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[ANN] Base62/Base36
by Norbert Hartl June 12, 2014

June 12, 2014

Just for the record. Iâve uploaded a package to smalltalkhub that contains util classes to en-/decode values into/from Base62/Base36. Base62/Base36 encode numbers in short strings. These are used e.g. by url shortener services from google, bit.ly etc. Base36 uses lowercase letters and numbers to encode, Base62 uses all characters from Base36 plus all uppercase letters. Base62 produces smaller strings while Base36 produces case insensitive ones. Example: Base62 fromNumber: 100000 -> 'q0Uâ Base36 fromNumber: 100000 -> â255s' FYI, Norbert

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Base64 encoding + UTF8 ?
by FranÃ§ois Stephany June 12, 2014

June 12, 2014

I might hit some problem with Base64 encoding in there. It seems that Pharo does not use UTF8 for its Base64 encoding. I'm probably missing something related to Base64 encoding... In Pharo 3.0: ZnBase64Encoder new encode: 'tamÃ¨reenslipdeguerre' asByteArray. -> 'dGFt6HJlZW5zbGlwZGVndWVycmU=' 'tamÃ¨reenslipdeguerre' base64Encoded. -> 'dGFt6HJlZW5zbGlwZGVndWVycmU=' In Ruby 2.0: Base64.strict_encode64("tamÃ¨reenslipdeguerre") -> dGFtw6hyZWVuc2xpcGRlZ3VlcnJl http://www.motobit.com/util/base64-decoder-encoder.asp (iso-8859-1) tamÃ¨reenslipdeguerre -> dGFt6HJlZW5zbGlwZGVndWVycmU= http://www.motobit.com/util/base64-decoder-encoder.asp (utf8) -tamÃ¨reenslipdeguerre > dGFtw6hyZWVuc2xpcGRlZ3VlcnJl

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CFP - IWST 2014 - Deadline Extension - June, 22
by jannik laval June 10, 2014

June 10, 2014

Dear smalltalkers, we decided to extend the deadline for submitting contributions to IWST. The new deadline is set to *22nd June, 2014*. ************************************************************ ************************************************ [Please accept our apologies if you receive multiple copies of this call] [Please send to interested colleagues / mailing-lists] ************************************************************************************************************ CALL FOR PAPERS IWST14 â International Workshop on Smalltalk Technologies Cambridge, England; August 19, 2014 http://www.esug.org/Conferences/2014/IWST14 ************************************************************************************************************ ------------------- Goals and scopes ------------------- The goals of the workshop is to create a forum around advances or experience in Smalltalk and to trigger discussions and exchanges of ideas. The topics of your paper can be on all aspect of Smalltalk, theoretical as well as practical. Participants are invited to submit research articles or industrial papers. This year we want to open two different tracks: one research track and one industrial track with less scientific constraints. We expect papers of three kinds: Short position papers describing emerging ideas Long research papers with deeper description of experiments and of research results. Industrial papers with presentation of real and innovative Smalltalk applications; this kind of paper should enlighten why Smalltalk is really appropriate for your application. We will not enforce any length restriction. -------------------- Important Dates -------------------- Submission deadline: June 15, 2014 Notification deadline: July 15, 2014 Workshop : August 19, 2014 All accepted papers will be published in ACM DL (To be confirmed) ------------------- Topics ------------------- We welcome contributions on all aspects, theoretical as well as practical, of Smalltalk related topics such as: Aspect-oriented programming, Design patterns, Experience reports, Frameworks, Implementation, new dialects or languages implemented in Smalltalk, Interaction with other languages, Meta-programming and Meta-modeling, Tools ------------------- Best Paper Award ------------------- To encourage the submission of high-quality papers, the IWST organizing committee is very proud to announce a Best Paper Award for this edition of IWST. We thank Lam Research Corporation for its financial contribution that makes it possible a price for the three best papers: 1000 USD for first place, 600 USD for second place and 400 USD for third place. The ranking will be decided by the program committee during the review process. The awards will be given during the ESUG conference social event. The Best Paper Award will take place only with a minimum of six submissions. Notice also that to be illegible, a paper must be presented at the workshop by one of the author and that the presenting author must be registered at the ESUG conference. ------------------- Publication ------------------- Both submissions and final papers must be prepared using the ACM SIGPLAN 10 point format. Templates for Word and LaTeX are available at http://www.acm.org/sigs/sigplan/authorInformation.htm. This site also contains links to useful informations on how to write effective submissions. ------------------- Submission ------------------- All submissions must be sent via easychair: https://www.easychair.org/conferences/?conf=iwst2014 ------------------- Program chairs ------------------- Alain Plantec (UMR 6265 Lab-STICC, University of Brest, France) Jannik Laval (Ecole des Mines de Douai, France) -- ~~Jannik Laval~~ Ãcole des Mines de Douai Enseignant-chercheur http://www.jannik-laval.eu http://www.phratch.com http://car.mines-douai.fr/

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How to encrypt a stream?
by Frank June 10, 2014

June 10, 2014

Hi folks, I need to encrypt a stream. I want to write a file like: StandardFileStream fileNamed: 'encryptedfile' do: [:str | str nextPutAll: 'string to be encrypted']. of course the file is in plain text :-) It would be wonderful if I can write something like: EncrypedFileStream fileNamed: 'encryptedfile' do: [:str | str nextPutAll: 'string to be encrypted'] using: 'AES' andPassword: '12345' Can you help me, please? Cheers Frank -- View this message in context: http://forum.world.st/How-to-encrypt-a-stream-tp4762022.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Grease 1.0.10 build on CI removed
by Stephan Eggermont June 10, 2014

