Planet Smalltalk

April 23, 2015

Smalltalk Jobs - Smalltalk Jobs – 4/22/15

  • Richardson, TXSoftware Engineer Equipment Control through Rudolph Technologies
    • Required Skills:
      • BS degree in Computer Science or Computer Engineering required
      • 0-5 years’ of software development experience.
      • Understanding of hardware interface and controls
      • Strong Object Oriented development skills required.
      • Strong ability to learn quickly and work with a distributed core software team.
      • Knowledgeable of software development concepts, practices and procedures.
      • Willing to travel ~10% of time at customer locations in Asia in support of software releases.
      • Professional attitude and the ability to work across many levels of the organization including Management, Technical Support, Applications, Customers as well as the core software development.
    • Wanted Skills:
      • Real time control experience using VxWorks or other RTOS
      • Experience with C#, .NET, or Smalltalk is a plus.
      • Experience in manufacturing/semiconductor capital equipment industry
      • SEMI Standards
Good luck with your job hunting,
James T. Savidge

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April 22, 2015

Ricardo Moran - Acelerómetro / Giróscopo con Arduino

Hola a todos!
Les cuento que hemos adquirido un kit de sensores y accesorios para Arduino. Hay de los más variados: leds RGB, emisores láser, sensores de temperatura y humedad, de presencia, emisor y receptor de infrarrojo, encoders, acelerómetro, etc.
Uno de los más interesantes es el acelerómetro. Lo probamos con una Arduino Nano y un código que nos devuelve el Yaw, Pitch y Roll.

El sensor al que nos referimos se lo conoce como IMU (Inertial Measurement Unit). Consta de un acelerómetro y un giróscopo. Estos miden la fuerza ejercida por la gravedad y la velocidad.
En este caso, el MPU-6050 es una IMU de 6DOF (“6 Degrees Of Freedom“). Esto significa que lleva un acelerómetro y un giroscopio, ambos de 3 ejes (3+3 = 6DOF).

La conexión con Arduino, se realiza de la siguiente manera:

El MPU-6050 utiliza el protocolo de comunicación I2C, por lo que vamos a requerir descargar la siguiente librería:
(Si no saben cómo instalar una librería adicional para Arduino, pueden consultarlo en

Les paso el código utilizado, que fué extraído de

Finalmente, una captura del sistema funcionando:
Acelerómetro y Arduino

Espero que les haya sido de utilidad. Éxitos!

Cincom Smalltalk - Smalltalk Digest: April Edition

The April edition of The Cincom Smalltalk Digest is available now.

Torsten Bergmann - CORMAS CI job on pharo-contribution

CORMAS - an agent-based simulation framework is currently ported to Pharo.

As of today it is available as a new CORMAS CI job on the continuous integration server (pharo-contribution CI) which is green now as well!

Torsten Bergmann - Kendrick on CI

Kendrick is a Domain-Specific Language and Simulation Plaform for mathematical epidemiology modeling.

The Kendrick project now since today has a Kendrick CI job on the pharo-contribution CI server and runs on Pharo 3.0, 4.0 and 5.0 with all tests green.

This also means you can easily download it using PharoLauncher.

Torsten Bergmann - Dr. Geo (once more)

Torsten Bergmann - Exploring a Postgres database with the GTInspector

The video shows a demo of exploring a Postgres DB using the GTInspector. The session includes exploration, SQL querying, creating a chart, and extending the inspector:


Torsten Bergmann - QualityAssistant v0.4

April 21, 2015

Pharo Weekly - Aconcagua extensions

I pushed some Aconcagua extensions to

One part consists of tiny (so far) Aconcagua models of various domains -
Time*, Money, and Weight at the moment.

The other is the Aconcagua-Magritte package. This gives you
MAMeasureDescription, which represents an Aconcagua Measure. It mostly acts
like a number field mapped to its amount. You just have to tell it which
unit to use to convert the amount number into a Measure.

