- Pharo-users - lists.pharo.org

[ANN] UziScript first pre-release!
by Ricardo Moran Jan. 23, 2019

Jan. 23, 2019

Hi everybody, We are very pleased to announce the first pre-release of UziScript ( https://github.com/GIRA/UziScript) a new programming environment for educational robotics. For a long time we've been wanting to show you what we are working on at GIRA (http://tecnodacta.com.ar/gira/) and although we're still far from finished we've decided it's time to share our little project with the community. As some of you may know we work mostly on developing tools to facilitate the use of robots for education. We published Physical Etoys as part of that work. Now we are working on a new programming environment that attempts to fix some common problems we see in most of the tools available for educational robotics. We call this environment UziScript and it consists of a small VM that runs on an Arduino, a web server that runs on your computer, and a set of web tools that use the web server to connect and program the Arduino. We're focusing on Arduino UNO for now (mainly because it's very popular and accessible) but we plan to support other boards in the future. UziScript has a few cool features: - *Block-based and text-based programming*: It includes a block-based programming language suitable for beginners but it also supports text-based programming for more advanced users. To ease the transition UziScript automatically generates the textual code from the blocks (and viceversa). - *Concurrency*: Most educational robotics projects require the implementation of a device that performs two or more simultaneous tasks. UziScript allows the definition of concurrent tasks that will be executed independently from each other. - *Autonomy*: UziScript programs are stored and executed autonomously in the Arduino without requiring a connection to the computer. - *Interactive programming*: If the board is connected to the computer UziScript allows to inspect and monitor the program state while it runs. Furthermore, every change made to the program can be automatically compiled and transmitted to the Arduino, which allows to see the effects of the change almost immediately. - *Debugging*: Without debugging tools the process of fixing programming errors can be frustrating for an inexperienced user. UziScript's debugger provides mechanisms for error handling and step-by-step code execution. All the code is open source and can be found on Github: https://github.com/GIRA/UziScript. We also made a few short videos to show UziScript in action: https://www.youtube.com/playlist?list=PL1aXD47455XPWv4rTXQBuHvamCoNUGeke We're still not ready to use this with actual teachers and students (we have a LOT of bugs and unfinished features) but we think we're ready to show this to other programmers. You can download and try our first pre-release ( https://github.com/GIRA/UziScript/releases/tag/v0.1.1) We would greatly appreciate any comments or suggestions. Have fun! Richo

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Website is down
by Cyril Ferlicot Jan. 23, 2019

Jan. 23, 2019

Hello, pharo.org is currently down, which means that people wanted to check the release cannot. I don't know who can fix that. Have a nice day. -- Cyril Ferlicot https://ferlicot.fr

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RSA and cryptography
by Norbert Hartl Jan. 23, 2019

Jan. 23, 2019

Is there anyone having crypto algorithms implemented or used a native lib to do so. We are using the Cryptography package and have problems. The code is quite old so we wonât spend time fixing it. We rather interface with a native lib. So Iâm asking upfront thanks, Norbert

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Pharo 7 image does not load
by sergio ruiz Jan. 23, 2019

Jan. 23, 2019

I have been working in my image all day today, and it was working great. This evening, when I went to fire it up, it appears to start, but I am not seeing the image running. The icon hangs, and it does nothing. Here is an my debug.log for just one iteration of this. Any help would be appreciated! https://gist.github.com/sergio101/c86396d10f6fea4923b59930ad44a2a0 ---- peace, sergio photographer, journalist, visionary Public Key: http://bit.ly/29z9fG0 #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV http://www.codeandmusic.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

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[ANN] Next Pharo Sprint: Dec 21
by Marcus Denker Jan. 23, 2019

Jan. 23, 2019

(sorry, a bit late this mail): We will organize a Pharo sprint / Moose dojo Jan 25, starting at 10:00am. (Local Time Paris). Goals of this sprint: â¢ Pharo 8 Remote Sprint: Remotely, you can join us on Discord. During the sprint, we synchronize local and remote Pharo sprinters: http://pharo.org/contribute-events <http://pharo.org/contribute-events> Known Local Sprint meetings Lille/France: It will be at the Inria Lille, Building B, third floor (RMoD offices). As the building is not open to the public, please contact us before if you plan to come

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[Iceberg] Loading my git project into a new image
by sergio ruiz Jan. 21, 2019

Jan. 21, 2019

I had a troublesome image today, so my first thought is to dump the image, and load the packages back up in a new image. While I can clone the the repo on in my new image using Iceberg, I canât figure out now to load the packages, now that they are loaded up via iceberg. under âloaded versionâ i see âno package loadedâ. under âstatusâ i see ânot loadedâ.. Thanks! ---- peace, sergio photographer, journalist, visionary Public Key: http://bit.ly/29z9fG0 #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV http://www.codeandmusic.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

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My Pharo image is crashing
by sergio ruiz Jan. 21, 2019

