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Problems with NeoCSV Package
by William L. Cleveland Nov. 27, 2018

Nov. 27, 2018

I need to manually tag a large number of sentences choosing between a small, fixed number of short strings as tags for each sentence. I would like to do this with a Pharo GUI that displays sentences one at a time and permit choice of tags using radio buttons. The results need to be saved as a CSV file on the hard drive for further manipulations with python. As a first step, I used Excel to create a test CSV file with two sentences that was saved on the disk drive in the Pharo working directory. I have subsequently tried to import the sentences into Pharo 6.1 32 bit stable. This was done as follows. |workingDir reader result| workingDir := FileSystem disk workingDirectory. myFileName := 'MoonCSV.csv'. stream := workingDir/myFileName readStreamDo: [ :stream | stream contents]. reader := (NeoCSVReader new) separator: Character cr. The separator was changed from a comma to a cr because the inspector showed a cr, not a comma separating the two imported sentences. result := (reader on: stream). result upToEnd. This failed with the following error: Instance of ByteString doesnât understand #atEnd. I donât see how to proceed further. Also I am not clear on the best way to export the sentence and tags to the disk drive.. Any help would be appreciated. Lou Cleveland

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Re: [Pharo-users] Do you have Pharo + SQLite experience?
by Offray Vladimir Luna CÃ¡rdenas Nov. 27, 2018

Nov. 27, 2018

Hi Juraj I used UDBC, that is documented in the blog referred by Sven. You can find a Pharo project that uses it at [1] [1] https://mutabit.com/offray/blog/en/entry/panama-papers-1 Cheers, Offray On 27/11/18 8:09, Juraj Kubelka via Pharo-users wrote:

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Re: [Pharo-users] Do you have Pharo + SQLite experience?
by Sven Van Caekenberghe Nov. 27, 2018

Nov. 27, 2018

http://www.samadhiweb.com/tags/SQLite > On 27 Nov 2018, at 13:16, Juraj Kubelka via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > From: Juraj Kubelka <juraj.kubelka(a)icloud.com> > Subject: Do you have Pharo + SQLite experience? > Date: 27 November 2018 at 13:16:00 GMT+1 > To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> > > > Hi all, > > I would like to play with SQLite using Pharo. Does anyone use SQLite in Pharo (version 7)? > What library is recommended to use? And what is your experience (pros and cons) of the existing solutions? > Do you have a project using SQLite in Pharo that I can download and look at it? > > Thank you, > Juraj > > > >

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Do you have Pharo + SQLite experience?
by Juraj Kubelka Nov. 27, 2018

Nov. 27, 2018

Hi all, I would like to play with SQLite using Pharo. Does anyone use SQLite in Pharo (version 7)? What library is recommended to use? And what is your experience (pros and cons) of the existing solutions? Do you have a project using SQLite in Pharo that I can download and look at it? Thank you, Juraj

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Tracking method in and out with MetaLinks
by Manuel Leuenberger Nov. 27, 2018

Nov. 27, 2018

Hi, I stumbled upon another MetaLink scenario that I am unsure how to implement. I want to track method invocations, with receiver, arguments, selector, and return value (maybe even signaled exception). I can track the method input with a MetaLink installed on an RBMethodNode like this: MetaLink new metaObject: [ :c | Transcript show: c receiver; show: c method selector; show: c arguments; cr ]; selector: #value:; arguments: #(context). and for returns with a MetaLink on RBReturnNodes like this: MetaLink new metaObject: [ :v | Transcript show: v; cr ]; selector: #value:; arguments: #(value) The problem is though, that not all methods have explicit returns, and some mix explicit returns and self returns. I tried installed an #after MetaLink on a RBMethodNode, but this fails in many cases. Is there any way that I can instrument a method and track receiver, selector, arguments, and returned value (even if self) at the same time? Cheers, Manuel

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Re: [Pharo-users] question about FFI
by Esteban Lorenzano Nov. 26, 2018

Nov. 26, 2018

> On 26 Nov 2018, at 11:14, Henrik Sperre Johansen via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > From: Henrik Sperre Johansen <henrik.s.johansen(a)veloxit.no> > Subject: Re: question about FFI > Date: 26 November 2018 at 11:14:26 CET > To: pharo-users(a)lists.pharo.org > > > Yuriy Babah wrote >> in Playground i'm doing: > * >> #(2 3) doWithIndex: [:each :i | xm at: i put: each]. >> #(3 4) doWithIndex: [:each :i | ym at: i put: each]. > * >> >> whot i'm doing wrong? > > So, you're putting 2 at index 2 of xm, and then writing 3 past end of array, > and in ym you're putting 3 and 4 at offsets past the end of array? > > It's a wonder your image didn't crash, rather than return interpolation of > the uninitialized valuesâ¦ He is not doing that. He is using #doWithIndex: So he is passing 2 at index 1 and 3 at index 2, then 3 at index 1 and 4 at index 2. Esteban > > Cheers, > Henry > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > > >

