November 2018 - Pharo-users

Re: [Pharo-users] question about FFI

by Yuriy Babah

just in case, and https://www.virustotal.com/ru/file/738460bb6be71b4615581dad1a787cbb80b188e5… Ð¿Ð½, 26 Ð½Ð¾ÑÐ±. 2018 Ð³. Ð² 12:50, Yuriy Babah <babah.yuriy06(a)gmail.com>: > Thank, i'm trued do this, and i'm got > aBoxedFloat64 4.5879913020458836e-41 , > which is still a very strange value > > Ð¿Ð½, 26 Ð½Ð¾ÑÐ±. 2018 Ð³. Ð² 12:33, tesonep(a)gmail.com <tesonep(a)gmail.com>: > >> Hi, >> >> could be the problem that you are using the same external array for >> both xm and ym?. >> The clone message just creates a shallow copy of the external array. >> It does not allocates a new external array, it only copies the address in >> both xm and ym. >> >> You should better do something like this: >> >> xm := FFIExternalArray externalNewType: 'float' size: 2. >> ym := FFIExternalArray externalNewType: 'float' size: 2. >> >> Cheers. >> >> On Mon, Nov 26, 2018 at 9:30 AM Yuriy Babah <babah.yuriy06(a)gmail.com> >> wrote: >> >>> Hi ! >>> >>> I'm trying to call a very simple function from C ++ lib, writed for the >>> test. >>> function with prototype: >>> >>> extern "C" float interpolationFunc(float* xm, float* ym, int size, float >>> x). >>> >>> In Pharo7 wrote: >>> FFIExamples class >> interpolationFunc_xm: xM ym: yM size: size x: x >>> ^ self ffiCall: #(float interpolationFunc #(float * xM , float * yM >>> , int size , float x)) module: 'libinterpolationLib.so' >>> >>> in Playground i'm doing: >>> xm := FFIExternalArray externalNewType: 'float' size: 2. >>> ym := xm clone. >>> #(2 3) doWithIndex: [:each :i | xm at: i put: each]. >>> #(3 4) doWithIndex: [:each :i | ym at: i put: each]. >>> FFIExamples interpolationFunc_xm: xm pointer ym: ym pointer size: 2 x: >>> 2.5 . >>> >>> last expression returninÐ¿ me 0.0, but right is 3.5. >>> >>> I'm dit the same in Python3 ctypes, and there work's fine. >>> >>> In UnifiedFFI booklet is absent chapter "Arrays", anybody may help with >>> whot i'm doing wrong? >>> >> >> >> -- >> Pablo Tesone. >> tesonep(a)gmail.com >> >

Nov. 26, 2018

Re: [Pharo-users] question about FFI

by Yuriy Babah

Thank, i'm trued do this, and i'm got aBoxedFloat64 4.5879913020458836e-41 , which is still a very strange value Ð¿Ð½, 26 Ð½Ð¾ÑÐ±. 2018 Ð³. Ð² 12:33, tesonep(a)gmail.com <tesonep(a)gmail.com>: > Hi, > > could be the problem that you are using the same external array for > both xm and ym?. > The clone message just creates a shallow copy of the external array. > It does not allocates a new external array, it only copies the address in > both xm and ym. > > You should better do something like this: > > xm := FFIExternalArray externalNewType: 'float' size: 2. > ym := FFIExternalArray externalNewType: 'float' size: 2. > > Cheers. > > On Mon, Nov 26, 2018 at 9:30 AM Yuriy Babah <babah.yuriy06(a)gmail.com> > wrote: > >> Hi ! >> >> I'm trying to call a very simple function from C ++ lib, writed for the >> test. >> function with prototype: >> >> extern "C" float interpolationFunc(float* xm, float* ym, int size, float >> x). >> >> In Pharo7 wrote: >> FFIExamples class >> interpolationFunc_xm: xM ym: yM size: size x: x >> ^ self ffiCall: #(float interpolationFunc #(float * xM , float * yM , >> int size , float x)) module: 'libinterpolationLib.so' >> >> in Playground i'm doing: >> xm := FFIExternalArray externalNewType: 'float' size: 2. >> ym := xm clone. >> #(2 3) doWithIndex: [:each :i | xm at: i put: each]. >> #(3 4) doWithIndex: [:each :i | ym at: i put: each]. >> FFIExamples interpolationFunc_xm: xm pointer ym: ym pointer size: 2 x: >> 2.5 . >> >> last expression returninÐ¿ me 0.0, but right is 3.5. >> >> I'm dit the same in Python3 ctypes, and there work's fine. >> >> In UnifiedFFI booklet is absent chapter "Arrays", anybody may help with >> whot i'm doing wrong? >> > > > -- > Pablo Tesone. > tesonep(a)gmail.com >

