February 2018 - Pharo-users

ImageWorker error in P6.1
by Martin Dias Feb. 10, 2018

Feb. 10, 2018

Hello! The ImageWorker project, that provides the possibility to fork a OS process with a copy of current image, was working fine in Pharo 60400 but it's not working on latest 6.1. The output there is "External Image Failed: 256". Any hint? Steps to reproduce error: 1. download: curl get.pharo.org/60+vm | bash 2. load: Metacello new repository: 'http://www.smalltalkhub.com/mc/PharoExtras/ImageWorker/main'; configuration: 'ImageWorker'; version: #stable; load. 3. inspect: ImageWorker do: [ 1+2 ] within: 1 seconds onTimeout: [ self error: 'timeout' ]. Cheers, MartÃn

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Code formatting in CustomHelp
by CÃ©drick BÃ©ler Feb. 10, 2018

Feb. 10, 2018

Hi, Iâm doing some tutorials with the help system. In ProfStef, there is code formatting but not thrgouh the HelpBrowser. In CustomHelp sublclasses, itâs possible to have some formatting (heading:, bold:, â¦). Do you know if itâs possible to have a #code: method so as to use shout specifically ? It doesnât seem obvious to me. TIA CÃ©drick

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Websocket features
by Ben Coman Feb. 10, 2018

Feb. 10, 2018

@Sven, I'm new to websockets and don't properly grok all the features in columns here... https://en.wikipedia.org/wiki/Comparison_of_WebSocket_implementations but could you comment on which are provided by Zinc Websockets? cheers -ben

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Neural Network - Handwritten Digit Recognition
by Pierce Ng Feb. 10, 2018

Feb. 10, 2018

Hi all, I've written a blog post on recognizing handwritten digits using neural networks in Pharo. http://www.samadhiweb.com/blog/2018.02.04.neural.networks.html I attach here two screenshots built using Roassal showing good and bad recognition outcomes. I must say Roassal is great! Comments welcome here or on my blog. Pierce

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Generate equality
by Herbert VojÄÃk Feb. 9, 2018

Feb. 9, 2018

Hi! Do you think it would be reasonable to have, a la "generate accessors" / "generate initialize method", a "generate equality" thingie that would generate #= and #hash for the method, mechanically? Just created a new "piece of data" class and felt like it would be helpful. Herby

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PetitParser: Building composed (dependent) parsers and isolating productions code
by Arturo Zambrano Feb. 8, 2018

Feb. 8, 2018

Hi All, Could you please share some advice on the following situation? I wrote my first Petit Parser. From the documentation I read that: 1) it is possible to depend on other parsers making the development more modular. 2) The docs also suggest that, in order to separate grammars rules from productions, we can make a parser with productions a subclass of a parser which defines the grammar. I started applying 1) so my structure is something like AbstractParser " contains some common basic elements common to all subclasses) StatementAParser StatementBParser PLParser "this guy uses the StatementX parsers" So there is a parser for different statements of the programming language. The PLParser uses PetitParser dependency mechanism to rely on the Statement*Parsers. For instance: PLParser>> ruleB ^ (self dependencyAt: StatementBParser) ruleB So far so good, the grammar is working, the parser works. Now, I would like to write the productions, separately from the grammar part (remember 2) ), so I should make subclasses adding the productions in the form >>ruleA ^super ruleA ===> [ my production code] The point is that PLParser explicitly depends on Statements*Parser, and the name of the Statement*Parser appears here and there, so creating subclasses would result in maintenance nightmare. The new layer of parsers with productions will duplicate the dependencies and I foresee it will be a mess. So now, I think that having just one big class with all the rules for the grammar is better if you plan to separate productions code isolated from the grammar. Am I right? Maybe I'm missing some point regarding writing composed parsers and separating productions from grammar. Any pointer or comment is welcome. Arturo

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Re: [Pharo-users] GT Documenter status
by Tudor Girba Feb. 8, 2018

