November 2016 - Pharo-users

Dictionaries and STON
by Cyril Ferlicot D. Nov. 28, 2016

Nov. 28, 2016

Hi! I need to store some datas and in my model I have a dictionary with objects as keys. When I try to serialize and materialize it with STON I get an error. Apparently STON manage dictionaries with literals as key only. Is there a workaround to this? -- Cyril Ferlicot http://www.synectique.eu 2 rue Jacques PrÃ©vert 01, 59650 Villeneuve d'ascq France

2 2

Where is the documentation of the base class libraries?
by Derry Bryson Nov. 28, 2016

Nov. 28, 2016

Where can I find documentation of the base class libraries for Pharo Smalltalk? Or is there some other way I should learn about the system? Thanks, Derry

7 9

[SmaCC] Partial Installation
by Dimitris Chloupis Nov. 27, 2016

Nov. 27, 2016

Hey there , I would like to install from SmaCC only Python and C++ parsers , any idea how to add that to my baseline as a dependency ? --- ÎÏÏÏ ÏÎ¿ e-mail ÎµÎ»ÎÎ³ÏÎ¸Î·ÎºÎµ Î³Î¹Î± Î¹Î¿ÏÏ Î±ÏÏ ÏÎ¿ ÏÏÏÎ³ÏÎ±Î¼Î¼Î± Avast antivirus. https://www.avast.com/antivirus

3 10

[ANN] CPPBridge: One Ring to rule them ALL
by Dimitris Chloupis Nov. 25, 2016

Nov. 25, 2016

*https://youtu.be/pI4PR3XaX6Q <https://youtu.be/pI4PR3XaX6Q>* *What is it ?* CPPBridge is a library that allows Pharo to share memory with any C/C++ application. Opening the door not only to IPC and data sharing but also even complete control of C++ code from Pharo and vice versa. *How to install ?* In a few hours it should be available from Package Browser, if not you can always fetch it with Metacello from here because it comes with a Baseline https://github.com/kilon/CPPBridge *Why bother making such a library ? * In my saga to find a way to use Pharo as a scripting language for Unreal Game Engine, I had two options a) Build Unreal as a Library and use Pharo UFFI to launch and control it b) Embed Pharo inside the Unreal Executable (this is what every other scripting language uses for controlling Unreal) Option (a) was a no go, because Unreal is huge , complex and uses its own custom made build tools, making a DLL for Pharo or an army of DLLs out of the question Option (b) Embeding Pharo inside an executable is impossible and implementing it also insanely complex Naturally my mind went first into sockets which is what I use to make Pharo able to use Python libraries. However sockets have proven too slow for the insanely fast loops of Unreal. *What are the advantages ?* 1) *No need to move data around.* Sharing memory means you don't have to move data around, you can use directly the shared memory 2)* Extend the Pharo image beyond Pharo.* Shared memory is mapped into a file means that you can do with C++ what you can do with Pharo image, save the live state directly to a binary file. That means we no longer need to worry about sessions and reinitializing C/C++ data since memory mapped file acts as an extension of the Pharo image. 3) *Blazing fast. *Memory mapping is a function that comes directly from the OS kernel and as such it has to be extremely fast. Memory mapping is also what is used for dynamically linked shared libraries an extremely important feature for any application including Pharo that heavily depends on (see Cairo for Athens). So its a very mature , well tested method. 4) *No extra libraries needed* to be installed, CPPBridge uses OS libraries to work out of the box 5) *Low level handling of memory.* Direct access to memory you can even manipulate the memory byte by byte 6)* Memory efficient.* Memory mapping excels at large data, the bigger the better. Can take full advantage of your entire free memory and not waste a byte. That means also that can be used to optimise Pharo memory, since you could compress your Pharo objects to bytes and mapped file will store the live state. 7) *Tons of Languages. *Because memory mapping is a core functionality for every OS out there, pretty much every programming language supports it. CPPBridge currently supports only C/C++ but all languages can be supported giving access to Pharo to any library for any programming language. Sky is the limit 8) *Self Documented. *CPPBridge is small, simple and with large class comment and comments for every method. YouTube video tutorial also available and linked on top. 9) *Works both ways*, C/C++ and Pharo can access and modify the shared memory. Making it possible for C/C++ to use Pharo libraries and Pharo to use C/C++ libraries. 10) Experiments have proven that it improves sex life... if it does not please file a bug report ;) *What are the disadvantages ?* 1) *Candy Crash Saga*. Dare do something incorrectly and Pharo will crash. CPPBridge can easily point to wrong address if you are not aware of what you doing. 2) *C++/C* . If you think you can avoid learning C/C++ and that this is a magic solution , think again. The C/C++ application must be modified to include shared memory mapping for CPPBridge to work . 3) *Local only*. Unlike sockets, Shared Memory works only on the same machine so no remote execution and manipulation of code like in my socket bridge to Python 4) *UFFI still No1 option*. No replacement for UFFI it actually depends on it to work , so if you can turn your C/C++ code into a DLL that should be your first option. *Roadmap * Currently CPPBridge works only on MacOS , most likely on Linux too (because it uses the Unix architecture) but I will have to test it. Windows is coming next ASAP, since its my No1 platform for creating commercial games. Maybe establish a small protocol of communication via the Shared Memory , JSON looks like a good universal format *Thanks* Big thanks to Eliot for inspiring me and Esteban for helping me figure out things.