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question about FFI
by Yuriy Babah Nov. 26, 2018

Nov. 26, 2018

Hi ! I'm trying to call a very simple function from C ++ lib, writed for the test. function with prototype: extern "C" float interpolationFunc(float* xm, float* ym, int size, float x). In Pharo7 wrote: FFIExamples class >> interpolationFunc_xm: xM ym: yM size: size x: x ^ self ffiCall: #(float interpolationFunc #(float * xM , float * yM , int size , float x)) module: 'libinterpolationLib.so' in Playground i'm doing: xm := FFIExternalArray externalNewType: 'float' size: 2. ym := xm clone. #(2 3) doWithIndex: [:each :i | xm at: i put: each]. #(3 4) doWithIndex: [:each :i | ym at: i put: each]. FFIExamples interpolationFunc_xm: xm pointer ym: ym pointer size: 2 x: 2.5 . last expression returninÐ¿ me 0.0, but right is 3.5. I'm dit the same in Python3 ctypes, and there work's fine. In UnifiedFFI booklet is absent chapter "Arrays", anybody may help with whot i'm doing wrong?

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Re: [Pharo-users] My Keynote at the Salta Conference
by Offray Vladimir Luna CÃ¡rdenas Nov. 25, 2018

Nov. 25, 2018

Hi, Thanks for your positive and critical comments, as usual Ben. Richard I think that is important to listen to a community when reaching to it (I remember a talk we had where I suggested an approach closer to anthropology instead of marketing). Many of us value your contributions, despite of approaching them in a critical way. For example, I think that promotion is important, but popularity is not, and the later is not a proper measure of the effectivity of the former. As a Latin American (that means people born and rise Latino America, not Latinos living in United States) for me is really alien the North American people (that means people living in the North region of the American continent that goes from Alaska to Patagonia and beyond) is kind of obsessed with popularity, competition, winning and losing, at least for what popular media depicts (even seems that loser is kind of a big insult over there). I don't think that winning a competition is the best way of making a younger become part of collaborative open community. Also, in an interconnected world, I feel more inclined to volunteer my time helping a young person from the Global South to become part of the Pharo/Smalltalk community that to volunteer my time for a pretty localized competence in a particular place of the Global North. That being said, I think that little money can help a lot (specially in the Global South) and I like the idea of making young people interested in the offerings that Smalltalk has. The average FLOSS project has a media of one developer [1], so even winning one more after the competition is a big win. But I would try to volunteer my time in something that brings the gap between Pharo communities and young people and between the Global North and the Global South, specifically in my Pharo powered project, Grafoscopio. [1] https://mako.cc/writing/hill-when_free_software_isnt_better.html So I'm glad that you are open to suggestions. Here come mine about how this could be done, but this may also become something totally different of your actual proposal, but, hopefully, also more global, interesting, long lasting and a middle point between your promotional efforts and the activities of this community. # The Smalltalk Global Campfire Is an immersive inclusive global experience where new people (regardless of age, ethnicity or gender) can participate in a Smalltalk powered project and get mentorship from community members and start a long lasting relationship with a powerful technology, Smalltalk, and the friendly communities around it. ## How it will work Seasoned global Smalltalkers will propose a "tent", which is a set of related campfire projects (one or many) directed towards newbies, related with programming and coding, but also connected them with other activities which recognize that people comes from different backgrounds, have different interests and that an inclusive tech community is more than code[2]. The projects will allow newbies to learn coding, but also to express and connect it with wider concerns (documentation, civic tech, entrepreneurship, gaming, learning, etc). [2] https://morethancode.cc/about/ Interested campers will find the different tents where they can join and the tent leader will prepare a set of (increasingly complex?) activities for the members of the tent. Campers will work in the activities on a weekly basis and setup and open source code repository for working together. Coordination language for the Global Campfire will be English for tent leaders, but campers can use native language for communication between them and for some activities (local documentation, translations) as we don't want to impose a unique language to become part of a community and we recognize active Smalltalkers from around the world that can help local communities, made them stronger and better connected. ## Tent medals Becoming part of a open collaborative community is mostly about being able to help each other and how you and the community create value for each other. So while this is not a competition, we recognize that small money can be an important incentive to keep communities dynamic. At the end of the Campfire the community will provide with Member Badges and Tent Medals which recognize the work done by all the participants and also will give a small money incentive for the tent that made the best work, so the tent can decide how to spend it better. The evaluation will be done for each Tent leader, and also two external judges. The Tent Medals will be: * 1 Gold Medal: XXX Dollars. * 1 Silver Medal: XYZ Dollars. * 1 Bronze Medal: ABC Dollars. ## Closing I really don't know about the details here: How do we assign the prices? There is any better place that the one referred at [2] to showcase the important of going beyond code in tech communities? What is the proper duration for the Campfire? This is just a draft, but I think that this is something I would like to volunteer for and serves better the need for new people in our community, and can be also addressed from our local context and particular projects while connecting more the global community. On 21/11/18 10:23, Ben Coman via Pharo-users wrote:

