpenID. Sven Van Caekenberghe, and Jan van de Sandt, have put together a proposal, which my company would like to fund. If anyone feels that they would benefit from this - commercially - and would be happy to make a contribution to the development costs, please shoot me an email. All contributions are gratefully received. Cheers Andy

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Pharo Association
by Marcus Denker Dec. 3, 2012

Dec. 3, 2012

Hello, We are happy to announce the Pharo User Association: http://association.pharo.org The goal of the Pharo User Association is to support Pharo development and promotion. There are two individual memberships - Individual Pharo Association Member: Yearly fee 40 Euros - Golden Individual Pharo Association Member: Yearly fee 99 Euros You will get - reduction access to pharo conferences, - reduction for training and access to teaching material, - be part of the pharoAssociation-individual-members mailing-list, - an account at the pharo association web site. This Association is complementary to the Pharo consortium managed by INRIA. The Consortium is for entities such as companies, research teams, or institutes. For more information, see: http://www.pharo-project.org/community/consortium The funds collected by the Association will be used in coordination with the Consortium to support the development of Pharo. The Pharo Board and Pharo Core Team.

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Better replacement for EntryFieldMorph in pharo1.4
by irfankhan1 Nov. 29, 2012

Nov. 29, 2012

Hi i want to know which class would be a better option i can use in pharo 1.4 in order to display and update text as class EntryFieldMorph is no more. -- View this message in context: http://forum.world.st/Better-replacement-for-EntryFieldMorph-in-pharo1-4-tp… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Connecting to a C++ dll
by Shanu Kalra Nov. 28, 2012

Nov. 28, 2012

Hi, I am new to smalltalk and I have just started using Pharo. I am trying to read a C++ function from a dll and then display output in pharo. I tried using FFI , but I am unable to implement it in this scenario. Can anyone please help me with this? Regards Shanu

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VAST-style Compile-time constants
by Bob Hartwig Nov. 27, 2012

Nov. 27, 2012

Hi all, I'm investigating the feasibility of porting a large VAST application to Pharo, so I may have some questions in the coming days. Here's my first question: VAST has the concept of compile-time constants, using the ##() syntax. Whatever is in the parentheses is evaluated at compile time, and the result is stored, so the evaluation does not need to happen again when the method is sent later. E.g., when this method is sent: printTheNumberToTheTranscript Transcript nextPutAll: ##( 10 factorial asString ) . no calculation or string conversion is necessary, because 10 factorial asString was evaluated at compile time and the answer was stored. Please note that this is different from array literals, which is how Pharo seems to treat this syntax. As far as I can tell, Pharo does not have this feature (certainly not with that syntax), but I would love to be proved wrong. Am I? Does anyone else have words of wisdom regarding porting a VAST app to Pharo? Any other language features that are missing? I'm not too concerned about Pragmas, and this app has no GUI, so I'm not concerned about UI framework differences. Thanks, Bob Hartwig

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CollectionExtensions missing in Pharo 2.0
by Usman Bhatti Nov. 23, 2012

Nov. 23, 2012

Hello all, I remarked that the package CollectionExtensions is missing in Pharo 2.0. We are using a useful method provided by the package on strings that provides character intervals for line numbers in a string. Here is the code from 1.4: intervalOfLine: aLineNumber "Answer an interval spanning between the first and the last character of the line from aLineNumber" | lineIndex | lineIndex := 0. self lineIndicesDo: [ :start :endWithoutDelimiters :end | lineIndex := lineIndex + 1. lineIndex = aLineNumber ifTrue: [ ^ start to: end ] ]. ^ 0 to: 0 Now, this method is missing in Pharo 2.0. Is there a particular reason for omitting the package? Is there a replacement for the pckage? tx, Usman

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FileTree queries
by Chris Nov. 21, 2012

Nov. 21, 2012

Hi, I've just migrated to using FileTree with SVN and am wondering if it is possible to use it without the monticello.meta? You obviously get a lot of merge conflicts with these and the version file in particular, and I didn't really see much benefit when using SVN for commit comments and revision histories and so forth so have just been ignoring / deleting them. It seems to work ok for the most part and by loading packages with Gofer, but I feel like I'm fighting the system a bit and have not had much luck with Metacello in particular which I would like to get working again. Can anyone advise? Thanks Chris

