- Pharo-users - lists.pharo.org

NeoCSV and special handling for some columns
by Nicolai Hess Oct. 3, 2015

Oct. 3, 2015

Hi, I have two problems I could not solve: 1. I would like to read only some columns: I have a large file with ~30 colums, but I am only interested on ~5 columns (not that important, I could pre-process the file) but anyway it would be nice to do it in smalltalk. 2. some columns will contain only strings (quoted values) and some only numbers, but the field may be empty, is it possible to define the default "emptyValue" as an - empty string for empty fields in the "string column" - 0 for empty fields in the "number column"? thanks in advance nicolai

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IS there TypePlug for Pharo or similar type annotation tool?
by Peter UhnÃ¡k Oct. 3, 2015

Oct. 3, 2015

Hi, What options do we have in terms of type annotations in Pharo? I stumbled upon TypePlug this https://marcusdenker.de/talks/08ParisTypes/08ParisTypePlug.pdf (or rather this http://scg.unibe.ch/archive/masters/Hald07a.pdf ) which enabled type annotation for Squeak such as ~~~~~~~~~~~~~~~~ Fruit>>mixWith: aFruit <:type: Fruit :> ^ (Array with: self with: aFruit) <:type: Array E: Fruit :> ~~~~~~~~~~~~~~~~ Orange>>color ^ (Color orange) <:type: Color :> ~~~~~~~~~~~~~~~~ (or even blocks) [ :a1 <:type: Integer :> :a2 <:type: Integer :> | a1 + a2 ] ~~~~~~~~~~~~~~~~ obviously something like this wouldn't even compile in Pharo (does Sqeak have different syntax for pragmas, or did the TypePlug change the syntax?) And my question is... is there a port of this, or something similar? I've also found this http://randycoulman.com/blog/2013/02/12/specifying-types-for-smalltalk-fit/ Which is a framework for integrated testing that uses pragmas such as ~~~~~~~~~~~~~~~~ makeBatchWithdrawalOn: aDate note: aString <fitTakes: #(#{Date} #{String})> <fitReturns: #{Fixture}> ^(BatchWithdrawalFixture date: aDate note: aString) systemUnderTest: systemUnderTest ~~~~~~~~~~~~~~~~ Right now I am exploring what options we have in Pharo in terms of type annotations (before writing yet-another-library ;-)). Thanks, Peter

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Accessors vs instance variables
by Lyn Headley Oct. 3, 2015

Oct. 3, 2015

Hello, As I understand it, in Smalltalk, the instance variables of a class C are "protected" - able to be referenced by methods of C or its subclasses, but not by other objects. This is a useful feature as it clearly points out which pieces of data are not available to other objects, and thereby simplifies code. However, I am often unsure of whether to use this feature or not, as it conflicts in my mind with the practice of using accessor methods. I like accessor methods because they make it easy to change behavior later -- If I have a dozen calls to an accessor method, then I only need to change it in one place. If these were instance variable references, I would have to do more work. The disadvantage of accessor methods is that they obscure the protected status of data -- it becomes unclear how protected an instance variable is meant to be. (Accessors also make it harder for me to find users of the data when browsing, when there are senders from totally unrelated classes, although I suspect I have just not figured out how to browse scoped in the right way for this). It occurs to me that a tool could be (easily?) developed that would solve this problem. It would take existing variable references and turn them into calls to accessor methods. That way, I could have protection when I want it, and easy ability to change code as well. Does something like this exist, or is it feasible to build? How do others think about this issue? -Lyn

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Analysis/Visualizations of DBs
by Torsten Bergmann Oct. 3, 2015

Oct. 3, 2015

Hi, we have many nice analysis and visualizations tools available (Moose, Roassal, ViDi, ...) Often it is focused on development or code. Also we have refactoring tools. What would be cool would be to have some tool for doing this on (relational) databases and included data: - visualize databases (tables, data clusters, number of columns, ...) - analyze tables on satisfying some (external) business constraints and consistency rules - refactoring of databases (moving, migrating colums, ...) - easy building reports/visualizations of included data (extract, query, filter, ...) What I think of is a tool where (after connecting to a possibly unknown database) you can easily get/build an overview on the design, quality and data of the database (similar to what Moose, ViDi does for code). Is there any research, projects, ... for data mining already in Pharo? I guess this could make up a great toolset with Pharo as a base and make it more known because in the software business relational databases play a big role. Any takers for the next Pharo success story? ;) Bye T.