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how do I send the 2 messsages to the function
by Roelof Wobben Nov. 25, 2018

Nov. 25, 2018

Hello, I have made this function : calculateNewFloor: aFloor index: index Â Â Â "comment stating purpose of message" Â Â |action floor | Â Â action:= SantaAction getActionFor: aFloor. floor := action doMovementFor: aFloor now I want to send a message to this functionÂ : findBasement: input2 Â Â Â "solution to part1 of this challenge" Â Â Â Â input2 withIndexDo: [ :element :index | |action| action:= SantaFloorAction getActionFor: element. floor := action calculateNewFloor: floor ..Â ]. Â Â Â Â ^ counter but how do I get the second argument in this Roelof

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Questions about NewValueHolder and Model
by dorellang Nov. 25, 2018

Nov. 25, 2018

Hi everyone! I was trying to find out how to propagate changes through widgets in the Spec UI framework, and so far it seems to me that using NewValueHolder objects is the most proper way right now. Am I wrong? However I have some questions regarding this class: (BTW I am using a Pharo 7 image) First, you may notice that NewValueHolder extends the Model class, whose class comment simply says "Provides optimized model support". The first thing I thought coming from a non-Smalltalk background was like "What is that supposed to mean?". Then I tried to make sense of it, but you know, this has been hard because Model has a lot of methods that aren't too related IMHO. For instance let's take all the methods under the 'stepping' and 'stepping-window' protocols ...what are they intended to do? After doing some research I think they are some kind of mechanism from the Morphic framework to setup actions that will be performed periodically, probably for supporting animations or something, but what does this have to do with being a Model anyway? All of this has been pretty confusing, but I think I've understood it better after reading this post about Smalltalk MVC: http://peter.michaux.ca/articles/smalltalk-mvc-translated-to-javascript . I know this may be a bit obvious for veteran Smalltalkers, but now it has become clearer to me that this Model class is the M of the MVC framework that was used in ye olden days to build Smalltalk UIs. Which is weird because as far as I know MVC doesn't exist in Pharo. So I asked myself: "Shouldn't this be killed? Why is it kept? (at least it should be cleaned up I think)". And after searching the references and senders of the methods I think it mostly comes down to Morphs. Is it feasible to clean this up? I think all of this should be explicitely documented at least, you know, all this Model API. Currently it's too implicit, not friendly for newcomers and too mixed up with random Morphic stuff (which should be dying soon anyway). Some other thing that bothers me it's that that most of the methods in Model are defined in Object too. I understand that that was made in the original MVC to have the ability to use anything as a Model, but I don't think that's necessarily the best option. It would be cleaner perhaps to have an asModel message which creates a ProxyModel object which implements all the Model API methods and then proxies the rest to the underlying instance; or maybe a more pragmatic approach would be like moving all these Model methods in object to an extension protocol; or ...hey, it's 2018! Today we have traits, we could create a Trait with all those methods and then just let the current Model class use it. That's are my thoughts about the Model class. Now I'm not an expert, so they should be taken with a grain of salt ;) Coming back to the NewValueHolder, other two issues came to my mind: - What's the deal with the old ValueHolder class? Apparently it's not used anywhere. I think it should be removed, and NewValueHolder should be renamed to ValueHolder. - Some messages of NewValueHolder are also in the Model class in the 'announcing' protocol... What's the point of this polymorphism? This is not like the classical Model API at all, which uses the dependents and updating protocols. All these methods under the 'announcing' protocol use a totally unrelated way of propagating changes. This breaks SRP, shouldn't we have instead like a NewModel class which uses this new Announcement-based mechanism for propagating changes and don't conflate the two things? - In the same fashion, I don't think there isn't any good reason for having the NewValueHolder as a Model subclass; at least the Model that implements the behavior from the old MVC framework. For the record in my image I've done 'Object subclass: #NewValueHolder (...)', copied all the announcing methods to NewValueHolder and added an announcer instance variable and it's going fine so far, but that might be because all Objects can be used as models in the MVC sense. Anyway, after some use 'Object classVariableNamed: #DependentsFields' still prints "#DependentsFields->a WeakIdentityKeyDictionary()" :P I think that's it, or maybe I forgot something I don't know haha -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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