Nov. 26, 2018

Re: [Pharo-users] question about FFI

by tesonep＠gmail.com

Hi, could be the problem that you are using the same external array for both xm and ym?. The clone message just creates a shallow copy of the external array. It does not allocates a new external array, it only copies the address in both xm and ym. You should better do something like this: xm := FFIExternalArray externalNewType: 'float' size: 2. ym := FFIExternalArray externalNewType: 'float' size: 2. Cheers. On Mon, Nov 26, 2018 at 9:30 AM Yuriy Babah <babah.yuriy06(a)gmail.com> wrote: > Hi ! > > I'm trying to call a very simple function from C ++ lib, writed for the > test. > function with prototype: > > extern "C" float interpolationFunc(float* xm, float* ym, int size, float > x). > > In Pharo7 wrote: > FFIExamples class >> interpolationFunc_xm: xM ym: yM size: size x: x > ^ self ffiCall: #(float interpolationFunc #(float * xM , float * yM , > int size , float x)) module: 'libinterpolationLib.so' > > in Playground i'm doing: > xm := FFIExternalArray externalNewType: 'float' size: 2. > ym := xm clone. > #(2 3) doWithIndex: [:each :i | xm at: i put: each]. > #(3 4) doWithIndex: [:each :i | ym at: i put: each]. > FFIExamples interpolationFunc_xm: xm pointer ym: ym pointer size: 2 x: > 2.5 . > > last expression returninÐ¿ me 0.0, but right is 3.5. > > I'm dit the same in Python3 ctypes, and there work's fine. > > In UnifiedFFI booklet is absent chapter "Arrays", anybody may help with > whot i'm doing wrong? > -- Pablo Tesone. tesonep(a)gmail.com

Nov. 26, 2018

question about FFI

by Yuriy Babah

Hi ! I'm trying to call a very simple function from C ++ lib, writed for the test. function with prototype: extern "C" float interpolationFunc(float* xm, float* ym, int size, float x). In Pharo7 wrote: FFIExamples class >> interpolationFunc_xm: xM ym: yM size: size x: x ^ self ffiCall: #(float interpolationFunc #(float * xM , float * yM , int size , float x)) module: 'libinterpolationLib.so' in Playground i'm doing: xm := FFIExternalArray externalNewType: 'float' size: 2. ym := xm clone. #(2 3) doWithIndex: [:each :i | xm at: i put: each]. #(3 4) doWithIndex: [:each :i | ym at: i put: each]. FFIExamples interpolationFunc_xm: xm pointer ym: ym pointer size: 2 x: 2.5 . last expression returninÐ¿ me 0.0, but right is 3.5. I'm dit the same in Python3 ctypes, and there work's fine. In UnifiedFFI booklet is absent chapter "Arrays", anybody may help with whot i'm doing wrong?

Nov. 26, 2018

Re: [Pharo-users] Pharo 7 - RFB

by PBKResearch

Sanjay You may find more information at: https://en.wikipedia.org/wiki/RFB_protocol https://en.wikipedia.org/wiki/Virtual_Network_Computing Do you want to use 'remote access to graphical user interfaces'? If not, maybe you can ignore it. Peter Kenny -----Original Message----- From: Pharo-users <pharo-users-bounces(a)lists.pharo.org> On Behalf Of Paul DeBruicker Sent: 25 November 2018 21:34 To: pharo-users(a)lists.pharo.org Subject: Re: [Pharo-users] Pharo 7 - RFB http://www.samadhiweb.com/tags/VNC Sanjay Minni wrote > OK loaded RFB in pharo 7.0 Thru Monticello > > is there any documentation somewhere > > > Sanjay Minni wrote >> what is RFB used for ? and can I load it in Pharo 7. >> I could not find any documentation anywhere >> >> When migrating an earlier application (pharo 6.1 to 7.0) RFB was >> loaded in the ConfigurationOfApplication,(in 6.1) However in Pharo 7, >> I manually loaded the required packages and loading seems complete >> without RFB so am trying to figure out what is RFB and what was it >> used for (application loaded fine). >> >> any inputs pls how to go about it >> (off course I can try running and just see if anything crashes while >> running but so many things may cause crashes and want to know before >> proceeding) >> >> >> >> ----- >> cheers, >> Sanjay >> -- >> Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > > > > > > ----- > cheers, > Sanjay > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Nov. 26, 2018

