- Pharo-users - lists.pharo.org

GSOC 2016

by Serge Stinckwich

Dear pharoers, this year Pharo consortium (and community) is going to take part in the Google Summer of Code event[1] as a standalone organization. This is an opportunity to promote Pharo, get some job done and have students paid. Currently we are at the most important stage as we are preparing the organization application, and hoping that we will be accepted and granted decent amount of project slots. Everyone can help with application by submitting ideas for student projects. I reuse the list of the last year : https://github.com/pharo-project/pharo-project-proposals/blob/master/Topics… It is in STON format, and result is being generated at: http://gsoc.pharo.org/ Please add (or update) your ideas following the format of existing projects and open a pull request with them (you will need a github account). Preferably submit ideas with possible mentors, but if none are available at the moment ideas without mentors are also welcome. The template to submit projects is : PharoTopic new title: 'The name of your project; contact: 'email address'; supervisors: 'Supervisors names'; keywords: 'keywords separated by spaces; context: 'a description of the context of the project'; goal: 'description of the goal'; level: 'Beginner or Intermediate or Advanced'; yourself. We will need a lot of projects/idea before February 19th 2016, the deadline for applying to GSOC 2016. Do not hesitate to ask me questions. If you don't know how to edit the list, please send your project description following the template to me. [1] https://summerofcode.withgoogle.com/ Regards, -- Serge Stinckwich UCBN & UMI UMMISCO 209 (IRD/UPMC) Every DSL ends up being Smalltalk http://www.doesnotunderstand.org/

Feb. 11, 2016

Dr. Geo on gravity

by Hilaire

A nice article about a gravity simulation designed with Dr. Geo. Written by a college teacher. http://blog.drgeo.eu/post/2016/Drawing-the-Parabolic-Trajectory-of-an-Objec… Hilaire -- Dr. Geo http://drgeo.eu

Feb. 11, 2016

Re: Huge image

by Davide Varvello

I don't know why my original message isn't accepted by the list, but it's on forum: http://forum.world.st/Huge-image-td4876854.html Anyway, thanks Dale, I'm going to try your suggestion. Davide Dale Henrichs-3 wrote > David, > > I don't have a direct solution, but I have been playing with an analysis > technique for solving this particular type of problem: scads of Strings > and a need to "make sense of the reference graph". > > If you look at this example[1], you'll see that there are 202K instances > of String (this example is from a GemStone db). the nodes pointing to > the String node, show that of the 202K strings, there are 70K instances > of Array referencing one or more of the 202k strings; 47K instances of > MCVersionInfo and 43K MethodVersionRecord instances. > > I've found that this approach can help you understand why you have so > many strings ... > > The basic technique is to gather the instances of String, then for each > instance of string, gather the collection of objects that reference the > String instance and summarize the reference by class instance count and > keep an IdentitySet of the instances referencing Strings by class so > that you can build the next level of references .... > > For GemStone, this information is displayed using Roassal2 and the > calculations are done by scanning a backup of the repository... > > You could probably brute force calculate this in Pharo (be sure to > isolate the objects that you are using in your analysis from the set of > objects being analyzed otherwise things get out of control ... > > HTH, > > Dale > > > [1] > https://github.com/dalehenrich/obex#class-instance-counts-based-on-selected… -- View this message in context: http://forum.world.st/Huge-image-tp4876855p4876977.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Feb. 11, 2016

Re: [Pharo-users] [Bulk] smalltalk banner or poster for FOSSASIA conference.

by Offray Vladimir Luna CÃ¡rdenas

Hi, On 10/02/16 00:46, Martin BÃ¤hr wrote: > Excerpts from HernÃ¡n Morales Durand's message of 2016-02-09 22:39:56 +0100: >> Last year there was a poster made by Adam adam(a)234.cz >> I don't know if that fits your goals, the poster license or if he's still >> around, maybe you could check with him if there's an update. > that one was my first thought actually: > https://github.com/AdamSadovsky/pharo-family > > it is a bit dense for a banner though, as people won't usually get close to it > to read. > > greetings, martin. > I agreed. It gives a good panoramic overview of the Pharo ecosystem with a thematic approach. Cheers, Offray

