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Re: [Pharo-users] pillar questions

by Damien Pollet

I've been cleaning the book archetype's makefile this afternoon. I suspect there is no list of chapters because the example is quite minimal. Enterprise Pharo was the one Thibault and Yann worked with, so I need to compare with it. The recent work on pillar was about removing superfluous responsabilities and moving it towards a simpler markup renderer. Chapter numbering is a global information, which is OK in LaTeX because it can be computed by TeX during its compilation pass; however HTML chapters are just generated one for one following the pillar files. On 15 September 2016 at 15:09, Serge Stinckwich <serge.stinckwich(a)gmail.com> wrote: > Maybe you should have a look to Enterprise Pharo book pillar template ? > https://github.com/SquareBracketAssociates/EnterprisePharo > > But apparently I'm not able to compile last version ... > make book fails > > > > On Thu, Sep 15, 2016 at 2:06 PM, Tudor Girba <tudor(a)tudorgirba.com> wrote: > > Hi, > > > > I see that in the new book template, we have both a book.pillar that > includes the chapter files, and a pillar.conf that is mostly empty. Is > pillar.conf still used? If yes, what should it contain? > > > > If I embed the chapters in a book.pillar and I render the whole book, > the numbering of the second chapter starts from 1 (instead of 2) when I > render in html. Any idea how to do it differently? > > > > Cheers, > > Doru > > > > > > -- > > www.tudorgirba.com > > www.feenk.com > > > > "Yesterday is a fact. > > Tomorrow is a possibility. > > Today is a challenge." > > > > > > > > > > > > > > -- > Serge Stinckwich > UCBN & UMI UMMISCO 209 (IRD/UPMC) > Every DSL ends up being Smalltalk > http://www.doesnotunderstand.org/ > >

Sept. 15, 2016

letsencrypt smalltalkhub ?

by PAUL DEBRUICKER

Hi - Has anyone looked into adding https://letsencrypt.org/ to the servers/vms Smalltalkhub runs on so we can have https access by default?

Sept. 15, 2016

Re: [Pharo-users] double dispatch example

by Alexandre Bergel

> I was thinking about the code in Pharo. > > Plenty of examples: >> - Converting money > > can you tell me more about this one? I mean summing and converting different money. Here is the whole idea: 1 EUR = 662 CLP (Chilean pesos) You have a class Money to which you can sum other money. Object subclass: #Money instVarNames: âvalueâ âI omit here the accessors of value. Note that generating the accessors of value produces a method value1, you have to rename it" Money>>+ anotherMoney self subclassResponsibility Money>>sumWithEUR: money self subclassResponsibility Money>>sumWithCLP: money self subclassResponsibility Money>>= anotherMoney ^ self class == anotherMoney class and: [ self value = anotherMoney value ] Money >>printOn: str "Useful for debugging" super printOn: str. str nextPut: $<. str nextPutAll: self value asString. str nextPut: $>. You have two subclasses: Money subclass: #EUR Money subclass: #CLP EUR>>+ anotherMoney ^ anotherMoney sumWithEUR: self EUR>>sumWithEUR: money ^ EUR new value: self value + money value EUR>>sumWithCLP: money ^ CLP new value: (self value * 662) + money value CLP>>+ anotherMoney ^ anotherMoney sumWithCLP: self CLP>>sumWithEUR: money ^ EUR new value: (self value / 662) + money value CLP>>sumWithCLP: money ^ CLP new value: self value + money value Here is a test: TestCase subclass: #MoneyTest MoneyTest>>testSum | clp1 eur1 clp2 eur2 | clp1 := CLP new value: 3500. eur1 := EUR new value: 10. clp2 := CLP new value: 5000. eur2 := EUR new value: 20. self assert: clp1 + clp2 equals: (CLP new value: 8500). self assert: clp1 + eur1 equals: (CLP new value: 3500 + 6620). self assert: eur1 + eur2 equals: (EUR new value: 30). self assert: eur1 + clp2 equals: (EUR new value: 5000 / 662 + 10). To be really complete, the example also needs to implement hash and the test should also test equality. I hope it helps! Cheers, Alexandre > >> - Paper, Stone, Scissor >> - A canvas containing triangle, circle, box has to be printed, on an html canvas or PDF. (Very close to the Visitor design pattern, but simpler) >> >> Here are the lectures I use: >> https://dl.dropboxusercontent.com/u/31543901/TMP/DoubleDispatch.zip > > TX > here is what I wrote today > > > >> >> (One of them is highly inspired from a lecture from Oscar) > > I will have a look now >> >> Hope it helps! >> >> Cheers, >> Alexandre >> >>> On Sep 13, 2016, at 7:33 AM, stepharo <stepharo(a)free.fr> wrote: >>> >>> Hi >>> >>> If you happen to know a double dispatch situation in Pharo, I'm interested since I'm revisiting my lecture. >>> >>> >>> Stef >>> >>> >> >> > > <Design-DoubleDispatch.pdf>

