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How to use the serial port on MacOS X?
by olivier auverlot March 12, 2017

March 12, 2017

Hi, I try to use the serial port to communicate with an Arduino. On Linux, no problemo. I can open the serial port with the following code: | serialPort baudRate comPortNumber | baudRate := 31250. comPort := '/dev/ttyACM0'. serialPort := SerialPort new baudRate: 31250; dataBits: 8; stopBitsType: 1; parityType: 0; yourself. "the port is closed to ensure that it will be free" serialPort close. (serialPort openPort: comPort) isNil ifTrue: [ ^self error: 'COM port not available' ] ifFalse: [ serialPort inspect ]. serialPort close. But on MacOS X (10.11.6), the same code used with /dev/cu.usbmodel1411 doesn't run. The error is "Cannot open '/dev/cu.usbmodel1411'". I'm sure that is the correct serial port. If I type "more -f /dev/cu.usbmodel1411" in a terminal, the rx/tx leds of the Arduino are blink. Someone has an idea about this problem that is not specific of the Arduino but concerns the generic usage of the serial port with Pharo? Best regards Olivier ps: I can't test on Windows but I'm interested by a feedback.

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Easy question about syntax.
by sergio ruiz March 12, 2017

March 12, 2017

I have a simple one, but i need to understand what is going on.. i have something like Tree with a class method trees ^ trees ifNil: [OrderedCollection new] i initially ran into trouble with it locking my image up because i wrote it as: trees ^ self trees ifNil: [OrderedCollection new] what is the semantic difference between these two calls? THanks! Â ---- peace, sergio photographer, journalist, visionary Public Key:Â http://bit.ly/29z9fG0 #BitMessageÂ BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV http://www.Village-Buzz.com http://www.ThoseOptimizeGuys.com http://www.coffee-black.com http://www.painlessfrugality.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

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GitFileTree repository creation crashes Pharo
by Jan BlizniÄenko March 12, 2017

March 12, 2017

Hello I decided to give another try to GitFileTree. My last try was 2 years ago, but I had to revert to simple filetree because of frequent crashes while saving to gitfiletree repository on Windows. Today my attempt ended much more quickly. What I did and what was the result? 1) Downloaded Pharo 5 for Windows from http://pharo.org/download and opened it 2) Found GitFileTree, selected Install stable version and confirmed I want to install although it was not tested for Pharo 5 -> it loaded without visible problem 3) Opened Monticello, +Repository, selected empty directory I just created, clicked Ok -> image closed (like if I killed Pharo process - no error, no question, just closed) So, I am not even sure how to even debug it. Is this any common problem or did I miss something? I tried it also in latest Pharo 6, I tried also loading using code from github://dalehenrich/filetree:pharo6.0_dev/repository , I tried also latest VM, but no luck so far. I have Windows 10 64bit. Thank you Jan -- View this message in context: http://forum.world.st/GitFileTree-repository-creation-crashes-Pharo-tp49382… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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New Version of Pillar on Windows
by mldavis＠chaparralwest.com March 12, 2017

March 12, 2017

I am trying out the new version of Pillar (build 1940 or 1941) on Windows on Pharo 50770, following the Pillar tutorial in Enterprise Pharo book: I created the new file first.pillar containing: ! Hello World I ran: C:\Users\mldavis\Desktop\mldPillarWorking>Pharo.exe Pillar.image pillar export --to=html first.pillar It created a file named: output.html.json containing: {"content":"<section>\r\n<h1>1. Hello World</h1>\r\n</section>"} It was supposed to be an HTML document as shown in Enterprise Pharo para 14.2 page 213 "5 Minutes Tutorial". Any suggestions what I missed or should do? mike

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Pharo Association event listing updated
by Marcus Denker March 10, 2017

March 10, 2017

Hi, I added all events (tech talks, sprints, pharodays) that will happen till June here: https://association.pharo.org/events Marcus

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Archive Page for Pharo TechTalks
by Marcus Denker March 9, 2017

March 9, 2017

Hi, I added http://pharo.org/TechTalk <http://pharo.org/TechTalk> This is linked from http://pharo.org/community <http://pharo.org/community> The idea is to keep a log of all past tech talks with links to the archival recording (if there is one). Marcus

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Moving from Slack to Discord
by Dimitris Chloupis March 9, 2017

March 9, 2017

I have been aware about Discord for some time now , but I never used it because both Pharo and Unreal channels are on Slack. From my small experience with it, it seemed much more superior to Slack with added bonus that is completely free (open source ) and with no restrictions unlike Slack. But something happened suddenly yesterday, I opened Unreal in Slack and it was gone with a notification that they moved to Discord. So I grabbed this opportunity to create a Pharo server you can join here https://discord.gg/F6nAd Discord works as web apps but also you can download as an app for Windows, Macos , iOS and Android. I will be around in Discord because I generally browser Unreal channels. The nice thing about Discord also is that it offers both audio and video chat for free which can work great for Pharo sprints. Anyway there is no harm on testing it.