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Spec LabelModel's #font: and other styles
by Peter UhnÃ¡k Oct. 3, 2015

Oct. 3, 2015

Does it make sense to be able to specify font and similar at Spec-level? And not just font, also the size, color, or emphasis (which currently only emphasis is supported). >From one perspective it's handy, because I can change it at a whim, however I wonder whether this shouldn't be responsibility of some styler instead. Text as far as I know is capable of storing styled information. This would enable to outsource the style information to someone else (e.g. your stylesheet). However from practical perspective for the end user it would be extra work as it would add an indirection step. For TextModel that would be clearly better (because you might want to style different parts of text differently), however for LabelModel I'm not so sure. Any opinions? Thanks, Peter

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Re: [Pharo-users] Rubric events
by Miguel Campusano Oct. 2, 2015

Oct. 2, 2015

Yes, I tried. For what I see is the that the text of the morph still have not been setter when this announcement is triggered On Fri, Oct 2, 2015 at 8:36 AM Alain Plantec via Pharo-users < pharo-users(a)lists.pharo.org> wrote: > Hello Miguel, > Did you tried to subscribe to RubTextUpdatedInModel through the model of > the morph (and not directly the morph) ? > Cheers > Alain > > > > On 30 Sep 2015, at 16:52, Miguel Campusano <mcampusa(a)dcc.uchile.cl> > wrote: > > > > Hello, > > I'm working on modifying the styling of text by using > RubTextSegmentMorph. The problem is that the text could be modified > dynamically by selecting another text, so the styling must be modified. > > I want to use the announcements system of Rubric but something weird > happens. When I subscribe to the announce RubTextUpdatedInModel of the > RubScrolledTextMorph, the styling sometimes works, sometimes doesn't. > > What I noticed in the method > RubScrolledTextMorph>>whenTextUpdatedInModel: > > the announcement is done before setting the text in the morph and if I > change this to make the announcement after setting the text, everything > works fine. > > > > So my question is: > > Is there something special to announcer the set of the text before > actually setting it? Is it ok to change it? > > OR > > Is another way to do what I want to do? > > > > Bests, > > Miguel > > >

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GTInspector: add view tab for custom object
by Mark Rizun Oct. 2, 2015

Oct. 2, 2015

Hi everyone, I would like to extend GTInspector for custom object - add a roassal view tab. I found this kind of code to do this: gtInspectorViewIn: composite <gtInspectorPresentationOrder: 40> composite roassal2 title: 'View'; painting: [ :view | self viewOn: view ] The problem is, that I want to use a view that I already have, but not the one which is passed as an argument to block [ :view | self viewOn: view ]. It should be simple. Am I missing something? Best regards, Mark -- View this message in context: http://forum.world.st/GTInspector-add-view-tab-for-custom-object-tp4853161.… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Re: [Pharo-users] Rubric events
by Marcus Denker Oct. 2, 2015

Oct. 2, 2015

This mails arrived here empty. > On 02 Oct 2015, at 08:36, Alain Plantec via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > > >

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Rubric events
by Miguel Campusano Oct. 2, 2015

Oct. 2, 2015

Hello, I'm working on modifying the styling of text by using RubTextSegmentMorph. The problem is that the text could be modified dynamically by selecting another text, so the styling must be modified. I want to use the announcements system of Rubric but something weird happens. When I subscribe to the announce RubTextUpdatedInModel of the RubScrolledTextMorph, the styling sometimes works, sometimes doesn't. What I noticed in the method RubScrolledTextMorph>>whenTextUpdatedInModel: the announcement is done before setting the text in the morph and if I change this to make the announcement after setting the text, everything works fine. So my question is: Is there something special to announcer the set of the text before actually setting it? Is it ok to change it? OR Is another way to do what I want to do? Bests, Miguel

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Code completion in comment pane and Pillar
by Peter Uhnak Sept. 30, 2015

Sept. 30, 2015

Hi, Some time ago I ran into a problem with typing left brackets into comment pane. As you know, code blocks in Pillar are marked with [[[ However comment pane is subject to regular code completion of NECController, which means that every time I type '[' NEC converts it into '[ ]'. So if I type '[[[' then I get '[ [ [ ] ] ]'. Which is good in code, but not here. Now considering we are pushing for Pillar in comments I think this should be resolved. However I don't know how. a) disable code completion for comments (trivial, but loosing CC b) subclass NECController to disable this. This is probably lot more complex, because the current one is hard-wired via Smalltalk tools c) add configuration option to NECControler so it can run in different modes (still a lot of work) d) add setting to options to disable/enable CC in comments and let users decide. d) other better, faster, easier solution? >From future perspective b) could be used to provide more extensive code completion, specifically for Pillar. Thanks, Peter

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