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

Discord Server invite is now private because of spammer
by Dimitris Chloupis Jan. 5, 2019

Jan. 5, 2019

Hello people , as you may or may not be aware we have a spammer that posts links to sexual content sites. This is of course an unacceptable situation so I had to delete all existing invite links. This means that from now on I will not allow members to create their own invite links and I will also not allow more than one link to be active at a time so I know which link is compromised. The invite link will no longer be public but shared privately only by Admins to people who are already active here and it will be shared only through personal emails and messages. I have also raised the level of automatic moderation , from now on new members wont be able to post in our server unless they have a verified email with Discord. Also all messages are automatically scanned by Discord from now on for improper behavior. I am sorry for this inconvenience but its all part of having a very active community, it was just a matter of time till we attracted the attention of spammers. This does not affect our almost 1000 existing members on Discord server so if you already a member you have nothing to worry about. This affects only new people who like to join. If you are new and you like to join I will send you an invite link ONLY if you are active in this mailing list and after you are ask for one. You can use this thread by providing your Discord ID (you get this when you register with discord) and I will send you a personal message in Discord with an invite link. By active I mean that you have substantial participation in this mailing list which means at least 3 posts. If you are a member or admin and post the link publicly , its not a problem, but please be aware that if the link is compromised then I will delete it and create new making new members unable to join with the old one. So use the link wisely. You can also contact one of the other admins , if you know who they are and they know who you are. If you dont then use this thread and be patient. Once you join there are no restrictions or anything else that will make your life not easy. Happy Pharoing ;)

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Managing Code - Creating a Library/Package from scratch?
by Todd Blanchard Jan. 5, 2019

Jan. 5, 2019

The bit I always struggle with on various Smalltalk environments is the right way to manage code. It keeps changing. Which is fine. But I've been away for a bit and I'm lost now. I want to create a new package that can be loadable and lives in a git repo. I guess Metacello is part of that. And Iceberg. And...what else? I want to build a library but am no longer clear on what a library (or package I guess) definition is built from. Thanks.

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Re: [Pharo-users] Updating singletons
by Konrad Hinsen Jan. 4, 2019

Jan. 4, 2019

H Cyril, > Fetching, loading and post loads should leave a trace during the > execution in the Transcript. Thanks, that helps to confirm that my postload is never executed when I update a package + baseline in an image that already had an earlier version loaded. Nothing at all is shown in the Transcript. Reloading the package and/or the baseline package doesn't leave any trace either. And if I add a dependency, then update the package again, the new dependency is not loaded either. Hypothesis: baseline changes have no effect for already installed packages. When I load my modified package + baseline into a fresh image, lots of actions are shown in the Transcript, including the execution of my postload action. But in that situation, I don't actually need it. Cheers, Konrad.

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Re: [Pharo-users] Updating singletons
by Cyril Ferlicot D. Jan. 3, 2019

Jan. 3, 2019

Hello, Fetching, loading and post loads should leave a trace during the execution in the Transcript. For pre/post load it should have something like: Evaluated -> baseline [BaselineOfMyProject] >> selector This is the primary source of informations I use to debug baselines. -- Cyril Ferlicot https://ferlicot.fr

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Re: [Pharo-users] Is it possible to follow an object through a computation?
by Steven Costiou Jan. 3, 2019

Jan. 3, 2019

Hi, if you are using Pharo 7 I have some work on object-centric debugging that could do that, using Reflectivity. For example, with object-centric metalinks you could do the following: ##get your object (here are two instances of a trivial class which only has a "name" inst var) obj1 := MyClass new. obj2 := MyClass new. ##define a "halt" metalink: link := MetaLink new metaObject: Halt; selector: #now; control: #before. ##install the metalink on the instance variable "name" of the first object using the new Reflectivity API obj1 link: link toSlotNamed: #name. ##then the system only halts when you use a method accessing the "name" slot of this object, and not for other instances obj1 name: 'first name'. <-- halt obj2 name: 'second name' <-- no halt If you look at Object and Class classes, you will find a more detailed API to install metalinks on different structural entities and to scope them to objects. For example you can ask to halt only when a instance variable is read, or only when something is written in it (in the example above it does both). These metalinks are only available for Pharo 7 and must be loaded from https://github.com/StevenCostiou/Reflectivity-dev and you must override the current Reflectivity code (click "load" and not "merge"). Hopefully that will be integrated and merged in Pharo 7 or 8 soon. There is also that https://github.com/ClotildeToullec/Collectors/wiki which provides a history tool that stores all objects that went into an instance variable of an object (or even a temp var or a given expression). It uses the Reflectivity API mentionned above. However for now it is needed to provide a condition to scope the capture of objects to a specific instance (but it works well). This tool also gives you the stack for each modification of an instance variable. Objects are stored in memory though, so it can kill your image on too large program executions (that part is currently being investigated...). I do not have time right now to get into more details, but if you try any of it and have questions please ask. Steven.