June 10, 2014

I have removed the 1.0.10 version of Grease build on https://ci.inria.fr/pharo-contribution/job/Grease/ Please let me know if it needs to be fixed to work on Pharo 4. Pharo 2, 3 and 4 builds are green. Stephan

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Slots
by Bob Williams June 9, 2014

June 9, 2014

Camille and Marcus, thank you for your response. I thought something was missing, so the testing of Slots will be shelved for now; however, while it is in the planning stage, I would like to add some thoughts on targets and deliverable products (applications). I agree that most devices like the iPad and iPhone would not be suitable for development, they should be targets for application development and I would expand that list to include all devices, even micro-controllers. Look at the development process for the iPad and iPhone, the programming is done on a Mac using Xcode and testing is done first on the simulator running on the Mac and latter on the actual device. I find the Xcode environment inferior to Smalltalk's and by no stretch of the imagination is Objective-C a good substitute for Smalltalk. I think that development of application programs could be done far better with Smalltalk, provided that some tools were added to Smalltalk. Why not have the view, if it can be programmed in C then it can be programmed in Smalltalk. I think that the application process should be viewed as a series of steps culminating in the production of a product for sale or distribution: develop and test the program logic, test using constraints imposed by the target device, performance testing, test on the target device, and package for sale or distribution. A good examples of the second step where the constraints of the target is imposed are the word size and floating-point precision differences found in the target. If the development of the application is on a 64-bit computer then integer and floating-point calculated must be simulated for targets with smaller word size and for 32-bit floating-point or no floating-point processor. Implicit in those steps is the notion a gradual typing, the first uses the Smalltalk model to generically test the logic of the program, while the final step would require a fully compiled executable for some of the targets. I would argue that one reason that Smalltalk was not a commercial success was that you could not provide a fully compiled executable to the customer. The tools that the Smalltalk environment provides makes it a very productive application development environment, but of what use are they to the end user of the application, say a clerk or a business executive: why should any of the development tools be in the final product? It is clear that Slots will be used in the enforcement of typing at the instance variable level, but what about temporary variables? Can a compiler (machine not bytecode) be developed if temporary variables are not typed? Then there is the question of how to handle the elements of heterogeneous collections. I have more thoughts, but the above are related to Slots. Any comments? bw

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Pillar compile.sh
by Ben Coman June 8, 2014

June 8, 2014

Hi all, ./compile.sh can be passed a parameter to compile only a specific file rather than the whole book. Now I consider this probably only occurs during development with a human executing the script (rather than some CI process which will be processing the whole book) and I'm finding it useful to automatically fire off a PDF Viewer on the generated file, as per the line below tagged "ADDED". if [[ $# -eq 1 ]]; then dir=$(dirname "$1") # e.g., Zinc pier_file=$(basename "$1") # e.g., Zinc.pier pillar_one "$1" produce_pdf "${dir}" "${pier_file}" open "${dir}"/"${pier_file}".pdf # <----ADDED else pillar_all compile_chapters compile_latex_book fi Is this something others would find useful? or can you see issues with it? Having this mod makes my working area dirty, and 'git clean' blows it away - so I'd like to integrate something like it. Now the above works for me on OSX, but for flexibility to deal with other platforms, the "open" command could be replaced with an environment variable, and do nothing if environment variable does not exist. What do you think? cheers -ben

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Slots
by Bob Williams June 8, 2014

June 8, 2014

I am trying to duplicate the typed slot example in the paper "Flexible Object Layout". I did create the classes for TypedSlot and FloatSlot, but I am trying to find the best way to set the type for class FloatSlot to the class Float. In the example in the paper it appears to be set at the time the class is created however that does not seem to be an option when using PharoClassInstaller. I was thinking about using some form of lazy initialization, but is there a better way; a method anticipated by the Pharo 3 designers? I used: PharoClassInstaller make: [ :aSCB | aSCB superclass: Slot; name: #TypedSlot; slots: #(type); category: 'BW-Testing' ]. PharoClassInstaller make: [ :aSCB | aSCB superclass: TypedSlot; name: #FloatSlot; category: 'BW-Testing' ]. bw

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[ANN] Generating beautiful html books from Pillar
by Damien Cassou June 7, 2014

June 7, 2014

Nicolas Petton and I are proud to announce the possibility to create really nice HTML books from Pillar (I must thank https://github.com/GitbookIO/gitbook as well). The first book to get this nice layout is the Pillar documentation: http://damiencassou.gitbooks.io/pillar/introduction.pier.html -- Damien Cassou http://damiencassou.seasidehosting.st "Success is the ability to go from one failure to another without losing enthusiasm." Winston Churchill

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Slowness question
by Hilaire Fernandes June 7, 2014

June 7, 2014

Hi, Programmed sketch in DrGeo can be animated, for example like the script bellow. The "canvas do:" message forks the block so user is not blocked. At #udpate message the items and views (morph) are recomputed and refreshed . Before porting DrGeo to Athens, the animation was pretty fast, now it is very slow. Any idea from where it could come from? Thanks ---8<------ |canvas s stats points| points :=Array new: 12. stats := Array new: 12 withAll: 0. canvas := DrGeoCanvas new. 2 to: 12 do: [:i | points at: i put: (canvas point: i(a)0.1) (points at: i) square; color: Color blue. s := canvas segment: i@0 to: (points at: i). s color: Color red]. canvas do: [ 1 to: 10000 do: [:i| s := 6 atRandom + 6 atRandom. stats at: s put: ((stats at: s)+1). (points at: s) name: (stats at: s) asString; moveTo: s @ ((stats at: s) / 100). canvas update]. ---8<------ -- Dr. Geo http://drgeo.eu

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