December 2019 - Pharo-users

Re: [Pharo-users] can I write this without the three if then;s

by tbrunz

I would probably set up an array of associations whose keys are the boundary limits and whose values are the target values (ordered, in this example, from outer to inner). Then loop over the array's associations using inject:into:, testing for the point where (each < key), at which point you return the previous association's value. -t -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Dec. 27, 2019

Re: [Pharo-users] can I write this without the three if then;s

by Roelof Wobben

Dec. 27, 2019

Re: [Pharo-users] can I write this without the three if then;s

by Kasper Ãsterbye

Hi First, I think your code is readable and easy to understand. I think the problem does not lend itself too much towards having âan object oriented solutionâ, as such. If you are looking for a one-liner using smalltalk libraries, you could do: ({10 -> 0. 5 -> 1. 1 -> 5. 0 -> 10} detect: [ :dist | dist key < distance ]) value but I really think your code is easier to read, which is what I appreciate the most. Best, Kasper On 27 December 2019 at 20.18.38, Roelof Wobben via Pharo-users ( pharo-users(a)lists.pharo.org) wrote: Hello, Im trying to solve a challenge from exercism where I have to calculate the points somehow gets on a very simple darts board. I solved it like this : scoreX: anInteger y: anInteger2 | distance | distance := (anInteger squared + anInteger2 squared) sqrt. distance > 10 ifTrue: [ ^ 0 ]. distance > 5 ifTrue: [ ^ 1 ]. distance > 1 ifTrue: [ ^ 5 ]. ^ 10 but now I use three if then and I think it's ugly code. Is there a way I can make it more the smalltalk way ? Regards, Roelof

Dec. 27, 2019

Re: [Pharo-users] can I write this without the three if then;s

by tbrunz

You might try Magnitude >> between: min and: max -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Dec. 27, 2019

Re: [Pharo-users] can I write this without the three if then;s

by Roelof Wobben

Thanks, But it looks to me I still need the ifTrue because the between gives also a true or false. Roelof Op 27-12-2019 om 20:38 schreef tbrunz: > You might try Magnitude >> between: min and: max > > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > >

Dec. 27, 2019

can I write this without the three if then;s

by Roelof Wobben

Dec. 27, 2019

Re: [Pharo-users] Namespaces (was Re: Behold Pharo: The Modern Smalltalk)

by Torsten Bergmann

To clarify: I was never was for the dot and always favoured the :: notation for namespaced classes. With that one one could create classes like: Seaside::Component Core::Boolean Model::Person GLM::BrickListModel Tx::FontAttribute (see my post on http://forum.world.st/Separator-in-class-names-td4926162.html from 2016). I know this from SmalltalkMT system and it worked nicely. Anyhow: Namespace discussion pop up each year - often in December and mostly because we still not have them ;) The oldest reference you can find is from 2010: http://www.jarober.com/blog/blogView?entry=3462762798 mentioning a Google summer of code project. Then GermÃ¡n Leiva demonstrates this Namespaces project in Pharo https://www.youtube.com/watch?v=n4I7fSVNX2A then it was declared dead: http://lists.pharo.org/pipermail/pharo-dev_lists.pharo.org/2012-June/066765… Then there was a discussion from 2012: http://forum.world.st/Pharo-and-Namespaces-td4636635.html and one in 2016 http://forum.world.st/Separator-in-class-names-td4926162.html Having proper namespaces would avoid such strange things as in https://github.com/pharo-spec/Spec/issues/813 and solve many other issues (but introduce new ones as well). But as always it is a question of time and resources. It's not only about introducing the namespaces itself - it would also mean to change the tools to support them. With Pharo 8 now more experiments are possible into bootstrapping an own Pharo (possibly with Namespaces): 1. One can bootstrap an own image / have it's own personal "Pharo" using Bootstrap to do experiments https://github.com/pharo-project/pharo/tree/Pharo8.0/bootstrap https://rmod.inria.fr/archives/papers/Poli15a-Onward-Bootstrapping.pdf 2. A class now knows about its environment environment "Return the environment in which the receiver is visible" ^Smalltalk globals and OpalCompiler supports an environment in the CompilationContext. So basically you can compile into a second environment withing the existing running image. 3. There is an experiment on modules called Metalo: https://github.com/guillep/metalo According to what Stef wrote on Discord in #bootstrap channel: "The idea is that we want to be able to edit dynamically module (package + namespace) without for example having to remove a full hierarchy of classes when just we change an import statement in a module. Our goal is to split Smalltalk globals into multiple namespaces one per module." "Metalo includes also supports for editing module, bootstrapping a kernel with modules and new class definitions." Dont know about its state. 4. There is a tool called "Candle" to help you bootstrapping own images: https://github.com/carolahp/pharo/tree/candle so one could bootstrap an own kernel with namespace support or other. Bye T. > Gesendet: Montag, 23. Dezember 2019 um 01:18 Uhr > Von: "Esteban Maringolo" <emaringolo(a)gmail.com> > An: "Any question about pharo is welcome" <pharo-users(a)lists.pharo.org> > Betreff: Re: [Pharo-users] Namespaces (was Re: Behold Pharo: The Modern Smalltalk) > > There are two uses for namespacing: > 1. Avoiding class name collisions between different packages > 2. Modularization > > I don't have the use cases for 2, but Torsten had an idea to support > the dot in the class name, that'd solve the problem 1. (e.g. > Chronology.Date and YourPackage.Date). > > Esteban A. Maringolo > > On Sun, Dec 22, 2019 at 8:57 AM ponyatov <dponyatov(a)gmail.com> wrote: > > > > What is the modern state of namespaces support? Maybe in Pharo 8 (or 9) > > > > I'm going to model some generic async Smalltalk in Pharo, package-bounded > > namespaces can save me from prefixing every class name. > > > > > > > > -- > > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > > > >

