- Pharo-users - lists.pharo.org

Pharo 8 - OSProcess or OSSubProcess or ?

by PAUL DEBRUICKER

Hi - What is the recommended way to run a shell command from Pharo 8 and get the output from stdout into the image? Thanks Paul

May 4, 2020

Re: [Pharo-users] MetaLinks for Dynamic Contracts

by Ben Coman

On Mon, 4 May 2020 at 05:19, Evan Donahue <emdonahu(a)gmail.com> wrote: > Hello, > > I am returning to some work in Pharo after about ~2.5 years and reminding > myself of what I was working on before I got sidetracked. It appears > > I had mostly finished for release a dynamic contracts library for run time > type checking based on Racket's contract library.[1] However, it relied on > some hackery to interact well with the TestCoverage class, since both the > contract and the TestCoverage wanted to replace the method during the run > of a test. However, since it seems in Pharo 8 the TestCoverage class is no > longer present, this seems like a good time to re-evaluate the project > before I go in to see what needs to be patched up. I therefore have three > questions: > > 1) Are there now any existing libraries for dynamic contracts that I > should use instead of patching my old library? > > 2) Is MetaLinks the preferred way to intercept messages, > > and if so can someone point me to the repo (I can't seem to find it on > Github)? > There is no repo for MetaLinks. It comes batteries installed. (i.e. its in the image) cheers -ben

May 4, 2020

Re: [Pharo-users] mentor question 4

by Trygve Reenskaug

*Â A coding experiment.* Consider a Scrum development environment. Every programming team has an end user as a member. The team's task is to code a credit card validity check. A first goal is that the user representative shall read the code and agree that it is a correct rendering of their code checker: Â Â Â luhnTest: trialNumber Â Â Â Â Â Â | s1 odd s2 even charValue reverse | ----------------------------------------------- /" Luhn test according to Rosetta" "Reverse the order of the digits in the number."/ Â Â Â reverse := trialNumber reversed. /"Take the first, third, ... and every other odd digit in the reversed digits and sum them to form the partial sum s1"/ Â Â Â s1 := 0. Â Â Â odd := true. Â Â Â reverse do: Â Â Â Â Â Â [:char | Â Â Â Â Â Â Â Â Â odd Â Â Â Â Â Â Â Â Â Â Â Â ifTrue: [ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â s1 := s1 + char digitValue. Â Â Â Â Â Â Â Â Â Â Â Â ]. Â Â Â Â Â Â Â Â Â Â Â Â odd := odd not Â Â Â Â Â Â ]. /"Taking the second, fourth ... and every other even digit in the reversed digits: Multiply each digit by two and sum the digits if the answer is greater than nine to form partial sums for the even digits" Â Â Â "The subtracting 9 gives the same answer. " "Sum the partial sums of the even digits to form s2"/ Â Â Â s2 := 0. Â Â Â even := false. Â Â Â reverse do: Â Â Â Â Â Â [:char | Â Â Â Â Â Â Â Â Â even Â Â Â Â Â Â Â Â Â Â Â Â ifTrue: [ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â charValue := char digitValue * 2. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â charValue > 9 ifTrue: [charValue := charValue - 9]. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â s2 := s2 + charValue Â Â Â Â Â Â Â Â Â Â Â Â ]. Â Â Â Â Â Â Â Â Â Â Â Â even := even not Â Â Â Â Â Â ]. /"If s1 + s2 ends in zero then the original number is in the form of a valid credit card number as verified by the Luhn test."/ Â Â Â ^(s1 + s2) asString last = $0 --------------------------------- Once this step is completed, the next step will be to make the code right without altering the algorithm (refactoring). The result should be readable and follow the team's conventions. P.S. code attached.

May 4, 2020

[ANN] Willow-Bootstrap v12.0.0 [v12.0.0] released!

by Buenos Aires Smalltalk

May 4, 2020

ANN - Techtalk - Pharo Status May 2020

by tesonep＠gmail.com

Techtalk: Pharo Status May 2020 Abstract: Pharo is moving fast, and sometimes it looks it is doing it in a chaotic way. However, we have a plan and a lot of things that we have accomplished in the past months. The idea of this talk is to present what has been done, where we are, and what are the things that we are working on. The idea of this talk is to be an open talk, where we can share the state but also listen to different ideas about what is important for the community. For so, I am attaching a presentation with the detail of the status, so we can start from it the conversation. When: Wednesday 6th May, 17h00 Paris Time / 15h00 UTC Where: #Techtalk channel in Pharo Discord Server. -- Pablo Tesone. tesonep(a)gmail.com

May 4, 2020

Re: [Pharo-users] New type of web application using HTML, CSS and Smalltalk

by Konrad Hinsen

Hi Erik, > I have published my first demo of a new type of webapplication based on a > tiny Smalltalk image running in the browser, acting as the JS-engine. Create > a dynamic application using Smalltalk only, with the direct manipulation > you're familiar with from Smalltalk. And ...(in the near future)... with the > same debugging capabilities. Still work in progress, but hopefully providing > an idea of what's in store. That demo looks very interesting! If I understand your architecture correctly, you have a minimal image run in the browser, presumably using a virtual machine written in JavaScript. The in-browser Smalltalk talks to a server written in Pharo, which is the development environment for Web applications. That all looks good. What isn't clear to me is the autonomy of the in-browser system. Do you need the Pharo server only for development, or also for deployment of the final Web application? Konrad.

