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

Re: [Pharo-users] Slots and Metalink

by Steven Costiou

Also, I do not think metalinks could work on #write:to: method from slots, because that method is not used at runtime (I do not remember exactly but maybe somebody knows the details...). Le 2019-04-03 16:20, Steven Costiou a Ã©crit : > Hi, > > if you are using Pharo7, you could do either on a class (affects all instances) or on an object (affects only the target instance): > >> classOrObject link: yourMetaLink toSlotNamed: #slotName option: #write > > It will install the metalink on all write accesses to the slot. > > Note that if you target a single object, it will be migrated to an anonymous subclass for the metalink to be object-specific. > > In both cases, if you add or remove inst-var accesses, the metalink should update automatically. > > Steven. > > Le 2019-04-03 15:57, Vitor Medina Cruz a Ã©crit : > >> Hello, >> >> Is it possible to intercept a slot store? I tried with a before metalink into #write:to selector, but it don't seems to work. Should I use another selector? >> >> I would like to experiment with ivar change notification, but I don't know what is the better approach. I know I could install a MetaLink in an attribution node, but that seems ankward and I would have to edit the linkage every time my object is changed, isn't true? >> >> Regards, >> Vitor

April 3, 2019

Re: [Pharo-users] Slots and Metalink

by Steven Costiou

Hi, if you are using Pharo7, you could do either on a class (affects all instances) or on an object (affects only the target instance): > classOrObject link: yourMetaLink toSlotNamed: #slotName option: #write It will install the metalink on all write accesses to the slot. Note that if you target a single object, it will be migrated to an anonymous subclass for the metalink to be object-specific. In both cases, if you add or remove inst-var accesses, the metalink should update automatically. Steven. Le 2019-04-03 15:57, Vitor Medina Cruz a Ã©crit : > Hello, > > Is it possible to intercept a slot store? I tried with a before metalink into #write:to selector, but it don't seems to work. Should I use another selector? > > I would like to experiment with ivar change notification, but I don't know what is the better approach. I know I could install a MetaLink in an attribution node, but that seems ankward and I would have to edit the linkage every time my object is changed, isn't true? > > Regards, > Vitor

April 3, 2019

Slots and Metalink

by Vitor Medina Cruz

Hello, Is it possible to intercept a slot store? I tried with a before metalink into #write:to selector, but it don't seems to work. Should I use another selector? I would like to experiment with ivar change notification, but I don't know what is the better approach. I know I could install a MetaLink in an attribution node, but that seems ankward and I would have to edit the linkage every time my object is changed, isn't true? Regards, Vitor

April 3, 2019

Re: [Pharo-users] What's wrong with latest Pharo?