Sept. 15, 2016

Re: [Pharo-users] pillar questions

by Serge Stinckwich

Maybe you should have a look to Enterprise Pharo book pillar template ? https://github.com/SquareBracketAssociates/EnterprisePharo But apparently I'm not able to compile last version ... make book fails On Thu, Sep 15, 2016 at 2:06 PM, Tudor Girba <tudor(a)tudorgirba.com> wrote: > Hi, > > I see that in the new book template, we have both a book.pillar that includes the chapter files, and a pillar.conf that is mostly empty. Is pillar.conf still used? If yes, what should it contain? > > If I embed the chapters in a book.pillar and I render the whole book, the numbering of the second chapter starts from 1 (instead of 2) when I render in html. Any idea how to do it differently? > > Cheers, > Doru > > > -- > www.tudorgirba.com > www.feenk.com > > "Yesterday is a fact. > Tomorrow is a possibility. > Today is a challenge." > > > > > -- Serge Stinckwich UCBN & UMI UMMISCO 209 (IRD/UPMC) Every DSL ends up being Smalltalk http://www.doesnotunderstand.org/

Sept. 15, 2016

pillar questions

by Tudor Girba

Hi, I see that in the new book template, we have both a book.pillar that includes the chapter files, and a pillar.conf that is mostly empty. Is pillar.conf still used? If yes, what should it contain? If I embed the chapters in a book.pillar and I render the whole book, the numbering of the second chapter starts from 1 (instead of 2) when I render in html. Any idea how to do it differently? Cheers, Doru -- www.tudorgirba.com www.feenk.com "Yesterday is a fact. Tomorrow is a possibility. Today is a challenge."

Sept. 15, 2016

Re: [Pharo-users] What are the best practices for an open source project with Pharo?

by julius

Thank you very much Stepharo and Ben, your answers are very helpful. I also realised that I should read the Monticello chapter in the book again. It's amazing how much functionality Pharo provides out of the box, sometimes almost too much :) -- View this message in context: http://forum.world.st/What-are-the-best-practices-for-an-open-source-projec… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Sept. 15, 2016

Re: [Pharo-users] [Moose-dev] [ann] pillar support in gtinspector

by Nicolai Hess

2016-09-14 22:47 GMT+02:00 Tudor Girba <tudor(a)tudorgirba.com>: > Hi Nicolai, > > Did you commit your changes with the highlight of == code? > > Cheers, > Doru > > No, but I just saw that I misinterpreted the "==", first I thought this is for "inline code" as it was used in some class comment like that. But it is actually a more general formatting tag for "monospaced font" - we actually don't need to do code highlighting for this text, just use a monospace font resp. code font. > > > On Sep 6, 2016, at 4:56 PM, Nicolai Hess <nicolaihess(a)gmail.com> wrote: > > > > > > > > 2016-08-29 21:41 GMT+02:00 Tudor Girba <tudor(a)tudorgirba.com>: > > Hi, > > > > I updated the Pillar support in GTInspector. Some of the extensions > already exist in the default Pillar #development version. If you want to > play with the full support, you can load it like this: > > > > Gofer new > > smalltalkhubUser: 'Moose' project: 'PetitParser'; > > package: 'PetitAnalyzer'; > > package: 'PetitIndent'; > > package: 'PetitIslands'; > > smalltalkhubUser: 'Moose' project: 'GToolkit'; > > package: 'GT-InspectorExtensions-Pillar'; > > load > > > > Then you can just inspect a book folder and you get this: > > > > <inspector-pillar.png> > > > > I did not integrate this in the main Pillar yet because this is an older > implementation based on a limited island parser. As now Pillar has a full > parser based on PetitParser, the next step is to move the highlighting > logic to use this parser instead of the island parser. From my > measurements, the speed of the two parsers is about the same, so from a > user perspective there will be not much changes. > > > > It pains me that we are editing Pillar in outside tools, and now we > should no longer have to do that. Of course, this is not the most ideal > tool support for Pillar but I think it is a reasonable start. > > > > Cheers, > > Doru > > > > > > nice! > > > > I just played a bit with the code to apply larger different font sizes > for the headings and > > use the code styler for inlined code ("=="). > > > > Maybe we should use a different code styler or add a way to instruct the > styler to ignore unknown classes or uknown selectors :) > > > > > > > > > > -- > > www.tudorgirba.com > > www.feenk.com > > > > "Problem solving should be focused on describing > > the problem in a way that makes the solution obvious." > > > > > > > > > > > > > > _______________________________________________ > > Moose-dev mailing list > > Moose-dev(a)list.inf.unibe.ch > > https://www.list.inf.unibe.ch/listinfo/moose-dev > > -- > www.tudorgirba.com > www.feenk.com > > "Obvious things are difficult to teach." > > > > > >