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Voyage and Date
by Hilaire March 9, 2017

March 9, 2017

Hi, Not sure it is related to this: http://forum.world.st/Possible-bug-with-Voyage-Mongo-date-tt4735597.html But a date 1966-2-17 is persisted as a DateAndtime of value 1966-02-16T23:00:00+00:00 in the repository, which when retrieve will then be 1996-16-2, and so on.... Exactly the utc time for a local 1966-17-2T00:00:00+00:00 Could it be the implicated code? : (GratuitousIncompatibilities intToDateAndTime: (GratuitousIncompatibilities dateToMilliseconds: '1966-2-17' asDate)) asDate => 16 FÃ©vrier 1966 And even worst: (GratuitousIncompatibilities intToDate: (GratuitousIncompatibilities dateToMilliseconds: '1966-2-17' asDate)) asDate => 15 FÃ©vrier 1966 Hilaire -- Dr. Geo http://drgeo.eu

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<Programming> 2017: Call for participation
by Tim Molderez March 9, 2017

March 9, 2017

----------------------------------------------------------------------- <Programming> 2017 : The Art, Science, and Engineering of Programming April 3-6, 2017, Brussels, Belgium http://2017.programming-conference.org ----------------------------------------------------------------------- We are excited to welcome you to <Programming> 2017, a new conference focused on everything to do with programming. It takes place at the Vrije Universiteit Brussel, Belgium on April 3-6. The <Programming> conference is closely associated with the open-access journal "The Art, Science, and Engineering of Programming".Â The journal's first two issues form the conference's research track, which means you can freely access all papers presented at the conference before it even starts! Along with the research track, <Programming> 2017 features a program with two main keynotes, two symposia, eight workshops, a coding dojo, a demo track, and a student research competition. To catch a glimpse of what <Programming> 2017 has to offer, feel free to have a look at our overview video: https://www.youtube.com/watch?v=GM_hLNW4ioE *********************************************************************** Program highlights *********************************************************************** Main conference: - Keynote: "Live Literate Programming" by Gilad Bracha - Keynote: "How Racket Went Meta" by Matthew Flatt - Research track: 18 full papers - Demonstrations: 10 tool demos - ACM Student Research Competition: 8 entries Co-located events: - 10th European Lisp Symposium: 2 keynotes by Hans HÃ¼bner and Bohdan Khomtchouk, ~18 papers (not final yet) - Modularity 2017: 8 invited talks by JÃ¶rg Kienzle, Shmuel Katz, Mira Mezini, Bedir Tekinerdogan, StÃ©phane Ducasse, Uwe AÃmann, Lodewijk Bergmans and Mario SÃ¼dholt - CoCoDo - RainCode Labs Compiler Coding Dojo: code together with experts Adrian Johnstone, Elizabeth Scott, Robby Findler, and more to come! - LASSY - Workshop on Live Adaptation of Software SYstems - MiniPLoP - Mini Pattern Languages of Programs writers' workshop - MOMO - Workshop on Modularity in Modeling - MoreVMs - Workshop on Modern Language Runtimes, Ecosystems, and VMs - PASS - Workshop on Programming Across the System Stack - PX - Workshop on Programming Experience - ProWeb - Programming Technology for the Future Web - Salon des RefusÃ©s workshop Social events: - Beer reception at the conference venue (April 3rd) - Reception at the Musical Instruments Museum (April 4th) - Banquet at the Natural Sciences Museum (April 5th) *********************************************************************** Registration, attendance and accommodation *********************************************************************** - You can register for <Programming> 2017 at: http://2017.programming-conference.org/attending/registration - Early registration ends soon! Please register before March 13th to obtain the early-bird discount. - More information on attending the conference is available at: http://2017.programming-conference.org/attending/reaching-the-conference - More information on accommodation is available at: http://2017.programming-conference.org/attending/accomodation *********************************************************************** About Brussels *********************************************************************** Brussels is the capital of Belgium, and home to the headquarters of the European Union. Despite its European nature and all the different languages spoken on every street corner, Brussels still has a very "village-like"Â character. It's well known for its Grand-Place, its Atomium, its Manneken-Pis, its Gueuze and its Kriek, its waffles and its chocolates. Be sure to take some time off to soak up the special atmosphere of its many different districts: Take a stroll to Rue Dansaert, Halles Saint-GÃ©ry, and Place Sainte-Catherine. Head for Saint-Boniface, ChÃ¢telain, or Flagey. In other words, go ahead and relish Brussels, a fine and beautiful city to explore and discover. ----------------------------------------------------------------------- For more information, please visit http://2017.programming-conference.org You can also find us on Twitter (twitter.com/programmingconf) and Facebook (facebook.com/programmingconf) Looking forward to see you in Brussels, Theo D'Hondt (General chair), Wolfgang De Meuter (Organizing chair), Crista Lopes (Program chair), JÃ¶rg Kienzle, Ralf LÃ¤mmel, Hidehiko Masuhara, Tim Molderez, Tobias Pape, and Jennifer Sartor

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How to remove a class ?
by Hilaire March 9, 2017

March 9, 2017

Hi, One creates by code a new class with: "Object subclass: #Situation". What is the counter part API to remove it from the system? Thanks Hilaire -- Dr. Geo http://drgeo.eu

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