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[ARTICLE] Quick write me a Redis client
by Sven Van Caekenberghe June 15, 2017

June 15, 2017

Hi, I wrote another article in the 'Concerning Pharo' publication: [TITLE] Quick write me a Redis client [SUBTITLE] A beautiful protocol makes implementation easy [URL] https://medium.com/concerning-pharo/quick-write-me-a-redis-client-5fbe4ddfb… [SOURCECODE] https://github.com/svenvc/SimpleRedisClient Sven -- Sven Van Caekenberghe Proudly supporting Pharo http://pharo.org http://association.pharo.org http://consortium.pharo.org

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Help in thinking about how to save a "program"
by Glenn Hoetker June 14, 2017

June 14, 2017

Hi all. Iâm new to Pharo and loving it. As I transition from a text-file based mindset, Iâm a little stuck and would appreciate help in how to think about a situation in a Pharonic (Pharo-ish, Pharoc?) way. Iâm crafting a short program to help me process a large text file (specifically: extract, sorting, and regularizing the âkeywordâ fields of a large BibTex file). Especially since I donât really know what Iâm doing, working in a Playground has been a great development environment. Now that the program is complete (under 30 lines, wonderful), I want to be able to save it for future reference (and perhaps for future use). If Iâd written a shell script, Iâd just save âfixBibDeskKeyWords.shâ to a directory. Iâm not sure what to do in the Pharo environment, thought. At the moment, it just lives in the Playground Iâve developed it on. I could save the image and leave that Playground open, but Iâm just positive thatâs not a best practice. I also worry about what happens if I closed/cleared that Playground by accident. I think I understand that, if I created a new package, I could use Monticello to save it to a local cache and load it into a new image whenever I needed it. But, given that itâs short, highly specialized and fairly linear, the idea of creating a âGHBibDeskStuffâ package with one class (âGBibDeskKeywordFixerâ containing a single âFixFileâ method seems really heavy and awkward. Can one save the contents of a Playground in a Pharonic way? Is there a better approach? Thank you to all involved in this wonderful programming ecosystem. I appreciate any advice. Glenn Glenn Hoetker ghoetker(a)me.com <mailto:ghoetker@me.com> http://hoetker.faculty.asu.edu <http://hoetker.faculty.asu.edu/>

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I want to get in contact with raphael luque from madrid :)
by Stephane Ducasse June 14, 2017

June 14, 2017

Hi guys. I tried to get in contact with raphael but my emails do not seem to go to destination. Do you have the email of raph/fael luque from madrid? Stef

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Re: [Pharo-users] STON Question
by Guillermo Polito June 14, 2017