Feb. 8, 2018

Hi, Thanks for the report. Unfortunately, I do not see the screenshot. Can you resend it? If you installed the code using your script, you should gotten Moz2D as well. Doru > On Feb 8, 2018, at 7:59 PM, Peter H. Meadows via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > From: "Peter H. Meadows" <peter.h.meadows(a)googlemail.com> > Subject: GT Documenter status > Date: February 8, 2018 at 7:59:26 PM GMT+1 > To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> > > > Hi. I'm looking at GT Documenter in Pharo 6.1 on Ubuntu. > It doesn't display any spaces, and some of the text looks strange. > (see attachment for screenshot). > Why? > (screenshot is from Moose6.1 beta image, but it's the same in Pharo6.1) > > The screenshot from https://github.com/feenkcom/gtoolkit looks normal. > > It's using Cairo? Is the plan still to switch to Moz2D? > > I installed by: > Metacello new > baseline: 'GToolkit'; > repository: 'github://feenkcom/gtoolkit/src'; > load. > > Image > ----- > /home/phm/Pharo/images/Moose Suite 6.1 (beta)/Moose Suite 6.1 (beta).image > Pharo6.0 > Latest update: #60529 > Unnamed > > Virtual Machine > --------------- > /home/phm/Pharo/vms/61-x86/lib/pharo/5.0-201707201942/pharo > CoInterpreter VMMaker.oscog-eem.2254 uuid: > 4f2c2cce-f4a2-469a-93f1-97ed941df0ad Jul 20 2017 > StackToRegisterMappingCogit VMMaker.oscog-eem.2252 uuid: > 2f3e9b0e-ecd3-4adf-b092-cce2e2587a5c Jul 20 2017 > VM: 201707201942 https://github.com/OpenSmalltalk/opensmalltalk-vm.git > $ Date: Thu Jul 20 12:42:21 2017 -0700 $ Plugins: 201707201942 > https://github.com/OpenSmalltalk/opensmalltalk-vm.git $ > > Unix built on Jul 20 2017 20:49:20 Compiler: 4.6.3 > VMMaker versionString VM: 201707201942 > https://github.com/OpenSmalltalk/opensmalltalk-vm.git $ Date: Thu Jul > 20 12:42:21 2017 -0700 $ Plugins: 201707201942 > https://github.com/OpenSmalltalk/opensmalltalk-vm.git $ > CoInterpreter VMMaker.oscog-eem.2254 uuid: > 4f2c2cce-f4a2-469a-93f1-97ed941df0ad Jul 20 2017 > StackToRegisterMappingCogit VMMaker.oscog-eem.2252 uuid: > 2f3e9b0e-ecd3-4adf-b092-cce2e2587a5c Jul 20 2017 > > Operating System/Hardware > ------------------------- > unix linux-gnu i686 > > Thanks in advance. > <Screenshot from 2018-02-08 11-54-09.png> > -- www.tudorgirba.com www.feenk.com "Sometimes the best solution is not the best solution."

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[Newb Question] Single Nautilus window?
by Animosity Feb. 8, 2018

Feb. 8, 2018

Is there a way to direct all Browse requests (context menu, Browse buttons in other dialogs, etc.) to a single Nautilus window instead of opening up a new one for each request? Thank you in advance. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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GT Documenter status
by Peter H. Meadows Feb. 8, 2018

Feb. 8, 2018

Hi. I'm looking at GT Documenter in Pharo 6.1 on Ubuntu. It doesn't display any spaces, and some of the text looks strange. (see attachment for screenshot). Why? (screenshot is from Moose6.1 beta image, but it's the same in Pharo6.1) The screenshot from https://github.com/feenkcom/gtoolkit looks normal. It's using Cairo? Is the plan still to switch to Moz2D? I installed by: Metacello new baseline: 'GToolkit'; repository: 'github://feenkcom/gtoolkit/src'; load. Image ----- /home/phm/Pharo/images/Moose Suite 6.1 (beta)/Moose Suite 6.1 (beta).image Pharo6.0 Latest update: #60529 Unnamed Virtual Machine --------------- /home/phm/Pharo/vms/61-x86/lib/pharo/5.0-201707201942/pharo CoInterpreter VMMaker.oscog-eem.2254 uuid: 4f2c2cce-f4a2-469a-93f1-97ed941df0ad Jul 20 2017 StackToRegisterMappingCogit VMMaker.oscog-eem.2252 uuid: 2f3e9b0e-ecd3-4adf-b092-cce2e2587a5c Jul 20 2017 VM: 201707201942 https://github.com/OpenSmalltalk/opensmalltalk-vm.git $ Date: Thu Jul 20 12:42:21 2017 -0700 $ Plugins: 201707201942 https://github.com/OpenSmalltalk/opensmalltalk-vm.git $ Unix built on Jul 20 2017 20:49:20 Compiler: 4.6.3 VMMaker versionString VM: 201707201942 https://github.com/OpenSmalltalk/opensmalltalk-vm.git $ Date: Thu Jul 20 12:42:21 2017 -0700 $ Plugins: 201707201942 https://github.com/OpenSmalltalk/opensmalltalk-vm.git $ CoInterpreter VMMaker.oscog-eem.2254 uuid: 4f2c2cce-f4a2-469a-93f1-97ed941df0ad Jul 20 2017 StackToRegisterMappingCogit VMMaker.oscog-eem.2252 uuid: 2f3e9b0e-ecd3-4adf-b092-cce2e2587a5c Jul 20 2017 Operating System/Hardware ------------------------- unix linux-gnu i686 Thanks in advance.

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[ANN] CloudflareUn
by Ben Coman Feb. 8, 2018

Feb. 8, 2018

I needed to pass through a Cloudflare guard so made a tiny library that others may find useful. https://github.com/Traadh/cloudflareun Also I wrote a post detailing the background behind it... http://blog.openinworld.com/2018/02/pharo-v-cloudflare/ cheers -ben

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