Example usage:
	MAMeasureDescription new
		accessor: #replacementPrice;
		label: 'Replacement Price';
		unit: AmDollar new;

Then, you can type 100 in a Magritte form and "100 dollars" will be saved to
the model. Enjoy!

Torsten Bergmann - Roll

Roll is a simple repl for Pharo. Check out the project on STHub.

Torsten Bergmann - Aconcagua AddOns

Sean provides some new extensions to Aconcagua. Aconcagua provides a model that represents measures as first class objects.

Pharo Weekly - VirtualGPU

The VirtualGPU is a simple DSL/framework for parallel algorithms.

In this quick video I try to show the performance and the simplicity of this framework, by using as an example simple vectorial and image processing operations.

The structure of this DSL is inspired by the VirtualCPU made by Igor Stasenko et al, and numerical programming such as Matlab and GNU Octave.

This DSL works by composing simple OpenCL kernels.

Torsten Bergmann - SqueakSSL moved + Fixes

If you use the SqueakSSL plugin there are some changes: moved to

There are also some fixes to the SqueakSSL Plugin:
 - Levente Uzonyi's patches to the Linux version
 - Marcel Taeumel and Tobias Pape ported this to the OS X and Windows version as well

They also provide new binaries. Read more.

Torsten Bergmann - Tekka - Japanese character input system on Pharo/Squeak

Tekka is a modeless Japanese character input system on Pharo / Squeak systems. You can type a Japanese word in a plain alphabet, and then press cmd-j to convert it to Japanese characters using SKK dictionary.

Project (and more demos) are on SmalltalkHub.

Torsten Bergmann - VariableTracker in Pharo

VariableTracker is a tool used to collect and analyze information about variables being written during run time in Pharo. It is described in the Bachelor Thesis "Evaluating the dynamic behavior ofSmalltalk applications" by author Roger Stebler (click here for PDF)

Cincom Smalltalk - A Transcript Alternative

The Transcript in Cincom® ObjectStudio® and Cincom® VisualWorks® is a handy place in which to write information.  It is frequently used as a temporary text output interface to communicate information and at times, to aid with debugging.

April 20, 2015

Torsten Bergmann - Bitwise Magazine and Pharo

Remember this post from 2005? It was about the "Bitwise Magazine and Smalltalk" - an online magazine from Huw Collingbourne running a series on Smalltalk. Looks like Huw now found out about Pharo and may start some articles on it as well. Nice!

Pharo Weekly - HoneyGinger mixed with Jun4Pharo

HoneyGinger is a fluid dynamics and visualization library which can simulate moves of liquid caused by obstacles and visualize refraction by estimating angles of water surface from distribution of pressure.

This is rendered by Jun4Pharo in conjunction with HoneyGinger, a fluid
dynamics simulator written in pure Smalltalk :-)

Tomohiro Oda

April 19, 2015

Pharo News - Development on Pharo5 started

<p><a href="">Directly after Pharo 4.0 was released</a> this week the development on Pharo 5.0 started:</p> <ul><li> the <a href="">bugtracker</a> includes a new milestone &quot;Pharo 5.0: 01.04.2016&quot; to mark issues</li><li> there is a new <a href="!/~Pharo/Pharo50Inbox">Pharo 5.0 inbox</a> and a <a href="!/~Pharo/Pharo50">Pharo 5.0 repository</a></li><li> there is a <a href="">CI job for Pharo 5.0</a></li><li> the images are provided at <a href=""></a></li><li> the PharoLauncher allows to download Pharo 5.0, a new <a href="">launcher image is on CI</a></li><li> there is also a <a href="!/~Pharo/MetaRepoForPharo50">meta repo for Pharo 5.0</a> to fill the config browser </li><li> a first integration update <a href="">#50001</a> was already done</li></ul> <p>Feel free to help shaping the future and also make Pharo 5.0 a successful release!</p> <p>(from <a href=""></a>)</p>

ESUG news - ESUG'15 registration is open

We are pleased to announce that registration for the 23rd ESUG Conference in Brescia, Italy is now open!

To register, please proceed to the website or go directly to

Note: Fill carefully your registration because you will receive an automatically generated invoice by email.