June 14, 2017

That's what we call a DTO On Wed, Jun 14, 2017 at 3:01 PM, Christophe Demarey < christophe.demarey(a)inria.fr> wrote: > +1 > It is exactly what i've done with Cargo. Define your own specific object > for serialization / deserialization. It is the simplest way to have a human > readable conf file (e.g. urls, pathes default serialization is not what you > expect) > > Christophe > ----- Sven Van Caekenberghe <sven(a)stfx.eu> a Ã©crit : > > STON cannot be used to write partial, manual output because it needs to > see the full object graph (like FUEL does). > > > > If I would want to use STON for prettier looking config files, I would > make an object just for that external representation, converting it where > necessary to better internal objects (like from String to FileReference). > > > > > On 5 Jun 2017, at 08:58, Stephane Ducasse <stepharo.self(a)gmail.com> > wrote: > > > > > > Sven I know what Ston is :) > > > > > > Now Pillar dev used Ston as input and it works. Then with some hooks > they let the user convert the strings > > > into specific objects and this is ok. > > > Now I want to add export in Ston and for configurations I need to > control for the application and not as a ston object the value saved. > > > For example a file reference should not be just a file reference in > Ston but > > > a string relative the the baseDirectory of the configuration. > > > > > > So I thought that I can build a hook and control the call to Ston > (convert the object before to the correct values) and export. > > > It should be working now doing this I found myself redoing the output > of Ston. > > > So I will do it. Then I thought that may be I could reuse this logic. > > > > > > Stef > > > > > > > > > > > > On Sun, Jun 4, 2017 at 11:49 PM, Sven Van Caekenberghe <sven(a)stfx.eu> > wrote: > > > Stef, > > > > > > STON is like FUEL, it can write any object to a stream and read it > back. Although you can customise how this is done, only one way of doing so > is supported (i.e. you cannot change the format for each application). > > > > > > People have used STON for various applications now, including for > configuration stuff (because it is a textual format that is easy to read). > > > > > > I would suggest you just try to see what your config looks like once > you have the objects in Pharo. > > > > > > STON toStringPretty: myConfig. > > > > > > Then we can see how to tune the representation. > > > > > > Sven > > > > > > > On 4 Jun 2017, at 22:58, Stephane Ducasse <stepharo.self(a)gmail.com> > wrote: > > > > > > > > Hi sven > > > > > > > > I'm working on a new configuration frameworks similar to the one use > pillar.conf. > > > > > > > > So basically I have > > > > > > > > ston := '{ > > > > "newLine":#unix, > > > > "separateOutputFiles":true > > > > }'. > > > > and I want to recreate it. > > > > > > > > So I did > > > > > > > > Object >> toConfigurationString > > > > > > > > ^ STON toString: self > > > > > > > > SimpleConfiguration >> exportStream > > > > > > > > ^ String streamContents: [ :str | > > > > str << '{' . > > > > self propertiesKeysAndValuesDo: [ :key :value| > > > > str << key toConfigurationString. > > > > str << ':'. > > > > str << value toConfigurationString. > > > > str << ','. > > > > str lf. > > > > ]. > > > > str << '}'. > > > > str contents > > > > ] > > > > > > > > The idea is that for special configuration values people should be > able to define > > > > how to go from the object to configuration. > > > > For example for some FileReference I want to have just the path up > to the baseDirectory. > > > > > > > > Now I wonder if I could not better reuse ston. > > > > I saw the stonOn: > > > > but I did not look further because I was wondering how the writer > where passed. > > > > > > > > Any feedback is welcome. > > > > > > > > Stef (now bed time). > > > > > > > > > > > > > > > > > > > > -- Guille Polito Research Engineer French National Center for Scientific Research - *http://www.cnrs.fr* <http://www.cnrs.fr> *Web:* *http://guillep.github.io* <http://guillep.github.io> *Phone: *+33 06 52 70 66 13

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STON Question
by Stephane Ducasse June 14, 2017

June 14, 2017

Hi sven I'm working on a new configuration frameworks similar to the one use pillar.conf. So basically I have ston := '{ "newLine":#unix, "separateOutputFiles":true }'. and I want to recreate it. So I did Object >> toConfigurationString ^ STON toString: self SimpleConfiguration >> exportStream ^ String streamContents: [ :str | str << '{' . self propertiesKeysAndValuesDo: [ :key :value| str << key toConfigurationString. str << ':'. str << value toConfigurationString. str << ','. str lf. ]. str << '}'. str contents ] The idea is that for special configuration values people should be able to define how to go from the object to configuration. For example for some FileReference I want to have just the path up to the baseDirectory. Now I wonder if I could not better reuse ston. I saw the stonOn: but I did not look further because I was wondering how the writer where passed. Any feedback is welcome. Stef (now bed time).

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How to use frameworks like SDL2, GTK+ with Pharo?
by Daniel Passaro June 14, 2017

June 14, 2017

I'm a Pharo newbie. How can I use libraries like SDL2 or GTK+ from Pharo? Should this be done through FFI or a VM plugin? And in either case is there a guide to how to implement things using that technique?