Feb. 10, 2016

Re: [Pharo-users] RÃ©p: How to display Dictionary using TreeModel

by Ð¥ÑÐ¸ÑÑÐ¸Ð½Ð° ÐÐ¸ÑÐ°Ð¹Ð»ÑÐº

Thank you very much =) 2016-02-09 23:45 GMT+02:00 julien <julien(a)tamere.eu>: > Hi, try something like: > > tm := TreeModel new. > tm roots: yourCollection. > tm hasChildrenBlock: [ :item | item isDictionnary ]. > tm childrenBlock: [ :item | item keysAndValues ]. > > I wrote that from my phone but I think it is working. Else it shows you > the idea :) > > Julien > > Khrystyna Mykhailiuk <chrismihaylyk(a)gmail.com> a Ã©crit : > > >Hi, all! > > > >I have OrderedCollection of Dictionaries and I want to display content of > >each Dictionary using TreeModel. > >I wrote these code, but it doesn't work correctly. And I get some errors. > > > >mt := TreeModel new. > >mt roots: (collectionFirst select: OrderedCollection new); > >childrenBlock: [ :item | item ]. > >mt openWithSpec. > > > >(This is screenshot of my work) > ><http://forum.world.st/file/n4876653/ScreenPharoTreeModel.png> > > > >I need to show each pair of Dictionary in new node. > > > >Can you help me, please? > > > > > > > >-- > >View this message in context: > http://forum.world.st/How-to-display-Dictionary-using-TreeModel-tp4876653.h… > >Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > > >

Feb. 10, 2016

Re: [Pharo-users] Huge image

by Dale Henrichs

David, I don't have a direct solution, but I have been playing with an analysis technique for solving this particular type of problem: scads of Strings and a need to "make sense of the reference graph". If you look at this example[1], you'll see that there are 202K instances of String (this example is from a GemStone db). the nodes pointing to the String node, show that of the 202K strings, there are 70K instances of Array referencing one or more of the 202k strings; 47K instances of MCVersionInfo and 43K MethodVersionRecord instances. I've found that this approach can help you understand why you have so many strings ... The basic technique is to gather the instances of String, then for each instance of string, gather the collection of objects that reference the String instance and summarize the reference by class instance count and keep an IdentitySet of the instances referencing Strings by class so that you can build the next level of references .... For GemStone, this information is displayed using Roassal2 and the calculations are done by scanning a backup of the repository... You could probably brute force calculate this in Pharo (be sure to isolate the objects that you are using in your analysis from the set of objects being analyzed otherwise things get out of control ... HTH, Dale [1] https://github.com/dalehenrich/obex#class-instance-counts-based-on-selected…

Feb. 10, 2016

Huge image

by Davide Varvello

Guys, I've a bloated image and I don't know why it's so huge and how to shrink it. It happened that my image has grown from 50MB to 440MB in a morning. I've already followed these suggestions https://github.com/pharo-project/pharo-core/wiki/Memory-Hogs and flushing monticello repos the image reduced itself to 219MB, better. Anyway I don't know how to reduce it more. Evaluating: SmalltalkImage current reportCPUandRAM I found you can see ByteStrings occupy 85.5% of space! I tried to inspect instances of ByteString, but I can't find anything worth of. If I Open pointers to the instance I find references to GLMPanePort, GLMPane and NodeModel (see attached png) I'm on Pharo 4 TIA Davide <http://forum.world.st/file/n4876854/huge_image.png> -- View this message in context: http://forum.world.st/Huge-image-tp4876854.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Feb. 10, 2016

Re: [Pharo-users] Spec #focusOrder

by Julien Delplanque

On 10/02/16 14:09, Julien Delplanque wrote: > > > On 10/02/16 14:00, Nicolai Hess wrote: >> 2016-02-10 13:15 GMT+01:00 Julien Delplanque <julien(a)tamere.eu>: >> >>> >>> On 10/02/16 12:48, Nicolai Hess wrote: >>> >>>> 2016-02-10 12:20 GMT+01:00 Julien Delplanque <julien(a)tamere.eu>: >>>> >>>> Hi, >>>>> I am trying to manage the focus order of my widget that uses >>>>> sub-widgets >>>>> with their #focusOrder defined. >>>>> >>>>> How do spec manage nested focus order? I see in the implementation >>>>> that >>>>> it >>>>> is simply an OrderedCollection. >>>>> >>>>> I does not behave as I expected, when I add my sub-widgets to the >>>>> focus >>>>> order, the focus is given to the first sub-widget and I can not >>>>> access >>>>> the >>>>> second sub-widget using tabulation. >>>>> >>>>> For example lets imagine WidgetA contains 2 buttons and WidgetB >>>>> contains >>>>> 2 >>>>> buttons. I can only access the two buttons of WidgetA using >>>>> tabulation. >>>>> >>>>> How can I deal with that? >>>>> >>>>> Thanks in advance, >>>>> >>>>> Hi Julien, >>>> how are WidgetA and WidgetB connected ? Are they both (spec)-models >>>> used >>>> by >>>> another main model ? >>>> >>>> Hi Nicolai, >>> Yes they are subclasses of ComposableModel used by another main model. >>> >> Ok, so, if your main model has instance variables for widgetA and >> widgetB, >> can you add this in the method where you instantiate WidgetA and >> WidgetB: >> >> widgetA focusOrder add: widgetB. >> widgetB focusOrder add: widgetA. >> > Oh ok, I will try that. I was adding widgetA and widgetB to the > focusOrder of my main widget :/... > > Thanks, > > Julien > When I use your method, I have the good behavior when going to the next sub-widget using tabulation but I have a strange behavior when going to the previous widget. If I take the same example with widgetA and widgetB, when trying to reach previous sub-widgets with the focus, I can only access the first button of each sub-widget is it normal? How can I fix this? Thanks in advance, Julien