3 13

Re: [Pharo-users] [ANN] Animation package
by Thibault Raffaillac Nov. 24, 2016

Nov. 24, 2016

Great! Tell me when you have any feedback (good or bad indeed). Thibault > Hello, > > Cool, I'll give a try to add animations to my windows switcher (Mirage [1]). > > Julien > > Links: > [1]: https://github.com/juliendelplanque/Mirage

1 0

[ANN] Animation package
by Thibault Raffaillac Nov. 23, 2016

Nov. 23, 2016

Hello, I am happy to release the Animation package at last! http://smalltalkhub.com/#!/~ThibaultRaffaillac/Animation This is a general animation system, which can turn any setter message into a smooth transition (provided the target value supports + and *Float). Examples: AnimationProperty new at: morph set: #position: to: 100@100 during: 2 seconds easing: #backOut. AnimationProperty new at: morph set: #color: to: Color red during: 2 seconds easing: #linear. AnimationProperty new at: morph set: #title: to: 'tutututu' during: 2 seconds easing: #linear. Or equivalently (don't choke): morph position: (100@100 during: 2 seconds easing: #backOut). morph color: (Color red during: 2 seconds). morph title: ('tutututu' during: 2 seconds). It basically sends the setter message repeatedly during the target delay, each time with a slightly different value. It should also work with Bloc, although the update mechanism depends on Morphic's deferredUIMessage at the moment. Cheers, Thibault ps: Thanks to anonymous contributor for the second syntax, it was a lot of fun - and evil laughs :)

4 3

Re: [Pharo-users] Pharo 5 on Raspberrypi 2 Howto
by Sven Van Caekenberghe Nov. 22, 2016

Nov. 22, 2016

Hi, Have a look at this thread: http://forum.world.st/Cog-VM-on-Raspberry-Pi-tt4919105.html HTH, Sven > On 22 Nov 2016, at 19:33, Oswall Verny Arguedas C. via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > From: "Oswall Verny Arguedas C. via Pharo-users" <pharo-users(a)lists.pharo.org> > Subject: [Pharo-users] Pharo 5 on Raspberrypi 2 Howto > Date: 22 November 2016 at 19:33:30 GMT+1 > To: Any Question About Pharo Is Welcome <pharo-users(a)lists.pharo.org> > Cc: "Oswall Verny Arguedas C." <oswallcr(a)yahoo.com> > Reply-To: "Oswall Verny Arguedas C." <oswallcr(a)yahoo.com>, Any question about pharo is welcome <pharo-users(a)lists.pharo.org> > > > > From: "Oswall Verny Arguedas C." <oswallcr(a)yahoo.com> > Subject: Pharo 5 on Raspberrypi 2 Howto > Date: 22 November 2016 at 19:33:30 GMT+1 > To: Any Question About Pharo Is Welcome <pharo-users(a)lists.pharo.org> > Reply-To: "Oswall Verny Arguedas C." <oswallcr(a)yahoo.com> > > > Good day, > I need to install pharo in raspberrypi. > I try to install it, but I can not make the right combination of "sources" with "vm" and "image". I have runtime errors. > Please if you can tell me the best way to do it, thanks in advance. > I want to install it on Raspberrypi B + and Raspberrypi 2. > > Oswall > > > >

1 0

Pharo 5 on Raspberrypi 2 Howto
by Oswall Verny Arguedas C. Nov. 22, 2016

Nov. 22, 2016

Good day,I need to install pharo in raspberrypi.I try to install it, but I can not make the right combination of "sources" with "vm" and "image". I have runtime errors.Please if you can tell me the best way to do it, thanks in advance.I want to install it on Raspberrypi B + and Raspberrypi 2. Oswall

1 0

Re: [Pharo-users] Rest Services with pharo objects as parameters
by Esteban Lorenzano Nov. 22, 2016

Nov. 22, 2016

Hi, if this is from voyage, then is a complicated query, because it is storing a reference to a second root. Letâs say you have an object a1 who is an instance of A and an object b1 who is an instance of B. b := B new. a := A new data1: 42; data2: âsomethingâ; refB: b. which means what you want, in plain Pharo would be something like this: aCollectionOfA select: [ :each | each refB = b ]. but since you want to use Voyage, I guess you want to execute the query *in mongo* (to avoid loading all instances of A into memory). So, in voyage you need to do it in some hack way: B selectOne: [ :each | â¦ ]. A selectMany: [ :each | (each at: ârefB.__idâ) = b voyageId ]. this will solve your problem, I guess. Esteban ps: this is hacky because what in general you do with this kind of structures is to keep a list of A in B, along with your list of B in A (that means, you define a many-to-many relationship) > On 22 Nov 2016, at 11:42, Asbath Sama biyalou via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > From: Asbath Sama biyalou <asamabiyalou(a)yahoo.com> > Subject: Rest Services with pharo objects as parameters > Date: 22 November 2016 at 11:42:25 GMT+1 > To: Pharo users users <pharo-users(a)lists.pharo.org> > > > Hello Everybody. > > I have two classes ClassA(data1 data2 ref_ClassB) ClassB (data3 data4). > > I want to get list of classA where ref_ClassB = ClassB. I don't know how > to do my url in order > > to sent ClassB as a parameter of the service. I am using Pharo 4.0 with > Voyage-Mongo. > > > >

1 0

Rest Services with pharo objects as parameters
by Asbath Sama biyalou Nov. 22, 2016

Nov. 22, 2016

Hello Everybody. I have two classes ClassA(data1 data2 ref_ClassB) ClassB (data3 data4). I want to get list of classA where ref_ClassB = ClassB. I don't know how to do my url in order to sent ClassB as a parameter of the service. I am using Pharo 4.0 with Voyage-Mongo.

1 0