Sept. 15, 2016

Re: [Pharo-users] Extending live coding beyond Pharo

by Dimitris Chloupis

It's not a trick or slow , it's actually a standard feature and blazing fast. Its a feature that has existed for several decades now . It's called "exception". There are three types of exceptions. 1) language exception. This type of exception is handled by the language and it can involve both an error or even a normal running code. Usually they are handled by a library or VM. 2) OS system exceptions. This exception is handled by the operation system itself and its what debuggers usually use to capture crashes. In Windows they are called "structured exceptions" https://msdn.microsoft.com/en-us/library/windows/desktop/ms680657(v=vs.85).… In UNIX type OS they are called "signals and traps" http://www.tutorialspoint.com/unix/unix-signals-traps.htm 3) hardware exception. This exception is handled directly by the CPU. http://www.internals.com/articles/protmode/interrupts.htm If you are interested in the internals of live coding and exception handling this guy made a series of videos how to make a game from scratch using no library and has 3 videos on the subject that show himself coding these features https://m.youtube.com/watch?v=WMSBRk5WG58 https://m.youtube.com/watch?v=oijEnriqqcs https://m.youtube.com/watch?v=xrUSrVvB21c The only trick is not to let the DLL have any of its own memory, instead the main executable keeps its memory in one place, in this case a struct is used, and the memory is passed as reference via a pointer to DLL. The DLL in turn passes pointers to its functions to the executable, and the executable passes also pointers to its functions to the DLL that the DLL may want to use as callbacks. In short code and memory is passed around only as reference. This is just very basic C/C++ coding using DLLs nothing special about it. Storing the code inside Pharo image is very easy todo , after all we store graphics files in the image. But it's not really necessary or useful. If you decide to keep everything in image you lose a lot of tools that can make your life a lot easier, like coding tools, debuggers etc that averages C coder uses. If you want to do trigger those things from inside Pharo you can use OSProcess to do so as we do with git , see gitfiletree. If you want real time compiling without the need to force the user to install a compiler or increase the size of the Pharo installation you can use CI or a online service that provides compilations of DLLs via the Internet. Pharo of course already has this ability because it uses CI to build its VM and image in order to provide you with a download link. So basically you have all those tools already available to you. Tracking changes can happen at file level so you don't need to do that in image either. The videos I linked clearly illustrate the process. The only catch is that you cannot makes this automatic because live coding and real time compiling depends a lot on the structure of the code and this is not something you can predict. Also it's a good idea the user knows what he is doing because else he will run into trouble fast. For example people who use Slang are VM developers and they both know the VM internals and how to code in C. The same way that in order to code in Pharo you have to know Pharo. If you don't want to hack the Pharo executable then you can simple use one DLL to load another DLL , this way the first DLL will act as container/sandbox for the second DLL and replicate much of the same workflow I mentioned for the executable. After all DLLs are very similar to executables. On Thu, 15 Sep 2016 at 06:03, Ben Coman <btc(a)openinworld.com> wrote: > On Thu, Sep 15, 2016 at 3:38 AM, Dimitris Chloupis > <kilon.alios(a)gmail.com> wrote: > > Live coding on Pharo is great, easy , simple and working out of the box. > An > > extremely useful tool to be able to code an application while it runs, > > change and improve code with no interruptions. > > > > However there will be cases that Pharo wont be enough, that can be > because > > pharo code is not as fast as you want it to be, or plainly you found a > great > > library in C or C++ you wanna use from Pharo and there is literally a > ton of > > them. However there is a catch , you kiss goodbye to live coding , you > say > > hello to slow compiles and crashes because of bad memory management. > > > > Unfortunately that is the nature of C/C++. However live coding is gaining > > ground lately and more and more languages use it for super fast > development. > > Some C++ coders have wondered whether they can bring this feature back to > > C++ and they have succeed. > > > > One example is Unreal game engine I am using .It can compile code on the > fly > > and load it back even though the game is keep running. It calls this > > process "hot reloading". > > > > But for people that dont want to bother with Unreal there is this project > > > > http://runtimecompiledcplusplus.blogspot.gr/ > > > > The nice things about this is that not only it allows for live coding and > > very fast compiles but also its able to catch crashes with system > > exceptions, in a case of a crash the application keeps running because > the > > crashy code is exchanged with the previous version of the code that did > not > > crash and the crash is captured with an exception, you can use the > debugger > > to debug it , correct the code and continue like you would with Pharo. > > > > There are disadvantages though, because RCPP makes no compromises when it > > comes to performance that means that it needs a very specific way of > coding > > to accomodate for live coding, usually a main loop should exist and > there is > > an API that must be used to track changes to the files and reload code on > > demand. But generally it does work very well and its also used by > commercial > > projects all around the world. > > > > This will be a real nice addition to the toolbox of people who like to > > extend Pharo with C/C++ but do not want to live the comforts of live > coding > > and have low tolerance for slow compile times and crashes. > > Nice idea. I've been wondering if there might be some way of having a > SafeFFI for use during development and by newbies. After all, gdb > doesn't crash when the program its hosting crashes I guess there is > *some* trick could be used. It could even be a *lot* slower and still > be useful, to be turned off at deployment. > > Actually just last night I was contemplating what a Pharo system might > be like with FFI-libclang dynamically compiling in-Image C code, > (re-)linking it into a dynamic library and immediately calling those > functions using FFI again. My very first graduate programming job was > a company developing satellite image processing software that got a > lot of their speed by generating/compiling/linking/loading C functions > for filter-chains to apply to the huge data sets. > > Maybe something like... > > Behavior subclass: #CLanguageDescription > instanceVariableNames: 'index translationUnit' > classVariableNames: '' > package: 'ExternalLanguage-C' > "Provide compatibility to integrate equivalent of C files in our > System Browser. > - class-pane==>C-file, method-pane==>types and functions" > > ProtoObject subclass: #CLanguageRootHierarchy > instanceVariableNames: '' > classVariableNames: '' > package: 'ExternalLanguage-C' > "My subclasses are instances of CLanguageDescription compiled > by a C compiler such that pure C syntax can be used. > i.e. positional function arguments f(a,b)" > > At a minimum, it might bring FFI function callout definitions closer > to pure cut and paste. (Although the current UFFI callout format is > pretty good.) > > A *lot* further stretch... you might store all the VM platform sources > inside the image, as well as the generated C code from slang > primitives. Updating the slang method immediately re-generates the C > code, compiles it and updates the dynamic library. Dependencies > could be tracked at a finer level that standard file based makefile, > such that an update to a platform C type or function declaration would > be linked to other types and functions using (based on AST analysis > and the minimum set recompiled immediately. Unit tests for platform > sources would be Smalltalk based FFI callouts invoked from TestRunner. > > (But I know... its easy to dream. harder to do.) > cheers -ben > >