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Halo handle text missing?
by adrians-2 Nov. 21, 2012

Nov. 21, 2012

I'm using the latest 2.x one-click and I noticed that the halo text for the handles is missing. All I get is "unknown halo handle" for any handle I hover over. Is this a known issue with the latest updates? -Adrian -- View this message in context: http://forum.world.st/Halo-handle-text-missing-tp4655981.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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FileTree queries
by Chris Nov. 20, 2012

Nov. 20, 2012

Hi, I've just migrated to using FileTree with SVN and am wondering if it is possible to use it without the monticello.meta? You obviously get a lot of merge conflicts with these and the version file in particular, and I didn't really see much benefit when using SVN for commit comments and revision histories and so forth so have just been ignoring / deleting them. It seems to work ok for the most part and by loading packages with Gofer, but I feel like I'm fighting the system a bit and have not had much luck with Metacello in particular which I would like to get working again. Can anyone advise? Thanks Chris

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fOSSa 2012
by Marcus Denker Nov. 19, 2012

Nov. 19, 2012

Pharo will participate to the fourth edition of the fOSSa Conference taking place from December 4 to 6, 2012 in Lille (France). The aim of the fOSSa (Free Open Source Academia Conference) is to reaffirm the underlying values of Open Source software: innovation & research in software development. While the first edition aimed at providing valuable information on the Open Source model at large, the second edition focused specific key-aspects of FOSS such as tech innovation,upcoming issues & challenges in the open development context and how open activities, collaboration and knowledge sharing is beneficial to academia, education & industry. The third edition look at the future of Open Source (Eco system, Trends, new territories, etc). The fourth edition will address in an open-minded style about: - Digital Geographic Strategies & the Native Generation, - FLOSS History with the movie: "Revolution OSâ followed by a debate, - Open Art, collaboration between art & science, - Licenses in the real life: no lawyers speeches, only facts & return experience, - Workshops to learn how to develop code for debian, gnome, apache, robotics ROS ... And, of course the usual fOSSa topics (Education & Community management). There will be a Pharo Workshop Dec 5th. "What marks the difference between fOSSa and other events is the air that you breath there. An event organized by passionate people, with passionate attendees as well â¦ and great speakers. Every year you can get some presentations of greater international events in advance (I remember the year of Arduino, to give you an example).â -- Gabriele Ruffatti -- SpagoWorld Blog 2012. fOSSa days are open to everyone and registration is free ! more information @ http://fossa.inria.fr -- Marcus Denker -- http://marcusdenker.de

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Constrained Morph dragging
by Sebastian Nozzi Nov. 18, 2012

Nov. 18, 2012

Hello Morphic experts, I am learning / experimenting with Morphic and have the following question: "How do I constrain the movement of a dragged Morph?" As illustrated here: http://jqueryui.com/draggable/#constrain-movement (e.g. constrain within axis/container) So far the "hack" I came up with was to aggresively re-position the dragged Morph in its "drawOn:", if it is attached to a HandMorph: drawOn: aCanvas self owner isHandMorph "is there a better way to ask: am I being dragged?" ifTrue: [ self position: (self position x) @ 400 ]. super drawOn: aCanvas. I am sure this solution is pretty bad... I also get visual artifacts when I move the mouse up/down. Are there better ways/hooks for this? Generally: is there a method that is called on submorphs whenever the parent Morph was re-positioned/re-sized? Thanks in advance! Sebastian

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LZ4 Compressor binding for Pharo
by Mariano Martinez Peck Nov. 16, 2012

Nov. 16, 2012

Hi guys. I wrote a Pharo binding for the LZ4 compressor. If you are interested read here: http://marianopeck.wordpress.com/2012/11/16/lz4-binding-for-pharo/ And here: http://smalltalkhub.com/#!/~marianopeck/LZ4/ Cheers, -- Mariano http://marianopeck.wordpress.com

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Pharo consortium final document
by StÃ©phane Ducasse Nov. 14, 2012