Feb. 10, 2016

Re: [Pharo-users] How to generate "Content-Type: application/octet-stream" with Zinc client

by Sven Van Caekenberghe

>From your netcat output I inferred that you wanted two content-type headers, but I don't think you do, I guess you just want to control the content-type. When creating a ZnPart based on a file, the content-type is inferred automatically from the filename's extension. The simplest solution is to use an unknown file type, like .bin or .dat which will result in a content-type of application/octet-stream (the default). ZnMimePart fieldName: 'file' fileNamed: '/tmp/foo.bin'. You could try setting the content-type after creation. | part | part := ZnMimePart fieldName: 'file' fileNamed: '/tmp/foo.txt'. part headers contentType: ZnMimeType default. part. The methods #setContentType: could be added to ZnMimePart, I guess. > On 10 Feb 2016, at 13:42, chicoary <chicoary(a)gmail.com> wrote: > > Thanks Sven for your reply. > > The curl I want reproduce with Zinc is: > > curl 'http://localhost:5001/api/v0/add?stream-channels=true' \ > -H 'content-type: multipart/form-data; > boundary=a831rwxi1a3gzaorw1w2z49dlsor' \ > -H 'Connection: keep-alive' \ > --data-binary $'--a831rwxi1a3gzaorw1w2z49dlsor\r\nContent-Type: > application/octet-stream\r\nContent-Disposition: file; name="file"; > filename="file.txt"\r\n\r\nfile.txt > contents--a831rwxi1a3gzaorw1w2z49dlsor--' --compressed > > It is like an example in https://github.com/ipfs/js-ipfs-api#tooling. > > I want to implement the ipfs add command in my project > http://smalltalkhub.com/#!/~chicoary/SmallIPFS/. > > > > > > ----- > http://chicoary@gmail.com > -- > View this message in context: http://forum.world.st/How-to-generate-Content-Type-application-octet-stream… > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. >

Feb. 10, 2016

Re: [Pharo-users] How to generate "Content-Type: application/octet-stream" with Zinc client

by Robert Kuszinger

OK. I'm an idiot. This is server code, so, another business.... Robert Kuszinger <kuszinger(a)giscom.hu> ezt Ãrta (idÅpont: 2016. febr. 10., Sze, 14:15): > Hello! > > Here is a code snippet: > > > At the trivial pÃ¼lace you can set whatever mime type yout think will work > for you. > I hope this helps. > > Robert > -------------------------------------------------------------- > > > sendFile > > |contents stream | > > stream := FileStream readOnlyFileNamed: self file. > stream binary. > contents := stream contents. > stream close. > > self requestContext respond: [ :response | > response > *contentType: 'application/x-msdownload';* > document: contents; > attachmentWithFileName: self fileName > ]. > > > > > chicoary <chicoary(a)gmail.com> ezt Ãrta (idÅpont: 2016. febr. 10., Sze, > 14:08): > >> Thanks Sven for your reply. >> >> The curl I want reproduce with Zinc is: >> >> curl 'http://localhost:5001/api/v0/add?stream-channels=true' \ >> -H 'content-type: multipart/form-data; >> boundary=a831rwxi1a3gzaorw1w2z49dlsor' \ >> -H 'Connection: keep-alive' \ >> --data-binary $'--a831rwxi1a3gzaorw1w2z49dlsor\r\nContent-Type: >> application/octet-stream\r\nContent-Disposition: file; name="file"; >> filename="file.txt"\r\n\r\nfile.txt >> contents--a831rwxi1a3gzaorw1w2z49dlsor--' --compressed >> >> It is like an example in https://github.com/ipfs/js-ipfs-api#tooling. >> >> I want to implement the ipfs add command in my project >> http://smalltalkhub.com/#!/~chicoary/SmallIPFS/. >> >> >> >> >> >> ----- >> http://chicoary@gmail.com >> -- >> View this message in context: >> http://forum.world.st/How-to-generate-Content-Type-application-octet-stream… >> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. >> >>

Feb. 10, 2016