August 2019 - Pharo-users - lists.pharo.org

SequenceableCollection>>#allButFirst: inconsistence across subclasses
by Julien Sept. 5, 2019

Sept. 5, 2019

Hello, I opened that issue: https://github.com/pharo-project/pharo/issues/4442 <https://github.com/pharo-project/pharo/issues/4442> And I think to fix it we need to actually discuss about what we want. #allButFirst: behaves differently depending on the actual type of sequenceable collection when argument is greater than collection size. For instance: #(1 2) allButFirst: 3. "PrimitiveFailed signaled" (LinkedList with: 1 with: 2) allButFirst: 3. "PrimitiveFailed signaled" (OrderedCollection with: 1 with: 2) allButFirst: 3. "an OrderedCollection() Â» The question is then, who is right? Should #allButFirst: with an argument greater than the collection size raise an error Or Should #allButFirst: with an argument greater than the collection size returns an empty collection ? I asked a few people about it @ ESUG and it appears that the expected behaviour from #allButFirst: is not the same to all people. We need to decide so we improve consistence of collections. And then, we need to document that with a test :-). Cheers. Julien --- Julien Delplanque Doctorant Ã lâUniversitÃ© de Lille http://juliendelplanque.be/phd.html Equipe Rmod, Inria BÃ¢timent B 40, Avenue Halley 59650 Villeneuve d'Ascq NumÃ©ro de tÃ©lÃ©phone: +333 59 35 86 40

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Connection Timed Out
by Richard Kenneth Eng Sept. 4, 2019

Sept. 4, 2019

I have a Teapot application running under Linux and nginx. From time to time, I get the following error: *ConnectionTimedOut: Data receive timed out.* Otherwise, the Teapot application works fine, even with this error message. Can anyone tell me what or where it's timing out, and how can I change the timeout value? Thanks.

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Exercism - creating fresh image with previously submitted exercises
by DavidBajger Sept. 3, 2019

Sept. 3, 2019

Hi Tim & Pharo Exercism contributors!I had a chance to come back to my exercism challenges and tried to create new image for continuing on solutions. I've tried to load manually previously submitted/completed exercises into fresh image (with Exercism loaded) and found few issues. Here is my list: */Batch loading/* 1) It would be great to have menu item to "Batch load already submitted exercises", so I should create issue on Github for this enhancement, right? */Renamed exercises/* 2) I faced few challenges when loading my already posted exercises and one of them was renamed package and class. My old solution was in different package and class was named differently too, so I had to rename class with solution to new name, so the tests would be green again. I had to move class to new package as well. Examples are: ResistorColorDuo(new class name) <-> ResistorColors (old)MatchingBrackets(new class name) <-> BracketPush(old)Is there a way, to have some migration mechanism as part of loading the exercise into image, which would rename class (and package) automatically and resubmit solution again? */Loading subclasses with missing references to superclass/* 3) Some of my solutions are using more classes and sub-classes, for some reason loading such exercise failed, because it tried to load subclass first without having superclass loaded. So workaround for this was to create superclass as stub manually and load exercise again. I had to move classes to correct package, but somehow I struggle to understand what is really right package name (screenshots below). <http://forum.world.st/file/t371519/2019-08-29_10_48_51-Clipboard.png> <http://forum.world.st/file/t371519/2019-08-29_bowling_error_class_missing.p…> <http://forum.world.st/file/t371519/2019-08-30_package_exercism_or_exercise.…> */Exercises in independent packages /* 4) Old way of organizing Exercism exercises was using package extension of package Exercism, which I found a bit more well-arranged than using package for each exercise. Is there a reason for having each exercise in standalone package? I guess there is a good reason for that. <http://forum.world.st/file/t371519/2019-08-30_package_extensions.png> <http://forum.world.st/file/t371519/2019-08-30-exercism-packages.png> *Thanks for your insights!* David ----- David Bajger -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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VW vs Pharo Performance
by Richard Kenneth Eng Sept. 1, 2019

Sept. 1, 2019

https://benchmarksgame-team.pages.debian.net/benchmarksgame/fastest/vw-phar… Is VisualWorks really faster than Pharo? Why???

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how to open a system browser on a environment?
by Bernardo Ezequiel Contreras Aug. 30, 2019

Aug. 30, 2019

hi, i used to open a system browser with an environment i built the following environment earleyEnvironment | packageNames | packageNames := OrderedCollection with: BaselineOfEarleyParser package packageName. packageNames addAll: (BaselineOfEarleyParser project version packages collect: [ :each | each name ]). ^ (RBBrowserEnvironment new forPackageNames: packageNames) label: 'Earley Parser Environment'; yourself and then i opent the system browser with it "protocol: environment" openBrowserInEarleyEnvironment ^ (Smalltalk tools browser browsedEnvironment: self earleyEnvironment) open now, i dont know how to do it with the new browser. any hints? suggestions? thanks. -- Bernardo E.C. Sent from a cheap desktop computer in South America.