Sept. 15, 2016

Re: [Pharo-users] Pharo users count / estimate ?

by Marcus Denker

> On 14 Sep 2016, at 17:15, Johan Fabry <jfabry(a)dcc.uchile.cl> wrote: > > Hi all, > > for some silly report that I need to write I wanted to add an estimate of how many people worldwide use Pharo. I tried to find number of downloads of e.g. Pharo 5 to use that as a basis for estimation but I could not find this info online. Does the Pharo team have any usable statistics that can be shared ? > We have no information. Marcus

Sept. 15, 2016

Re: [Pharo-users] double dispatch example

by Ben Coman

http://lists.pharo.org/mailman/listinfo/pharo-users_lists.pharo.org On Thu, Sep 15, 2016 at 10:04 AM, Melanie Tarr <melanie.tarr(a)gmail.com> wrote: > Can someone please tell me how to unsubscribe from this list, > > Kind Regards > Melanie > > On Tue, Sep 13, 2016 at 10:16 PM, Alexandre Bergel <alexandre.bergel(a)me.com> > wrote: >> >> Hi Stef! >> >> Plenty of examples: >> >> - Converting money >> - Paper, Stone, Scissor >> - A canvas containing triangle, circle, box has to be printed, on an html >> canvas or PDF. (Very close to the Visitor design pattern, but simpler) >> >> Here are the lectures I use: >> https://dl.dropboxusercontent.com/u/31543901/TMP/DoubleDispatch.zip >> >> (One of them is highly inspired from a lecture from Oscar) >> >> Hope it helps! >> >> Cheers, >> Alexandre >> >> > On Sep 13, 2016, at 7:33 AM, stepharo <stepharo(a)free.fr> wrote: >> > >> > Hi >> > >> > If you happen to know a double dispatch situation in Pharo, I'm >> > interested since I'm revisiting my lecture. >> > >> > >> > Stef >> > >> > >> >> >

Sept. 15, 2016