- Pharo-dev - lists.pharo.org

Re: [Pharo-project] [Moose-dev] numerical method in smalltalk
by Serge Stinckwich March 22, 2012

March 22, 2012

Hi all, we talked recently on the moose mailing-list about having a more robust library for doing mathematical stuff in Smalltalk like SciPython or SciRuby (see below). If there is enough interested, i'm wondering if we could propose a Google Summer of Code project about that. I could write a draft for the project. Regards, On Mon, Mar 5, 2012 at 10:05 AM, Serge Stinckwich <serge.stinckwich(a)gmail.com> wrote: > On Sat, Mar 3, 2012 at 4:45 AM, StÃ©phane Ducasse > <Stephane.Ducasse(a)inria.fr> wrote: >> could be interesting to see if we need to some numerical analysis in moose and pharo. >> >> I will create a configuration >> >> >> MCSqueaksourceRepository >> Â Â Â Â location: 'http://squeaksource.com/DHBNumerical' >> Â Â Â Â user: '' >> Â Â Â Â password: '' > > Thank you. I'm definitively interested by having more mathematical > stuff available in Pharo. > There is Scipy [1] since a long time for Python and more recently Ruby > community do the same with SciRuby [2]. > > Some time ago, i wrote several random number generators [3] that might > be integrated in a numeral analysis packages. > > At the moment, i'm mostly interested by Runge-Kutta methods [4] in > order to solve some ordinary differential equations. > I already find some code on the web like this one: > http://live.exept.de/doc/online/english/programming/goody_stmath.html > > What is really important is to be able to test the result of such algorithms. > > [1] https://en.wikipedia.org/wiki/SciPy > [2] http://sciruby.com/ > [3] http://www.squeaksource.com/Random.html > [4] https://en.wikipedia.org/wiki/Runge%E2%80%93Kutta_methods > > Regards, > -- > Serge Stinckwich > UMI UMMISCO 209 (IRD/UPMC), Hanoi, Vietnam > Every DSL ends up being Smalltalk > http://doesnotunderstand.org/ -- Serge Stinckwich UMI UMMISCO 209 (IRD/UPMC), Hanoi, Vietnam Every DSL ends up being Smalltalk http://doesnotunderstand.org/

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[Pharo-project] Another GSoC idea: Esse,Â a framework for visualizing, storing and exploring ideas
by Dennis Schetinin March 22, 2012

March 22, 2012

I would like to propose another idea for GSoC. It is inspired by students I mentor in Tver State University and is a part of their current term project. Soâ¦ (A prototype of) "Esse", a framework for visualizing, storing and exploring ideas ----------------------------------------------------------------------------------------------------------- Level: Intermediate Possible mentor: Dennis Schetinin Possible second mentor: ??? Description Simply put, this is a framework for building presentations of a new generation. Somewhat similar to http://prezi.com, but even more advanced in perspective. The emphasis is on supporting thinking processes, saving, evolving, presenting and sharing ideas. Technical Details A possible result for the project can be described as follows: - an unbounded workspace that can be visualized and browsed with a camera metaphor (including panning, zooming, rotating operations) - set of conventional graphics primitives to build presentations (like text, boxes, pictures, arrows, etc.) - a capability to put any morph in the workspace - creating paths for camera, animations - tools to control presentation and change it "on-the-fly" Morphic seems to be the main subject of the project at the current stage. Benefits to the Student The student will learn Morphic, practice in building GUI applications/frameworks, improve Smalltalk programming skills. Benefits to the community - Morphic, GUI improvements - Unbounded workspace conception looks great as a basis for future development environment - Looking forward, popularize Smalltalk by presenting some benefits of its live object environment - â¦ Best regards, Dennis Schetinin Sent with Sparrow (http://www.sparrowmailapp.com/?sig)

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[Pharo-project] Pharo Dynamic play with Morphic UI Construction videos..
by S Krish March 22, 2012

March 22, 2012

Great fun playing with and building a moderately complex beginners UI. http://picasaweb.google.com/skrishnamachari/Pharo_Dynamic_UI Builds up over the 5 videos to move from simple forms to complex form and a runtime integration instantly... Borrowing from Bret Taylor's .. dynamic UI construction, not that jazz, but the overall feel is the same responsive just in time UI construction feedback cycle.. I guess time to rest my dirty hack hat, and don a professional one to deliver the promise of updated framework that does this, within the next week or two max...

