November 2013 - Pharo-dev - lists.pharo.org

[Edu] 3-day project with high school students
by roberto.minelli＠usi.ch Nov. 12, 2013

Nov. 12, 2013

Hi, I would like to hear an opinion from you. I need to organize a 3-day project with high-school students. In short they will come to our University and I am the responsible to guide them to do âsomethingâ to introduce them to programming. The assumption is that they have zero background about programming. In this mailing list Iâve read a couple of previous discussions about how to start to use Pharo and ST for educational purposes, but Iâd love to collect additional opinions. Visual programming is one of the thing that came to my mind. I though about Phratch. Michele suggested me to look also at Etoys (squeakland.org) and I will start to look at thesee two tools in the next days. Any opinion, proposal, tool, article, suggestion, hint on the topic is really welcome. Thanks in advance, Roberto

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Unexpected block variable change of value
by btc＠openinworld.com Nov. 12, 2013

Nov. 12, 2013

I'm not sure if I'm missing something, but there seems some strange behavior that I don't understand. The value of a block variable changes when stepping over a method that acts on that variable. I encountered this in Spec, but that seems co-incidental to the behaviour. SETUP 1. The attached "My-Spec-Tutorial-BenComan.1.mcz" (i.e. Bahman's tutorial) was loaded into build #30564. 2. A breakpoint was inserted after the first "e generateArguments" in... SpecRowLayout>>privateAsArray | result shouldCheckSplitters | result := OrderedCollection new. shouldCheckSplitters := false. (self commands reject: [:e | e isSplitter ]) do: [:e | ...lots..hidden.for..conciseness.... e generateArguments. self haltOnce. "<------------------" e asSpecElements do: [:el | result add: el ]]. 3. The following was evaluated... Halt enableHaltOnce. MyFirstWindow new openWithSpec: #defaultSpec. OBSERVATION 1. When the debugger opened at the breakpoint e = a SpecLayoutAdd 2. But after stepping over #asSpecElements e = an OrderedCollection() So how did the value of 'e' change? Where... SpecLayoutAdd(SpecLayoutSend)>>asSpecElements ^ {self selector.}, self arguments SpecLayoutAdd(SpecLayoutSend)>>selector ^ selector SpecLayoutAdd(SpecLayoutSend)>>arguments ^ arguments This was on Windows 7. Since files.pharo.org is offline, I wasn't able to try a newer VM. My current was... NBCoInterpreter NativeBoost-CogPlugin-EstebanLorenzano.18 uuid: a53445f9-c0c0-4015-97a3-be7db8d9ed6b Mar 13 2013 NBCogit NativeBoost-CogPlugin-EstebanLorenzano.18 uuid: a53445f9-c0c0-4015-97a3-be7db8d9ed6b Mar 13 2013 git://gitorious.org/cogvm/blessed.git Commit: 412abef33cbed05cf1d75329e451d71c0c6aa5a7 Date: 2013-03-13 17:48:50 +0100 By: Esteban Lorenzano <estebanlm(a)gmail.com> Jenkins build #14535 Win32 built on Mar 13 2013 18:49:42 Compiler: 4.6.2 VMMaker versionString git://gitorious.org/cogvm/blessed.git Commit: 412abef33cbed05cf1d75329e451d71c0c6aa5a7 Date: 2013-03-13 17:48:50 +0100 By: Esteban Lorenzano <estebanlm(a)gmail.com> Jenkins build #14535 NBCoInterpreter NativeBoost-CogPlugin-EstebanLorenzano.18 uuid: a53445f9-c0c0-4015-97a3-be7db8d9ed6b Mar 13 2013 NBCogit NativeBoost-CogPlugin-EstebanLorenzano.18 uuid: a53445f9-c0c0-4015-97a3-be7db8d9ed6b Mar 13 2013 cheers -ben

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Pharo 2.0 and Monticello settings: looks like there is no way to change
by phil＠highoctane.be Nov. 12, 2013

Nov. 12, 2013

Hello, It looks like that there is no way to set those values (see screenshot). How comes? Phil

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About MenuModel
by StÃ©phane Ducasse Nov. 11, 2013