Important: do not forget to book your accommodation directly at one of the hotels in Brescia. See:

See you all @ Brescia,

April 18, 2015

ESUG news - [ESUG'15] Last call for student volunteers

You are a student? You want to attend a nice conference but don't have money to afford it? Please apply to the student volunteer program:

This is the last call, so please apply as soon as possible!

Pharo Weekly - Pharo 40 is released

Dear World,
Pharo 4.0 ( is here. Pharo is a pure object-oriented programming language and a powerful environment, focused on simplicity and immediate feedback.
Pharo Team

Benoit St-Jean - Pharo 5.0

Maintenant que Pharo 4.0 est disponible, le développement de Pharo 5.0 débute!

Classé dans:Pharo, Smalltalk Tagged: 4.0, 5.0, Pharo, Smalltalk

April 17, 2015

Cincom Smalltalk - Last Call for Students Wanting to Volunteer at ESUG 2015

Are you a student? Would you like to attend an important, top-notch conference, but can’t afford it?

ESUG news - Pharo 4.0 Released

Pharo 4.0 is here!

Many things have changed in Pharo. Here are some highlights:

  • Inspector/Playground/Spotter are new moldable development tools for inspecting, coding and searching objects.
  • Slots model instance variables as first class entities and enable meta-programming on this level.
  • ShoreLine reporter introduces a way to report system errors and collect statistics, that we will use for future improvements
  • Dark theme.

These are just the more prominent highlights, but the details are just as important. We have closed 1700 issues in Pharo 4.

Pharo is improving on many fronts, but one of the most prominent changes is the addition of moldable tools for inspection and search. These tools provide extension mechanisms that allow every object to define ways in which it can be understood effectively. To provide an idea of the impact of the already existing extensions, the map below shows the Pharo classes grouped in packages, highlighting in red those parts of the system that have at least one such custom view coming with the main distribution. The spread of these extensions shows that moldability is powerful mechanism that can be used in many contexts.

We thank all the contributors of this release:

Clara Allende, Jean-Baptiste Arnaud, Jean-Christophe Bach, Philippe Back, Clement Bera, Alexandre Bergel, Torsten Bergmann, Vincent Blondeau, Noury Bouraqadi, Santiago Bragagnolo, Johan Brichau, Sven Van Caekenberghe, Damien Cassou, Nicolas Cellier, Guido Chari, Dimitris Chloupis, Andrei Chis, Ben Coman, Bernardo Contreras, Tommaso Dal Sasso, Jan Van De Sandt, Christophe Demarey, Sean DeNigris, Marcus Denker, Martin Dias, Stephane Ducasse, Stephan Eggermont, Luc Fabresse, Johan Fabry, Hilaire Fernandes, Jerome Garcia, Tudor Girba, Thierry Goubier, Jigyasa Grover, Kris Gybels, Norbert Hartl, Dale Henrichs, Pablo Herrero, Nicolai Hess, Pavel Krivanek, Juraj Kubelka, Jan Kurs, Laurent Laffont, Jannik Laval, Kevin Lanvin, Max Leske, David Lewis, Diego Lont, Esteban Lorenzano, Tim Mackinnon, Attila Magyar, Esteban Maringolo, Stefan Marr, Max Mattone, Martin Mc Clure, Eliot Miranda, Alain Plantec, Guillermo Polito, Damien Pollet, Stefan Reichhart, Mark Rizun, Udo Schneider, Ignacio Sniechowski, Henrik Sperre Johansen, Igor Stasenko, Aliaksei Syrel, Ciprian Teodorov, Camille Teruel, Sebastian Tleye, Yuriy Tymchuk, Peter Uhnak, Andres Valloud, Sven Van Caekenberghe, Thomas Vincent, Jan Vrany, Martin Walk, Richard Wettel, Dmitri Zagidulin

And all those who contributed indirectly, by reporting bugs, participating in discussion threads and providing feedback.

Pharo 4.0 is another big step. And, the best is yet to come.


The Pharo Team