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[Pharo-project] Alien callback thunk as ExternalAddress?
by Schwab,Wilhelm K March 22, 2012

March 22, 2012

I am getting near to jumping off the callback cliff. My problem is that I have a generated external structure that expects a void pointer (actually a function pointer). The setter sends #getHandle. I tried to hot-wire that by defining CallbackThunk>>getHandle to answer the #address. Is there a way to get an ExternalAddress that points to the thunk? Should I even be asking this question? :) Bill

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[Pharo-project] Pharo Kernel Reload Tests-Unix - Build # 27 - Still unstable!
by jenkins-pharo.ci.inria.fr＠jenkins-server.lille.inria.fr March 21, 2012

March 21, 2012

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[Pharo-project] Polymorph layout: images in a column
by Schwab,Wilhelm K March 21, 2012

March 21, 2012

Gary, If I create a column and place an alpha image in it, is there a way to get the image to scale, ideally to the width of the column? As it is, I'm setting fixed extents, but somewhat works against what I would like to leave to the column? Bill

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[Pharo-project] Fwd: Meeting Aliens (callbacks) in the debugger - was this risky?
by StÃ©phane Ducasse March 21, 2012

March 21, 2012

Begin forwarded message: > From: "Schwab,Wilhelm K" <bschwab(a)anest.ufl.edu> > Subject: FW: Meeting Aliens (callbacks) in the debugger - was this risky? > Date: March 21, 2012 1:57:16 AM GMT+01:00 > To: "stephane.ducasse(a)inria.fr" <stephane.ducasse(a)inria.fr> > > Stef, > > I am currently unable to post to the list (Outlook is being a pain) - could you forward this for me? I'm curious if I'm living dangerously or simply basking in Smalltalk's wonderful features. > > Bill > > > > > From: Schwab,Wilhelm K > Sent: Tuesday, March 20, 2012 8:55 PM > To: pharo-project(a)lists.gforge.inria.fr > Subject: Meeting Aliens (callbacks) in the debugger - was this risky? > > To see whether one can expect to set breakpoints in callback blocks, I gave it shot in #exampleCqsort: > > cb := Callback > signature: 'int (*)(const void *, const void *)' > block: [ :arg1 :arg2 | > self halt. > ((arg1 doubleAt: 1) - (arg2 doubleAt: 1)) sign > ]. > > I then ran the example. To my pleasant surprise/amazement, a walkback appeared and the debugger was functional; I was able to evaluate the accessors and get numbers. Is this dangerous in some way, or does it "just work?" It would be hugely helpful if it is safe. > > Bill > > > >

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[Pharo-project] Make arduino work on linux with cog vm
by Mariano Vicente March 21, 2012

March 21, 2012

Hi Everybody. I'm just started with Pharo, and Arduino. And i like to comunicate both. I instaled the package sent by Ricardo Moran in a Pharo 1.4 with the Cogvm from the Jenkins server, but i can't make the serials port works. The Arduino board, i have, is connected to usb, wich ubuntu detects as /dev/ttyACM0. I tried opening serial ports, like this: sp:=SerialPort new. sp openPort: '/dev/ttyACM0'. sp openPort: 'ttyACM0'. sp openPort: 'ACM0'. sp openPort: '/ttyACM0'. But all they fail with a error saying ""Cannot open..." After that, i have also, tried this: (1 to: 10000) select:[:port | [SerialPort new openPort:port;close. true] on:Error do: [false]] and had a empty collection. And also tried giving full permissions to the port and executed the vm sudoed... Are serial ports working on ubuntu?. Do i have to download a special vm?. (I would like to do a demo of arduino on monday, at work, and i would like to do in Pharo.) Cheers, Mariano

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[Pharo-project] Small polymorph suggestion
by Schwab,Wilhelm K March 21, 2012

March 21, 2012

Gary, I haven't figured out what they do yet, but I found #newSeparator, which creates a horizontal widget (name does not reflect this). Then I dug around and found #newVerticalSeparator. I suggest #newSeparatorHorizontal and #newSeparatorVertical, putting them together in the method list for easier discovery. Bill

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[Pharo-project] dead code?
by Guillermo Polito March 21, 2012

March 21, 2012

SmalltalkImage>>handleStartupErrors: is not implemented but sent by SmalltalkImage>>snapshot:andQuit: When did we lost it? :P Guille

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