Dec. 24, 2019

Re: [Pharo-users] High CPU use idling

by Esteban Maringolo

I did a few extra things to detect the anomaly and I found that this happens mostly when running on battery (with CPU throttling). The CPU use gets more intense the more power friendly the power scheme is. I created an issue with a linked video because this might be happening only with VirtualBox or some weird combination. https://github.com/pharo-project/pharo/issues/5417 Regards, Esteban A. Maringolo On Mon, Dec 23, 2019 at 6:27 PM Esteban Maringolo <emaringolo(a)gmail.com> wrote: > > I constantly find Pharo eating the CPU of the VM, from 25% on idle to > 100%, which of course heats up any laptop. > > The Pharo Process monitor doesn't show anything unusual, but I cannot > tell from that tool if some process is the culprit. > > How can I know what is eating the CPU? > Is there a way to kill all the unnecessary process and respawn the needed ones? > > I run Pharo 7 within a VirtualBox VM with Lubuntu on a Windows 10 host. > But the CPU issue happens only with Pharo. > > Regards, > > Image: Pharo-7.0.3+build.164.sha.591a635c8922e5f1cff1d0b3fbf2e525b590d25f > (64 Bit) > Vm: /lib/pharo/5.0-201901051900/pharo (downloaded by PharoLauncher) > > Esteban A. Maringolo

Dec. 24, 2019

High CPU use idling

by Esteban Maringolo

I constantly find Pharo eating the CPU of the VM, from 25% on idle to 100%, which of course heats up any laptop. The Pharo Process monitor doesn't show anything unusual, but I cannot tell from that tool if some process is the culprit. How can I know what is eating the CPU? Is there a way to kill all the unnecessary process and respawn the needed ones? I run Pharo 7 within a VirtualBox VM with Lubuntu on a Windows 10 host. But the CPU issue happens only with Pharo. Regards, Image: Pharo-7.0.3+build.164.sha.591a635c8922e5f1cff1d0b3fbf2e525b590d25f (64 Bit) Vm: /lib/pharo/5.0-201901051900/pharo (downloaded by PharoLauncher) Esteban A. Maringolo

Dec. 23, 2019

Re: [Pharo-users] NeoCSV with numerous fields

by Hilaire

There is no header. I think it is a non-standard case. Thanks for the suggestion. Le 22/12/2019 Ã 18:44, Paul DeBruicker a Ã©critÂ : > Is there a header row? IF so you can do: > > csv := (NeoCSVReader on: stream) separator: Character tab. > header:= csv readHeader. > header size timesRepeat:[csv addFloatField]. > csv upToEnd inspect -- Dr. Geo http://drgeo.eu

Dec. 23, 2019