Re: [Pharo-users] Playing with Pharo 7

by Paul DeBruicker

For #1: Set up a Metacello Baseline for your project and then you can automatically load your packages and settings into as many images as you like. https://github.com/Metacello/metacello Not sure about #2 khinsen wrote > Hi everyone, > > after finishing the Pharo MOOC, I have started to play with a simple > project of my own, initially using Pharo 6.1. Since Pharo 7 seems to be > coming soon, I wanted to try it out, and that lead to a few practical > questions. > > 1) How do you move your personal environment to a new image? If I have > to re-do my settings and re-load one by one the packages I use, I > won't be trying out new images more than strictly necessary. > > 2) My test project lives on GitHub, so I fired up Iceberg under Pharo 7 > to load it. Works fine... but I cannot commit and push under Pharo > 7. Iceberg pretends that there are no changes. With Pharo 6.1, this > works very well. Has the operation of Iceberg changed significantly? > If so, what would be the best place to learn about this? > > Any pointers would be appreciated! > > Cheers, > Konrad. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Nov. 25, 2018

Re: [Pharo-users] Pharo 7 - RFB

by Paul DeBruicker

http://www.samadhiweb.com/tags/VNC Sanjay Minni wrote > OK loaded RFB in pharo 7.0 Thru Monticello > > is there any documentation somewhere > > > Sanjay Minni wrote >> what is RFB used for ? and can I load it in Pharo 7. >> I could not find any documentation anywhere >> >> When migrating an earlier application (pharo 6.1 to 7.0) >> RFB was loaded in the ConfigurationOfApplication,(in 6.1) >> However in Pharo 7, I manually loaded the required packages and loading >> seems complete without RFB so am trying to figure out what is RFB and >> what >> was it used for (application loaded fine). >> >> any inputs pls how to go about it >> (off course I can try running and just see if anything crashes while >> running >> but so many things may cause crashes and want to know before proceeding) >> >> >> >> ----- >> cheers, >> Sanjay >> -- >> Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > > > > > > ----- > cheers, > Sanjay > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Nov. 25, 2018

