April 2017 - Pharo-users - lists.pharo.org

VoyageMongo questions
by john pfersich April 30, 2017

April 30, 2017

Has anyone tried to use VoyageMongo to connect to a MongoDB instance not on the local machine? I used the VoyageMongo from Smalltalkhub like the "Persisting Objects with Voyage" said and it looks like I had the same problem that Sabine mentioned on Discord; "Not enough space for external objects, set a larger size at startup", but there was a (another) problem and the image was toasted. I then tried to load VoyageMongo into Pharo 5 from the Catalog Browser and there's an error and it won't load. Any hints on what I'm doing wrong? I'm using Pharo5.0 Latest update: #50761.

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Implement Matrix whith OrderedCollection
by frankl1_miky April 30, 2017

April 30, 2017

Hi everyone, I'm figuring out a strange behavoir with OrderedCollection. Actually I've created a matrix using OrderedCollection like this: /c := OrderedCollection new: 16 withAll: (OrderedCollection new: 16 withAll: 0). c./ But when I try to set the value at row 1 and column 2 to be 50 like this: /(c at: 1) at: 2 put: 50/ I instead get 50 in any cell of the second column and I don't know why. When using a Matrix and the massage at:at:put, the behavoir is normal. Why that strange behavoir with OrderedCollection? -- View this message in context: http://forum.world.st/Implement-Matrix-whith-OrderedCollection-tp4945002.ht… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Process scheduling
by raffaello.giulietti＠lifeware.ch April 30, 2017

April 30, 2017

Hi, I can't find a description on how ProcessorScheduler in Pharo (i.e., Cog) is supposed to do context switches in absence of other synchronization points. Is it following the BlueBook spec? Just to recall that model, the VM, when about to execute the current bytecode instruction of the current Process, checks whether a strictly higher priority Process is ready to run and if so, switches to (one of) the highest priority among them. Thanks in advance for clarifications. Greetings Raffaello

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Pharo 6 / VM crashes
by volkert April 30, 2017

April 30, 2017

|Dear all, | |from time to time i trying the lastest Pharo 6 (curl get.pharo.org/60+vm <http://get.pharo.org/60+vm> | bash) and i am always a bit scarred about its stability. I mainly use Roassal and Athens and after a few minutes the VM crashes. The the same happens with Pharo 5, but less often ... i am using Linux Ubuntu 16.04 ... | |What is the best way to help you to improve the situation? | |Volkert| | | | | | | | | | | | |

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Dark theme and white vs. green color
by Juraj Kubelka April 30, 2017

April 30, 2017

Hi, While we were improving the DiffMorph for the dark theme, we conclude that it is much harder to read the text. I personally also often miss a new debugger window on a big screen. Something I have not experienced before. And this discussion reminds me the old computers where the background was black and text green. There are two screenshot to compare it: A personally feel that it is much easier to read the green text. What do you think? Juraj

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MOOC offline download
by Ben Coman April 30, 2017

April 30, 2017

I was just chatting with someone with limited Internet who was looking to odownload the mooc files [1] for use offline. Does such exist? [1] http://files.pharo.org/mooc cheers -ben

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Spec Adapter Advice
by Rob Rothwell April 29, 2017

April 29, 2017

Hello, I have recently been lucky enough to get the Cocoa portion of Mars working on Pharo 5.0. While there are some issues, it has a wonderful set of examples that allowed me create new Cocoa classes and delegate methods and see a straightforward path to learning how to use Coco widgets from Pharo. I'd like to do that by creating appropriate Spec adapters, but unfortunately the new Spec booklet wasn't designed for that! Can anyone give me any insight into creating (and using) a new Spec adapter? Maybe just some high level steps to help me orient my investigation into how Spec works? Thank you, Rob

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Neural Networks in Pharo
by Oleksandr Zaytsev April 29, 2017

April 29, 2017

Hello! Several weeks ago I've announced my NeuralNetworks project. Thank you very much for your ideas and feedback. As suggested, I wrote examples for every class and tested my perceptron on linearly-separable logical functions. I have just completed a post about my implementation of a single-layer perceptron: https://medium.com/@i.oleks/single-layer-perceptron-in-pharo-5b13246a041d. It has a detailed explanation of every part of the design and illustrates different approaches to implementation. Please, tell me what you think. Are my class diagrams correct or did I mess something up? Is there a design pattern that I should consider? Do you think that I should do something differently? Should I improve the quality of my code? Yours sincerely, Oleksandr

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Basic controls <Normal List> does not change selection
by bachitoph April 28, 2017

April 28, 2017

Hello, porting my digitalk / dolphin application to pharo (www.trimfox.com) I have to port my dialog creation part. Unfortunately I can't use Spec because my dialog creation depends on boundingBox: (Pharo bounds:) by calculation position and extent in pixels. So I have to use Morphic. There is the nice class WidgetExamples which helped me very much. But the Normal List control does not change selection if there is a click on another item. You can see the behavior evaluating the code below, and click maybe on the <Two> item. Same behavior in my Dialog class. Any hint! WidgetExamples exampleBasicControls thanks cjb -- View this message in context: http://forum.world.st/Basic-controls-Normal-List-does-not-change-selection-… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Modal Menu in Pharo5
by Christoph J. Bachinger April 28, 2017

April 28, 2017

Hello, I'm looking for a modal menu. It should stop method code execution until any left mouse klick. I tried MenuMorph with code like below, but this does not stop execution. Any hint? thank you cjb ComposableModel subclass: #BachitophTestWindow instanceVariableNames: '' classVariableNames: '' poolDictionaries: '' category: 'Trimfox'. BachitophTestWindow compile: 'initializeWidgets'. |window menu choice| window := BachitophTestWindow new openWithSpecLayout: SpecLayout composed. menu := MenuMorph new defaultTarget: window; color: (window theme menuColorFor: window); addToggle: 'abcabcabcabc' target: window selector: #yourself"(labels at: 1)"; addToggle: 'cdfgcdfgcdfg' target: window selector: #yourself; addLine; addToggle: 'hijkhijkhijk' target: window selector: #yourself; yourself. choice := menu popUpInWorld. choice selectedItem isNil ifTrue: [ choice := 'abc' ] ifFalse: [choice := choice selectedItem contents]. self halt.

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