Nov. 14, 2012

Dear Pharoers this is the latest and final version of the consortium agreement. Now you can fill it sign it and send it to us at INRIA. S Ducasse - Pharo Consortium 40, avenue Halley, Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza, Villeneuve d'Ascq, FR-59650, France. Thanks! Stef ------------------------ Dr. StÃ©phane Ducasse -- Directeur de Recherche (Senior Researcher) INRIA - USTL - CNRS UMR 8022 stephane.ducasse(a)inria.fr http://stephane.ducasse.free.fr http://rmod.lille.inria.fr/ **NEW ***Tel 00 33 (0)3 59 35 87 52 - Fax 33 3 59 57 78 50

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CategorySaver
by Sebastian Nozzi Nov. 12, 2012

Nov. 12, 2012

Dear Pharo Community, I would like to share with you the work of my past weekend, and announce "CategorySaver". It is a simple utility to periodically save (file-out) a list of categories given (wildcards accepted). You can find it here: http://smalltalkhub.com/#!/~sebnozzi/CategorySaver And invoke it like this: CategorySaverPanel new openInWorld What motivated me to do this was loosing hours of work after image "hang-ups", without having saved before. In those cases I thought that it would be cool to have some kind of background process, that at least saved some recent version of the code I was working on. But only now I got myself to write it. Hopefully you are not like me, you know what you are doing, the VM never hangs on you, and don't need this utility ;-) For all others I hope you might find it helpful. Best regards, Sebastian P.S. I am kind of a Smalltlak newbie. So if you find things to improve in the code, I am glad about any tip / critique. P.S. 2 -- I was amazed at how easy it was to code the UI! UI programming in Squeak/Pharo was always an area where I thought must be incredible complicated, but thanks to UITheme's builder (Polymorph?) it's a breeze. Good work! P.S. 3 -- Did I have to manually add [ANN] to the subject? My apologies in this case. Also my apologies if this kind of mails correspond to only one of the lists.

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New MongoTalk Repo
by Francois Stephany Nov. 11, 2012

Nov. 11, 2012

I've moved the MongoTalk project to SmalltalkHub: http://www.smalltalkhub.com/#!/~francois/MongoTalk/ The original repo is still available but please use the new one. I don't know how to put a repo in global read/write on Smalltalkhub (is it possible?)

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Global package cache
by Francois Stephany Nov. 11, 2012

Nov. 11, 2012

In an 1.4 summer image, executing: > MCCacheRepository default: (FileDirectory on: '/Users/fstephany/package-cache/'). in a workspace works fine. But: > StartupLoader default executeAtomicItems: { > StartupAction name: 'Global Monticello package-cache' code: [ > MCCacheRepository default: (FileDirectory on: '/Users/fstephany/package-cache/')]. > ... other StartupAction }. doesn't. The other StartupActions are executed fine (meaning that StartupLoader works). Is there something reseting the package-cache at startup?

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Nov. 10, 2012

Dear Pharoers Here is the result of the work we did around the consortium for Pharo for about 2 years. We took into account all your remarks over the years and we think that the result is good and corresponds to what the community can support. This consortium is important for Pharo's future and it will help us to deliver a system to help you making business. Our goal is to be able to collect fundings to pay at least one full time engineer. The idea is that all the consortium members will sign the same agreement. We will not handle modifications per partners. Now since we are starting the process if you spot some glitches on the form let us know. We can discuss and fully stabilize one version. We suggest to read the document. - If you agree to sign it and send it to us (in two copies if you do it by surface mail at INRIA - S. Ducasse - Pharo, 40, avenue Halley, Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza, Villeneuve d'Ascq, FR-59650, France.), so that we sign it too. - Don't forget to complete your legal mention on first page and your contact details on article 14 before signing. :) We will launch soon two web sites: - one for the Pharo user association and - one for the Pharo consortium. A side note: we will communicate about it later and separately but Inria decided to support the consortium by paying one extra year to Igor Stasenko. This is around 60 Keuros in addition to the year of Esteban Lorenzano and previous years of Igor. I really want to thank Inria for the constant support and the work of S. Karpf, P. Moreau and S. Perin. Stef ------------------------ Dr. StÃ©phane Ducasse -- Directeur de Recherche (Senior Researcher) INRIA - USTL - CNRS UMR 8022 stephane.ducasse(a)inria.fr http://stephane.ducasse.free.fr http://rmod.lille.inria.fr/ **NEW ***Tel 00 33 (0)3 59 35 87 52 - Fax 33 3 59 57 78 50 40, avenue Halley, Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza, Villeneuve d'Ascq, FR-59650, France.