Jan. 21, 2019

I have an image that I have been working on for a few weeks. Today, when I went to edit a method, the image crashed, and it crashes whenever I try to save. normally, I wouldnât care, but this one has a bunch of data (as Ordered Collections in class variables). The current size of the image is 198.6M. How big can they usually get without problems? I saw the number 7G somewhere, so it seems fine. Here is my error log: https://pastebin.com/2yWGCbAC Any ides? Thanks! ---- peace, sergio photographer, journalist, visionary Public Key: http://bit.ly/29z9fG0 #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV http://www.codeandmusic.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

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Pharo 6.1 VMs archive
by Juraj Kubelka Jan. 20, 2019

Jan. 20, 2019

Hi, I have a Pharo 6.1 64bit (macOS) image that worked a month or two ago, but it does not work now. And using a new Pharo 6.1 image with Roassal 2 does not work neither because of a Cairo/libfreetype issue. Where can I find Pharo 6.1 VMs? The only think I likely updated was the VM. I would like to test it with previous VM versions. Was Pharo 6.1 VM 64bit macOS updated recently? Thanks, Juraj Image ----- /Users/jurajkubelka/Pharo/images/test/test.image Pharo6.0 Latest update: #60546 Unnamed Virtual Machine --------------- /Users/jurajkubelka/Pharo/vms/61-x64/Pharo.app/Contents/MacOS/Pharo CoInterpreter VMMaker.oscog-eem.2401 uuid: 29232e0e-c9e3-41d8-ae75-519db862e02c Jun 28 2018 StackToRegisterMappingCogit VMMaker.oscog-eem.2401 uuid: 29232e0e-c9e3-41d8-ae75-519db862e02c Jun 28 2018 VM: 201806281256 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Date: Thu Jun 28 14:56:30 2018 CommitHash: a8a1dc1 Plugins: 201806281256 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Mac OS X built on Jun 28 2018 13:07:33 UTC Compiler: 4.2.1 Compatible Apple LLVM 7.3.0 (clang-703.0.31) VMMaker versionString VM: 201806281256 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Date: Thu Jun 28 14:56:30 2018 CommitHash: a8a1dc1 Plugins: 201806281256 https://github.com/OpenSmalltalk/opensmalltalk-vm.git CoInterpreter VMMaker.oscog-eem.2401 uuid: 29232e0e-c9e3-41d8-ae75-519db862e02c Jun 28 2018 StackToRegisterMappingCogit VMMaker.oscog-eem.2401 uuid: 29232e0e-c9e3-41d8-ae75-519db862e02c Jun 28 2018

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Re: [Pharo-users] Transforming objects
by Richard O'Keefe Jan. 20, 2019

Jan. 20, 2019

I note that #become: is not in the ANSI Smalltalk standard (am I the last person in the world to care about that? Probably) and that several of the Smalltalk systems I have on my machine don't support it. In Squeak 5.2, there were 17 references to #become:. Four of those were just testing it. One is just a mention in a collection of dangerous things to not be tried. Several are ways of changing an object's class. Several are ways of forcibly deleting an object by turning it into something trivial but safe. And a couple, I don't understand. Thing is, #become: is *not* something to do lightly, and the code that calls "x become: y" should "own" both x and y. (In fact one of them is often "self".) About The Design Patterns Smalltalk Companion, draft chapters are available at http://sdmeta.gforge.inria.fr/FreeBooks/SmalltalkDesignPatternCompanion/ When I read the Gang of Four book, it seemed to me that most of it was about fighting the fact that C++ and Java aren't Smalltalk. Read a draft chapter or two to make up your own mind. One difference between the State pattern and #become: is that an object can be an instance of the State pattern in more than one way at the same time. On Thu, 17 Jan 2019 at 05:58, Ben Coman via Pharo-users < pharo-users(a)lists.pharo.org> wrote: > > > On Wed, 16 Jan 2019 at 17:16, LoÃ¯c PagÃ¨s <loic.pages(a)inra.fr> wrote: > >> Dear Pharo users, >> >> I develop software dedicated to the simulation of plant development and >> 3D architecture. >> >> In the past, I used Java, > > but I am very interested in translating code >> in Pharo. I appreciated very much the language and the course. >> >> I have a question for you all : >> >> During plant development (ontogeny), new organs appear, that are >> gradually tranformed. For example, a bud can make a flower, and then a >> fruit. >> >> Organs are conveniently modelled as classes. During the course, I >> learned that it was better to make several classes (bud, flower, fruit) >> instead of a "fat class" such as "reproductive organ" with many >> attributes and stages (bud stage, flower stage, fruit stage). I wonder >> how to transform an object into another one, to represent for example >> the fact that the flower may become a fruit. >> >> Maybe a naive question ? >> > > Maybe #become: ... > https://gbracha.blogspot.com/2009/07/miracle-of-become.html > > but it might be a misuse for your purpose. The following book will > provide some good insights... > https://www.amazon.com/Design-Patterns-Smalltalk-Companion/dp/0201184621 > > cheers -ben > > > >

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Re: [Pharo-users] Limits of ZnManagingMultiThreadedServer
by Stephan Eggermont Jan. 18, 2019

Jan. 18, 2019

Ah, found another consumer of sockets :). For reliable systems, putting limits on the number of retries seems a useful idea. Thanks Sven, Stephan

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