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[ANN] Iterators
by Julien Aug. 25, 2019

Aug. 25, 2019

Hello, I wanted to have an iterator framework for Pharo for a long time. So I started building it step by step and today I think that, while it still requires more documentation, it is ready to be announced and used by others. I present you Iterators : https://github.com/juliendelplanque/Iterators <https://github.com/juliendelplanque/Iterators> The idea is that, as described by the iterator design pattern, any object that needs to be walked provides one or many iterators. In the library, #iterator method is the convention to get the default iterator of any object (if it has one). Iterators provides a DSL to deal with iterators combination. It is inspired from shellâs streams manipulation syntax: - The pipe "|" allows one to chain iterators - The ">" allows one to create a new collection with data transformed through chained iterators - The ">>" allows one to fill an existing collection with data transformed through chained iterators For example, one can write: iterator := #(1 2 3) iterator. iterator | [ :x | x * 2 ] collectIt | [ :x :y | x + y ] reduceIt > Array "#(12)" Or iterator := #(1 2 3) iterator. collectionToFill := OrderedCollection new. iterator | [ :x | x * 2 ] collectIt | [ :x :y | x + y ] reduceIt > collectionToFill. collectionToFill "anOrderedCollection(12)" The equivalent of "/dev/null" in Linux also exists: iterator := #(1 2 3) iterator. iterator | [ :x | x * 2 ] collectIt | [ :object | object logCr ] doIt "Just print incoming objects in transcript." > NullAddableObject "Special object that ignore incoming objects." There are documentation and examples on the GitHub repository. â Initially, the goal was to avoid to duplicate all collectionâs iterator methods (e.g. #collect:, #select:, etc) in composite objects. Thus, it provides an IteratorWithCollectionAPI which wrap an iterator and provides all the methods we want (#collect:, #select:, â¦). Via IteratorWithCollectionAPI, your objects automatically gets the Collection API, you just need to access it via #iterator message: myObject iterator select: [ :x | x isFoo ] This is another way to use the framework, just to avoid code duplication. â Future work is to provide the possibility to have iterator with multiple inputs. I already have an undocumented prototype on the repository that works like this: it1 := (1 to: 10) iterator. it2 := (1 to: 10) iterator. it1 & it2 | [ :x :y | x@y ] mergeIt > Array. "{(1@1). (2@2). (3@3). (4@4). (5@5). (6@6). (7@7). (8@8). (9@9). (10@10)}" Yes, "&" operator will again kind of mimic the one from the shell. â Hope it helps other people. Feedback is welcome. Cheers, Julien --- Julien Delplanque Doctorant Ã lâUniversitÃ© de Lille http://juliendelplanque.be/phd.html Equipe Rmod, Inria BÃ¢timent B 40, Avenue Halley 59650 Villeneuve d'Ascq NumÃ©ro de tÃ©lÃ©phone: +333 59 35 86 40

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Putting checkboxes in ListPresenter
by Steve Quezadas Aug. 25, 2019

Aug. 25, 2019

Guys, I am learning this new "spec" thing. I created a simple Spec "list" object with the following code: arbitraryList := ListPresenter new. arbitraryList items: #('one' 'two' 'three' 'four. . .'); title: 'Arbitrary list'. arbitraryList openWithSpec. Which creates a simple list like follows: https://steverstuff.s3.amazonaws.com/arbitrary_list.png Is there any way to make a SpecPresenter object with an arbitrary list of checkboxes? Kind of like a check-off list? What is the best way of doing this? Should I put checkbox objects in the "items:" selector? Or is there another way to do it? Please forgive the naive question.

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Finding replacements for deprecated functions
by Steve Quezadas Aug. 24, 2019

Aug. 24, 2019

I am experimenting with smalltalk. Sometimes a function gets deprecated and is crossed out. Is there a "smalltalk way" of finding the equivalent replacement function?

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[ANN] pre-release voyage 1.6
by Norbert Hartl Aug. 23, 2019

Aug. 23, 2019

I made a pre-release for voyage 1.6 at https://github.com/pharo-nosql/voyage/releases/tag/1.6 <https://github.com/pharo-nosql/voyage/releases/tag/1.6> It enables to usage in pharo8. Also included is a first preview of using ArangoDB [1] with voyage [1] https://www.arangodb.com <https://www.arangodb.com/> Norbert

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[ANN] mongotalk 1.19
by Norbert Hartl Aug. 23, 2019

Aug. 23, 2019

Pharo8 is enabled and added to travis. Grease depedency has been updated to v1.4.3 FYI, Norbert

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