Nov. 11, 2013

Hi Ben We do not understand MenuModel in the example we have menu := MenuModel new. â¦ group1 := MenuGroupModel new. item11 := MenuItemModel new name: [ TimeStamp now asString ]; enabled: [ TimeStamp now seconds even ]; yourself. ... model := NewListModel new. model menu: menu then on the NewListModel NewListModel >> menu: aBlock <api: #block getter: #menu registration: #whenMenuChanged:> "Set the block used to defined the menu" menuHolder value: aBlock so it is a block? or a MenuModel? I'm totally confused. Stef

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About MenuItemModel
by StÃ©phane Ducasse Nov. 11, 2013

Nov. 11, 2013

Hi ben do I get it correctly that we pass a block to a block for action action: aBlock action value: aBlock are you sure that you want a block as argument of a block. I would prefer that action is simply a block. Stef

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declareTempAndPaste:
by Alexandre Bergel Nov. 11, 2013

Nov. 11, 2013

Hi! Many of us have discovered that in the last Pharo adding a temporary variable is added before the | .. | part of the section. Pablo Estefo and I spend time on understanding where this comes from. But since this is deep into the compilation chain, it would be great if an expert (Marcus ? :-) could check what we have done. OCUndeclaredVariableWarning>>declareTempAndPaste: is the culprit method. We have changed: tempsMark := self methodNode body leftBar ifNil: [ self methodNode body start ]. into tempsMark := self methodNode body rightBar ifNil: [ self methodNode body start ]. So, the new version of the method should be: -=-=-=-=-=-=-=-=-=-=-=-= OCUndeclaredVariableWarning>>declareTempAndPaste: name | insertion delta theTextString characterBeforeMark tempsMark | theTextString := self methodNode source. tempsMark := self methodNode body rightBar ifNil: [ self methodNode body start ]. characterBeforeMark := theTextString at: tempsMark-1 ifAbsent: [$ ]. (theTextString at: tempsMark) = $| ifTrue: [ "Paste it before the second vertical bar" insertion := name, ' '. characterBeforeMark isSeparator ifFalse: [insertion := ' ', insertion]. delta := 0. ] ifFalse: [ "No bars - insert some with CR, tab" insertion := '| ' , name , ' |',String cr. delta := 2. "the bar and CR" characterBeforeMark = Character tab ifTrue: [ insertion := insertion , String tab. delta := delta + 1. "the tab" ] ]. tempsMark := tempsMark + (self substituteWord: insertion wordInterval: (tempsMark to: tempsMark-1) offset: 0) - delta. self methodNode scope addTemp: name. ^ (node owningScope lookupVar: node name) ifNil: [self error: 'should not happen'] -=-=-=-=-=-=-=-=-=-=-=-= We have tried different cases and it seems to work. Does this makes sense? Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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Amber 0.12.0 released!
by Nicolas Petton Nov. 11, 2013