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Recovering Changes from a broken image
by Sven Van Caekenberghe Nov. 8, 2012

Nov. 8, 2012

Hi, One of the cool things of Smalltalk's images/changes file is that you can do a World Menu > Tools > Recover lost changesâ¦ to get back most [1] of your code in case your image/OS/machine suddenly crashed or you forgot to save your image or commit your Monticello packages. But we all have encountered the situation where the image is broken, saved in such a state that it no longer starts up properly. In that case your code might seem lost forever. No, it is not ! Two days ago I had this problem myself and I remembered something Marcus said some time ago: you can access the changes file of one (in casu your broken image) from another (working) image to select/recover the changes you want. It worked perfectly. The easiest procedure it to copy the .changes file from the broken image and rename its extension to .cs and then open it from a World Menu > Tools > File Browser and open a Changes browser on it. I found this very useful. This is a really important technique to be aware of. Sven [1] Sadly, not everything is logged in the changes file: creation of new classes, method deletions are not recorded. -- Sven Van Caekenberghe http://stfx.eu Smalltalk is the Red Pill

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stream usage in workspace
by Ben Coman Nov. 5, 2012

Nov. 5, 2012

I am refereshing my familiarity with streams by looking at PharoByExample1 which says... "You have to remember that each time you open a stream on a ï¬le, you have to close it too." Does that mean if in Workspace I iteratively develop some code to process a stream, so that I am continually running... myStream := FileStream readOnlyFileNamed: 'C:\test.txt. ...so that 'myStream' is overwritten each time such that I lose reference to the previous stream, and I am no longer able to send #close to it, am I creating a memory leak in my image ? My prior assumption has been that once 'myStream' drops the reference drops to the previous stream, garbage collection would take care of 'everything'. cheers -ben

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secure sockets https in Zinc
by Cameron Sanders Nov. 3, 2012

Nov. 3, 2012

In the method... ZnNetworkingUtils >> streamClassForScheme: scheme scheme = #http ifTrue: [ ^ self socketStreamClass ]. scheme = #https ifTrue: [ ^ self secureSocketStreamClass ifNil: [ self error: 'No secure socket stream class set or available' ] ]. (ZnUnknownScheme scheme: scheme) signal I am getting the error indicating the lack fo secureSocketStreamClass. The initialize and lazy-initialization try to use ZdcSecureSocketStream, but that is not found. I am using Pharo 1.4 (downloaded & configured last summer) with Pier3 loaded, along with Zinc-HTTP (SvenVanCaekenberghe.280), Zinc-Path-HTTPSocket (StephaneDucasse.2) and Zinc-Seaside (SvenVanCaekenberghe.22). I see numerous updates to those and various other new packages. I believe what I have was pulled in by the following last summer: Gofer new squeaksource: 'MetacelloRepository'; package: 'ConfigurationOfPier3'; load. (Smalltalk at: #ConfigurationOfPier3) load. Gofer it squeaksource: 'MetacelloRepository'; package: 'ConfigurationOfPier3AddOns'; load. (Smalltalk at: #ConfigurationOfPier3AddOns) load. - What is the recommended update approach for me, by those *in the know*? Thanks in advance, Cam

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Gettext in Pharo 1.4
by Chris Nov. 3, 2012

Nov. 3, 2012

Hi All, Is anyone maintaining the above package? I had a few issues when trying to use it in Pharo 1.4 Summer but have done a few fixes and it is now working well for me; would like to run them by someone who knows a bit more about it first. Thanks Chris

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Acquiring lock, releasing in callback
by Sebastian Nozzi Nov. 2, 2012

Nov. 2, 2012

Hello Dear Pharo users, threads and co. are giving me headaches :-) I wanted to ask for advice... What do I use in Pharo to prevent more than one thread entering a region, but "releasing" the exclusivity in another block/callback? For example, let's suppose there is an hypothetical class "Lock" that does that. lock acquire. longOperation performWhenFinished: [ callback code ... lock release ]. ... rest of the program ... Is there something like that? Or do I have to simulate it with something else? (Semaphore?) I am aware or Monitor/Mutex critical:, but I am not sure I can use it in my case. Thanks in advance, Sebastian

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