Re: [Pharo-users] My Keynote at the Salta Conference

by Offray Vladimir Luna CÃ¡rdenas

Well the important thing is that conversations like this are happening and we, as a community are thinking in alternative ways to promote Smalltalk, and scale such promotion, being by copying your vision, one country at the time, to by using alternative ways. I think these are important conversations. Cheers, Offray On 24/11/18 15:10, horrido wrote: > Indeed, Lorenzo Schiavina has expressed interest in modelling a similar > competition in Italy with my competition material! This was the vision I had > three years ago. > > > > Offray Vladimir Luna CÃ¡rdenas-2 wrote >> Yes, as I told that would be a big deviation from the vision, but also a >> way to bridge it with the community. Anyway making a pretty localized >> competition in a Smalltalk variant for a particular population of a >> specific country is also a way to promote Smalltalk and after done it >> will bring lessons on efforts to results ratio and community involvement. >> >> Cheers, >> >> Offray >> >> On 24/11/18 7:53, horrido wrote: >>> All of these are good ideas. But they deviate from my vision. At any >>> rate, my >>> competition idea was a big hit in Salta, and I am committed to moving >>> forward with it. >>> >>> Since nobody has stepped up to the plate, David Buck will try to find >>> time >>> to code the competition. However, progress will be slow because of his >>> busy >>> schedule. >>> >>> And since David is not familiar with Pharo, we'll have to do the >>> competition >>> in VisualWorks, after all. Perhaps in the next edition of the James >>> Robertson Memorial Programming Competition (hopefully in 2021 for the >>> United >>> States), someone will port the VisualWorks code over to Pharo (hint, >>> hint). >>> >>> Ah, the vicissitudes of being a competition organizer... >>> >>> >>> >>> Offray Vladimir Luna CÃ¡rdenas-2 wrote >>>> Hi, >>>> >>>> Thanks for your positive and critical comments, as usual Ben. >>>> >>>> Richard I think that is important to listen to a community when reaching >>>> to it (I remember a talk we had where I suggested an approach closer to >>>> anthropology instead of marketing). Many of us value your contributions, >>>> despite of approaching them in a critical way. For example, I think that >>>> promotion is important, but popularity is not, and the later is not a >>>> proper measure of the effectivity of the former. As a Latin American >>>> (that means people born and rise Latino America, not Latinos living in >>>> United States) for me is really alien the North American people (that >>>> means people living in the North region of the American continent that >>>> goes from Alaska to Patagonia and beyond) is kind of obsessed with >>>> popularity, competition, winning and losing, at least for what popular >>>> media depicts (even seems that loser is kind of a big insult over >>>> there). I don't think that winning a competition is the best way of >>>> making a younger become part of collaborative open community. Also, in >>>> an interconnected world, I feel more inclined to volunteer my time >>>> helping a young person from the Global South to become part of the >>>> Pharo/Smalltalk community that to volunteer my time for a pretty >>>> localized competence in a particular place of the Global North. >>>> >>>> That being said, I think that little money can help a lot (specially in >>>> the Global South) and I like the idea of making young people interested >>>> in the offerings that Smalltalk has. The average FLOSS project has a >>>> media of one developer [1], so even winning one more after the >>>> competition is a big win. But I would try to volunteer my time in >>>> something that brings the gap between Pharo communities and young people >>>> and between the Global North and the Global South, specifically in my >>>> Pharo powered project, Grafoscopio. >>>> >>>> [1] https://mako.cc/writing/hill-when_free_software_isnt_better.html >>>> >>>> So I'm glad that you are open to suggestions. Here come mine about how >>>> this could be done, but this may also become something totally different >>>> of your actual proposal, but, hopefully, also more global, interesting, >>>> long lasting and a middle point between your promotional efforts and the >>>> activities of this community. >>>> >>>> # The Smalltalk Global Campfire >>>> >>>> Is an immersive inclusive global experience where new people (regardless >>>> of age, ethnicity or gender) can participate in a Smalltalk powered >>>> project and get mentorship from community members and start a long >>>> lasting relationship with a powerful technology, Smalltalk, and the >>>> friendly communities around it. >>>> >>>> ## How it will work >>>> >>>> Seasoned global Smalltalkers will propose a "tent", which is a set of >>>> related campfire projects (one or many) directed towards newbies, >>>> related with programming and coding, but also connected them with other >>>> activities which recognize that people comes from different backgrounds, >>>> have different interests and that an inclusive tech community is more >>>> than code[2]. The projects will allow newbies to learn coding, but also >>>> to express and connect it with wider concerns (documentation, civic >>>> tech, entrepreneurship, gaming, learning, etc). >>>> >>>> [2] https://morethancode.cc/about/ >>>> >>>> Interested campers will find the different tents where they can join and >>>> the tent leader will prepare a set of (increasingly complex?) activities >>>> for the members of the tent. Campers will work in the activities on a >>>> weekly basis and setup and open source code repository for working >>>> together. >>>> >>>> Coordination language for the Global Campfire will be English for tent >>>> leaders, but campers can use native language for communication between >>>> them and for some activities (local documentation, translations) as we >>>> don't want to impose a unique language to become part of a community and >>>> we recognize active Smalltalkers from around the world that can help >>>> local communities, made them stronger and better connected. >>>> >>>> ## Tent medals >>>> >>>> Becoming part of a open collaborative community is mostly about being >>>> able to help each other and how you and the community create value for >>>> each other. So while this is not a competition, we recognize that small >>>> money can be an important incentive to keep communities dynamic. >>>> >>>> At the end of the Campfire the community will provide with Member Badges >>>> and Tent Medals which recognize the work done by all the participants >>>> and also will give a small money incentive for the tent that made the >>>> best work, so the tent can decide how to spend it better. The evaluation >>>> will be done for each Tent leader, and also two external judges. >>>> >>>> The Tent Medals will be: >>>> >>>> * 1 Gold Medal: XXX Dollars. >>>> * 1 Silver Medal: XYZ Dollars. >>>> * 1 Bronze Medal: ABC Dollars. >>>> >>>> ## Closing >>>> >>>> I really don't know about the details here: How do we assign the prices? >>>> There is any better place that the one referred at [2] to showcase the >>>> important of going beyond code in tech communities? What is the proper >>>> duration for the Campfire? This is just a draft, but I think that this >>>> is something I would like to volunteer for and serves better the need >>>> for new people in our community, and can be also addressed from our >>>> local context and particular projects while connecting more the global >>>> community. >>>> >>>> On 21/11/18 10:23, Ben Coman via Pharo-users wrote: >>> >>> >>> >>> -- >>> Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >>> >>> > > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > >

Nov. 25, 2018

Re: [Pharo-users] Usage of String and FileLocator to reference files in ZipArchive (and probably other places)

by Hans-Martin

I found a related problem which indicates that the depreciation of StandardFileStream in favor of File is incomplete and probably premature: When a ZipArchive is written, in 7.0 it uses (File named: aFileName) writeStreamDo: [...] In 6.1, it uses StandardFileStream forceNewFileNamed: aFileName do: [...] which is a small but significant difference leading to corrupted zip archives when overwriting existing files. File does not have equivalent protocol to #forceNewFileNamed... so it is pretty likely that there are more bugs creeping there. Upon a cursory inspection I see that for example FLFileStreamStrategy will suffer from the same problem when writing to existing files. Is there any documentation on the reasoning of depreciating StandardFileStream and who is working on this? I'm really new to pharo development... Submitting "patches" without knowing the original design rationale seems not very productive. Cheers, Hans-Martin -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Nov. 25, 2018

Re: [Pharo-users] Lambda World 2018 - What FP can learn from Smalltalk by Aditya Siram

by dorellang

Loved the Data Studio part. Didn't know it existed, it looks very powerful! -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Nov. 25, 2018