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A question of style - pass a context or embed one?
by Tim Mackinnon June 14, 2017

June 14, 2017

Hi - Iâm after some ideas or maybe previous examples that might guide me in the best approach of wrapping a low level library (essentially the Jira connector that Phil demoâd at Pharo days this year). There are some low level commands that will fetch json arrays for you given a âliraâ instance- e.g: board := JiraBoard fromJira: jira named: âProject'. sprints := board sprintsFrom: jira. My question is related to building on top of this - and its a style question. I want model objects that wrap the json arrays and let me navigate things a bit more simply, and query details more naturally - however I canât decide whether my model objects should âcontainâ a jira when you instantiate them - which can be re-used for subsequent queries - OR - whether I should view jira as a from of context, and keep passing it to methods when I need to retrieve more details, or child objects? e.g. myBoard := ModelBoard fromJira: jira named: âProjectâ. mySprints := myBoard sprints. âNo need to pass the jira againâ. vs. mySprints :- myBoard sprintsIn: jira. Iâm wondering if anything might guide me one way or the other? Is one more tasteful/elegant than the other? Tim

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Wiring objects, IoC and Service Locator
by Vitor Medina Cruz June 14, 2017

June 14, 2017

Hello, I would like to know how people in Pharo ecosystem do to deal with object wiring, as described by Marting Fowler in https://martinfowler.com/articles/injection.html#FormsOfDependencyInjection: "A common issue to deal with is how to wire together different elements: how do you fit together this web controller architecture with that database interface backing when they were built by different teams with little knowledge of each other." He gives an example, I will leave it in java as it is simple enough to understand: "class MovieLister... public Movie[] moviesDirectedBy(String arg) { List allMovies = finder.findAll(); for (Iterator it = allMovies.iterator(); it.hasNext();) { Movie movie = (Movie) it.next(); if (!movie.getDirector().equals(arg)) it.remove(); } return (Movie[]) allMovies.toArray(new Movie[allMovies.size()]); }" The question is how to provide the finder object in a decoupled matter, a naive approach would be: " private MovieFinder finder; public MovieLister() { finder = new ColonDelimitedMovieFinder("movies1.txt"); }" Which couples the MovieLister to the specific ColonDelimitedMovieFinder class. Fowler explains how to decouple using an IoC framework or a Service Locator. In Java and .Net IoC is used most of the time. I Googled how this problem is approached in Smalltalk/Pharo, and I generally I found answers "that is easy to do in Smalltalk, so there is no need of a framework", what I miss is a description on *how* to do that: https://stackoverflow.com/questions/243905/smalltalk-and-ioc https://stackoverflow.com/questions/2684326/is-there-a-dependency-injection… https://stackoverflow.com/questions/243905/smalltalk-and-ioc/347477#347477 I know that in Smalltalk I can make MovieLister to receive, upon construction, a class representing MovieFinder and call it construction message. As long an object that responds to this message is provided, I can create as many derivations I want and the MovieLister will be decoupled from the MovieFinder. That way, however, I still have to wire things by hand, and I am not sure if this is what I am supposed to do in order to solve the decouple problem. Can you explain me how this is done in Pharo? It's is usually wiring by hand? Is there a simple construction that deals with the wiring problem that I cannot foresee? Thanks in advance, Vitor

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Test request
by Hilaire June 13, 2017

June 13, 2017

Hi, A Dr. Geo user on Ubuntu 16.04 reported to me instability problem I do not meet on my 12.04 config. It seems related to Cairo or FreeType. I will likely update my system on 16.04 later this summer, but I can't just tweak it as this is the end of the school year with several admin tasks to conduct. Will any one of you with a Ubuntu 16.04 system wish to test Dr. Geo and report to me any problem? If so, here is what to do: 1. Download and unzip https://launchpad.net/drgeo/trunk/17.07/+download/DrGeo.app-17.07a.zip 2. Adjust system to 32 bits compatibility if necessary, follow instructions at http://www.drgeo.eu/faq#TOC-Debian-Jessie-Ubuntu-LinuxMint-12.04-LTS1 3. Experiment freely then drag'n drop the TortueOrange.fgeo found in the zip file at https://www.dropbox.com/s/2n3taeev9mdphdm/TortueOrange.fgeo.zip?dl=0 Does it went fine? Thanks Hilaire -- Dr. Geo http://drgeo.eu

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Remote debugger: do i need identical images ?
by Steven Costiou June 12, 2017

June 12, 2017

Hi, when using the Pharo remote debugger, we have a server side (the remote application) and a client side (the local computer used to debug). Apart from the remote debugger itself, do both images need to have exactly the same code - especially the application itself - or could they be different ? More specifically, to debug a program, do i need a local "clone" image dedicated to debug the remote image ? Steven.

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