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[Pharo MOOC] Object/Class Diagram generation
by sergio ruiz Jan. 3, 2019

Jan. 3, 2019

Hey, all. I was just wondering if anyone knew how the Pharo MOOC was creating their Object/Class Diagrams like so: Thanks! ---- peace, sergio photographer, journalist, visionary Public Key: http://bit.ly/29z9fG0 #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV http://www.codeandmusic.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

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Re: [Pharo-users] [Moose-dev] glamorous toolkit: v0.4.0
by Sean P. DeNigris Jan. 3, 2019

Jan. 3, 2019

Pharo Smalltalk Users mailing list wrote > My holy grail is a document that describes both software and > computations Yes!!! Capturing mindshare in the data analysis field would be *huge* for Pharo/GT because there are a lot of people who are new and view languages/environments as means to an end, and hence seem to be much less poisoned against blue plane ideas by years of Stockholm syndrome with obsolete but common technologies. ----- Cheers, Sean -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Updating singletons
by Konrad Hinsen Jan. 3, 2019

Jan. 3, 2019

Dear Pharo experts, I am wondering if there is a good way to deal with singleton objects whose value needs to be updated following changes in the code that initializes it. Following the model of many examples in Pharo itself, I have defined a singleton class with a uniqueInstance method for accessing (and creating if necessary) the single instance, and a method "reset" marked as a script to set the uniqueInstance back to nil when required, i.e. after source code changes make the prior value inappropriate. This works very well, as long as I don't forget to do the reset, which has already caused me a few hours of debugging time. Worse, suppose someone else is using my project in progress, pulling changes from my GitHub repo once per week. That person cannot know if the latest changes require a singleton reset. More importantly, users shouldn't have to know about such internal details at all. So is there a way to do the reset automatically whenever a new version of my package is loaded into an image? Thanks in advance, Konrad.

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Linux ARM v6 libgit2 libssh2 libsdl2
by Alistair Grant Jan. 3, 2019

Jan. 3, 2019

Hi All, Downloading and installing the Pharo 7 vmLatest on a Raspberry Pi succeeds, but is missing libgit2, libssh2 & libsdl2. The build scripts suggest this is intentional due to excessive build times, which is quite believable. Is there a place where the libraries can be downloaded from and dropped in to the VM directory? Thanks, Alistair

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Re: [Pharo-users] [Moose-dev] glamorous toolkit: v0.4.0
by Konrad Hinsen Jan. 2, 2019

Jan. 2, 2019

Hi Doru and Offray, Tudor Girba via Pharo-users <pharo-users(a)lists.pharo.org> writes: > A separate editor is needed when the markup has little resemblance > with the output, which is the case for HTML. In this case, > bidirectional editing, as shown in Sketch-n-Sketch, is indeed a very > nice thing. Or when the output reflects only a part of the input document. I suspect Offray has the same kind of application in mind as myself, knowing a bit of his work, and it is indeed a bit different from what you are designing GT for. What we do (mainly) is documenting computations, not software. A computation consists of code, input data, and selected results. This inevitably requires some metadata that needs to be editable but should not necessarily appear in the output. The most basic technology for documenting computations is the notebook (Mathematica, Jupyter, ...) where the metadata is just the cell structure (which does show in the output). More sophisticated systems (Emacs OrgMode for example) allow more fine-tuning, making for much nicer output, but also requiring quite a bit more metadata. > However, in the case of Documenter and the Pillar markup the output is > closely related to the sources part. In this case, having the two >From what I know about Pillar, I agree. The way this is handled in Documenter is indeed very appropriate for very simple markup like that. And simple markup is highly desirable whenever sufficient. > worlds be supported seamlessly in the same experience is a huge > advantage, especially for non-technical people. The interface from > Documenter is not trivially possible (I for now never saw one like > that, and I looked specifically for it) because of the prerequisites The closest I have seen is MarkText: https://marktext.github.io/website/ Its "focus mode" works much like Documenter in principle, but feels less fluent somehow. Offray Vladimir Luna CÃ¡rdenas via Pharo-users <pharo-users(a)lists.pharo.org> writes: > but is not their only concern. ATM seems that new GT is pretty tied to > Pillar and software documentation (which is fine, but not the path I'm > primarily interested). Me neither, but I still find a lot of interesting ideas in GT and I suspect that a tool closer to my interests could be built with reasonable effort from the bricks that GT provides. My holy grail is a document that describes both software and computations, combining the features of notebooks and literate programming into a hypertext-like system in which I can start at the surface (the computation) and "zoom in" to any part of the software, getting documentation and not just source code. Cheers, Konrad.

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