Nov. 11, 2013

After 3 months of work we are pleased to announce the 0.12.0 release of Amber. Besides the usual bug fixes a lot of new features have emerged. The biggest change is the switch to RequireJS to specify Amber package dependencies and to load the packages as AMD modules. Amber is now additionally available as Bower [2] component. Bower is also used to manage required JavaScript libraries which don't have to be kept around in the repository anymore. The repository layout was restructured to provide a cleaner separation of different Amber parts: * Smalltalk code is located in 'st' * Compiled Amber packages are located in 'js' * Supporting JavaScript code is located in 'support' Together with the RequireJS changes the specifying their dependencies the Brickz [3] reconfigurable micro composition system was introduced. On the Smalltalk side support has been added for writing exponential numbers of the form 2e5. Helios (the new IDE) is progressing nicely and has seen a lot of improvements. One of the great parts is the new stepping debugger which is also making progress. To try Helios, open the helios.html page or evaluate in any other amber page `require('amber/helpers').popupHelios()`. The last enhancements target the commandline compiler which can be used as `amberc` (an executable script) or as a Grunt task. The following features have been added: * generation of shebang line (#!/usr/bin/env node) * specification of target namespace (`-n` flag; `amd_namespace` option in Grunt) * specification of additional library directories (`-L` flag; `library_dirs` option in Grunt) The following features have been removed: * creation of *.deploy.js files (`-d` flag; `deploy` option in Grunt) * optimization passes via Closure compiler (`-o`/`-O` flags; `closure_jar` option in Grunt) The same behavior can be achieved by using specific Grunt tasks Additionally, the Grunt task now handles the -v/--verbose flag which triggers the same behavior as the `verbose` option which can be specified in the Gruntfile. Some numbers about this release (starting from 0.11.0): * 660 commits * 10 committers * 66 unit tests added * 152 issues were closed * 379 unit tests in total Commits: https://github.com/amber-smalltalk/amber/compare/0.11.0...0.12.0 Issues: https://github.com/amber-smalltalk/amber/issues?direction=desc&milestone=8&… For the most important API related changes see the file API-CHANGES.txt. * Installing Amber from NPM To install Amber from NPM, run npm install amber * Installing Amber from Bower To install Amber from Bower, run bower install amber * Migration from Amber 0.11.0 First, the loading of JavaScript files must be adapted. The custom loader has been replaced with requirejs for loading files in the browser. New loader code is thouroughly explained in [4]. After updating the loader part, `.st` files need to be recompiled into new AMD `.js` files. During loader changes, a namespace was choosen and will be needed for recompilation. Go to your directory with `.st` files and issue this from the shell: ```sh <path-to-amber>/bin/amberc -l SUnit,Canvas -n <chosen-namespace> -D <path-for-compiled-js-files> *.st ``` In windows, use `\` as path separator, the rest is identical. The `-l SUnit,Canvas` is just a general guess, if your code depends on more (or less) non-kernel packages from amber, list them here accordingly. This migrate scenario only covers simple deployments with your project's code and amber. If your project is more complicated, using libraries and packages from multiple sources, it is hard to give general advices to migrate - you must do it library by library, giving each location its own namespace, and `-L` option of `amberc` comes handy when integrating; ask on the mailing list if problems arise. [1] http://requirejs.org/ [2] http://bower.io/ [3] https://github.com/amber-smalltalk/brikz [4] https://github.com/amber-smalltalk/amber/wiki/How-to-load-amber Happy Amber hacking! The Amber crew

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Re: [Pharo-dev] TextModel
by Alexandre Bergel Nov. 11, 2013

Nov. 11, 2013

Oh... I have noticed if we do this: PluggableTextMorph>>selectionInterval: sel Transcript show: 'selectionInterval: ', sel printString;cr. selectionInterval := sel Is it not enough to send an announcement? Alexandre On Nov 11, 2013, at 5:41 PM, Benjamin <benjamin.vanryseghem.pharo(a)gmail.com> wrote: > It is actually an issue. > > The problem comes from the fact the morph does not notify its model when its selection changed. > > > Ben > > On 11 Nov 2013, at 21:18, Alexandre Bergel <alexandre.bergel(a)me.com> wrote: > >> Hi Ben, >> >> We have doubt about the getSelection of TextModel. >> >> Execute the following in a Workspace: >> >> model := TextModel new. >> model openWithSpec. >> >> In the window, insert some text, and select something. Evaluate the following: >> model getSelection >> >> It always returns (1 to: 0) for us. >> >> Do you confirm? >> https://pharo.fogbugz.com/f/cases/12144/TextModel-getSelection >> >> Cheers, >> Johan Fabry & Alexandre >> -- >> _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: >> Alexandre Bergel http://www.bergel.eu >> ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. >> >> >> > -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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TextModel
by Alexandre Bergel Nov. 11, 2013

Nov. 11, 2013

Hi Ben, We have doubt about the getSelection of TextModel. Execute the following in a Workspace: model := TextModel new. model openWithSpec. In the window, insert some text, and select something. Evaluate the following: model getSelection It always returns (1 to: 0) for us. Do you confirm? https://pharo.fogbugz.com/f/cases/12144/TextModel-getSelection Cheers, Johan Fabry & Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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Nov. 11, 2013

HI guys with ronie we were looking at how we can remove update: methods ( fun story) and we found update: aSymbol "Update the image if changed." super update: aSymbol. aSymbol = self getImageSelector ifTrue: [ self updateImage] and here we see that a static self announcer when: #jkhjkh send: #updateImage to: self does not work so we thought that we can change getImageSelector: anObject getImageSelector := anObject into getImageSelector: anObject getImageSelector := anObject. self announcer when: anObject send: #updateImage to: self but this is not nice because we should clean before. Now the problem (and I would like to get your point of viee) is that announcer only define unregister: anObject and the granularity is too large because we do not want to lose all the other resgitrations we did. Tx for your anwsers Stef

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