May 4, 2020

Re: [Pharo-users] MetaLinks for Dynamic Contracts

by Sven Van Caekenberghe

He Evan, Can't answer your questions, but the contracts concepts sounds interesting ! Sven > On 3 May 2020, at 23:18, Evan Donahue <emdonahu(a)gmail.com> wrote: > > Hello, > > I am returning to some work in Pharo after about ~2.5 years and reminding myself of what I was working on before I got sidetracked. It appears > > I had mostly finished for release a dynamic contracts library for run time type checking based on Racket's contract library.[1] However, it relied on some hackery to interact well with the TestCoverage class, since both the contract and the TestCoverage wanted to replace the method during the run of a test. However, since it seems in Pharo 8 the TestCoverage class is no longer present, this seems like a good time to re-evaluate the project before I go in to see what needs to be patched up. I therefore have three questions: > > 1) Are there now any existing libraries for dynamic contracts that I should use instead of patching my old library? > > 2) Is MetaLinks the preferred way to intercept messages, and if so can someone point me to the repo (I can't seem to find it on Github)? > > 3) If 2, does MetaLinks play well with whatever is the current TestCoverage alternative that I assume still does some form of message interception, e.g. will the test coverage function still work properly on a MetaLink'ed message, or will that require further hackery (I discovered MetaLinks after the first version, so I used the more basic message replacement apis)? > > Thank you, > Evan > > > [1] https://docs.racket-lang.org/reference/contracts.html

May 4, 2020

Re: [Pharo-users] [ANN] Pharo Compendium

by Torsten Bergmann

Yes - I was developing on P9 and never tried it in Pharo 8. But I checked now - seems to work without any problem there as well. Thx T. Gesendet:Â Sonntag, 03. Mai 2020 um 22:36 Uhr Von:Â "StÃ©phane Ducasse" <stephane.ducasse(a)inria.fr> An:Â "Any question about pharo is welcome" <pharo-users(a)lists.pharo.org> Betreff:Â Re: [Pharo-users] [ANN] Pharo Compendium It can probably work in P8 because parts of Spec20 are working in P8 but not all the features and widgets like tables and others.Â But torsten will tell us.Â Â On 3 May 2020, at 17:34, Esteban Maringolo <emaringolo@gmail.com[mailto:emaringolo@gmail.com]> wrote:Â Excellent Torsten! I guess it will not work in Pharo 8 because of the Spec 2 requirement. Right? Regards! Esteban A. Maringolo

May 3, 2020

MetaLinks for Dynamic Contracts

by Evan Donahue

Hello, I am returning to some work in Pharo after about ~2.5 years and reminding myself of what I was working on before I got sidetracked. It appears I had mostly finished for release a dynamic contracts library for run time type checking based on Racket's contract library.[1] However, it relied on some hackery to interact well with the TestCoverage class, since both the contract and the TestCoverage wanted to replace the method during the run of a test. However, since it seems in Pharo 8 the TestCoverage class is no longer present, this seems like a good time to re-evaluate the project before I go in to see what needs to be patched up. I therefore have three questions: 1) Are there now any existing libraries for dynamic contracts that I should use instead of patching my old library? 2) Is MetaLinks the preferred way to intercept messages, and if so can someone point me to the repo (I can't seem to find it on Github)? 3) If 2, does MetaLinks play well with whatever is the current TestCoverage alternative that I assume still does some form of message interception, e.g. will the test coverage function still work properly on a MetaLink'ed message, or will that require further hackery (I discovered MetaLinks after the first version, so I used the more basic message replacement apis)? Thank you, Evan [1] https://docs.racket-lang.org/reference/contracts.html

May 3, 2020

Re: [Pharo-users] New type of web application using HTML, CSS and Smalltalk

by CÃ©drick BÃ©ler

Really great Erik. I just want to try ! ;-) This is great to see such practical and cool uses of small images. Itâs a long dream that seems happening. And of course, thanks to all people who made it possible, especially those who work on the bootstrap process and others in general (the list is too long). Exciting time in the Smalltalk world. Feels like Renaissance to me ;-) Cheers, Cedrick

May 3, 2020