by Ben Coman

On Wed, 3 Apr 2019 at 05:09, Richard O'Keefe <raoknz(a)gmail.com> wrote: > I just did a complete reinstall of Ubuntu 18.4 on this > laptop yesterday, > > and it did not come with any version of curl. > What do you mean? Under WSL I have installed Ubuntu 18.4 and for... $ apt-cache search libcurl | less I see libcurl3 and libcurl4 cheers -ben > uname -a => > Linux Inspiron 4.18.0-16-generic #17~18.04.1-Ubuntu SMP Tue Feb 12 > 13:35:51 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux > > > > On Wed, 3 Apr 2019 at 01:27, Vitor Medina Cruz <vitormcruz(a)gmail.com> > wrote: > >> Installing curl don't work because there is a conflict between curl >> version name used on Ubuntu and that used by Pharo, you can't install >> libcurl 3 and libcru4 together. Ubuntu 18 comes with libcurl4 and older >> software depending on libcurl3 broke with it. I tested with minidebian and >> it also failed. >> >> Richard, was you able to use Iceberg? It should only work if either >> Ubuntu fix this dependency problem with libcurl or Pharo started to use >> libcrl4. >> >> >> >> On Tue, Apr 2, 2019 at 5:50 AM Richard O'Keefe <raoknz(a)gmail.com> wrote: >> >>> I have Pharo 6.1 and Pharo 7.0 working in Ubuntu 18.04 >>> with no trouble so far. I just downloaded the launcher >>> from pharo.org and pulled the images down that way. >>> >>> One thing I do find annoying in Ubuntu 18.04 is the >>> number of programs (like okular) that spew warning >>> messages out the terminal. Pharo, sadly, is one of >>> them. Whenever a debugger window comes up in Pharo >>> there is spewage on the terminal. But it works. >>> >>> >>> On Tue, 2 Apr 2019 at 13:07, john pfersich <jpfersich(a)gmail.com> wrote: >>> >>>> Ubuntu 18.04 LTS is, IMHO, is royal piece of crap. Ubuntu seems to have >>>> abandoned programmers tools almost completely in 18.04. Iâve had more >>>> problems with support of programming tools in 18.04, more than even >>>> Windows. I have run âsudo apt installâ maybe 80 times to install tools and >>>> libraries. Ubuntu 18.04âs hardware support is also lame compared to 16.04. >>>> Personally , Iâm not surprised that Pharo doesnât run on 18.04. I >>>> stopped installing 18.04 on my new machines, after all 16.04 still has a >>>> few years of support going for it, and at least it works without hours of >>>> upgrading. >>>> >>>> /*âââââââââââââââââ-*/ >>>> Sent from my iPhone >>>> https://boincstats.com/signature/-1/user/51616339056/sig.png >>>> See https://objectnets.net and https://objectnets.org >>>> >>>> > On Apr 1, 2019, at 06:06, horrido <horrido.hobbies(a)gmail.com> wrote: >>>> > >>>> > This issue bit me in the ass before, but I forgot. Yes, I had a senior >>>> > moment. >>>> > >>>> > The issue is this: When I tried to run Pharo under Ubuntu Server >>>> 18.04 at >>>> > OVH last year, it failed. I had to fall back to Ubuntu Server 16.04. >>>> > >>>> > This week, I tried to run Pharo under Ubuntu Server 18.04 at Google >>>> Cloud >>>> > Platform and it failed. Again, I had to fall back to Ubuntu Server >>>> 16.04. >>>> > >>>> > Why does this issue keep biting me in the ass??? Because I'm 65 and >>>> my brain >>>> > is dying. >>>> > >>>> > The bigger issue is this: Hosting services like Digital Ocean, OVH, >>>> and >>>> > Google Cloud Platform are becoming increasingly important in the >>>> enterprise >>>> > space. If Pharo can't run on these server operating systems, it's >>>> going to >>>> > be a black eye for the language. We can get away with not supporting >>>> this >>>> > for now, but it will eventually catch up with us. >>>> > >>>> > At Google Cloud Platform, for example, the user can choose from this >>>> list of >>>> > hosts: Debian GNU/Linux 9 (Stretch), CentOS 6, CentOS 7, various >>>> versions of >>>> > CoreOS, Ubuntu 14.04 LTS Minimal, Ubuntu 16.04 LTS Minimal, Ubuntu >>>> 18.04 LTS >>>> > Minimal, Ubuntu 18.10 Minimal, various versions of Red Hat, various >>>> versions >>>> > of SUSE, various versions of Window, and so on. It's a long list. *I >>>> > strongly suspect that many of these are unusable with Pharo.* >>>> > >>>> > How to address this? I don't know. But if it's not a major problem >>>> now, it >>>> > will be. It's bitten me in the ass twice, and I can't be alone. >>>> > >>>> > I'm giving a fair warning to everyone. Don't lash back at me â I'm >>>> just the >>>> > canary in the coal mine. >>>> > >>>> > >>>> > >>>> > >>>> > Tim Mackinnon wrote >>>> >> Come on, letâs try not to be dismissive , weâve all had that annoying >>>> >> moment where something doesnât work. >>>> >> >>>> >> Richard, was this installed with zero conf or Launcher, and as >>>> mentioned - >>>> >> a Linux distro is going to be helpful. >>>> >> >>>> >> Iâm assuming it worked before at some point for you right? But was >>>> that v6 >>>> >> and now youâre trying v7? >>>> >> >>>> >> Tim >>>> >> >>>> >> >>>> >> Sent from my iPhone >>>> >> >>>> >>> On 31 Mar 2019, at 23:46, john pfersich < >>>> > >>>> >> jpfersich@ >>>> > >>>> >> > wrote: >>>> >>> >>>> >>> What Linux (distro and version) and which version of Pharo. You >>>> couldnât >>>> >>> supply less information if you tried. >>>> >>> >>>> >>> >>>> >>> /*âââââââââââââââââ-*/ >>>> >>> Sent from my iPhone >>>> >>> https://boincstats.com/signature/-1/user/51616339056/sig.png >>>> >>> See https://objectnets.net and https://objectnets.org >>>> >>> >>>> >>>> On Mar 31, 2019, at 14:21, Richard Kenneth Eng < >>>> > >>>> >> horrido.hobbies@ >>>> > >>>> >> > wrote: >>>> >>>> >>>> >>>> I just installed Pharo under Linux and when I start it up, I get: >>>> >>>> >>>> >>>> Error: External module not found >>>> >>>> >>>> >>>> It doesn't matter how I install Pharo. >>>> > >>>> > >>>> > >>>> > >>>> > >>>> > -- >>>> > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >>>> > >>>> >>>>

April 3, 2019

Re: [Pharo-users] Comment on: Pharo performance issues

by Marcus Denker

> > I spent quite some time with Alexandre Bergel's NeuralNetwork implementation and stumbled across many implementations that cause general performance issues. > > While, I "fixed/altered" only those parts affecting my code, I would offer to search trough the image an alter the parts similar to those already altered. > > In such case that somebody would like to move a greater amount of code towards review and integration into current development how would the process of such contribution look like? > > The regular path of reporting bugs, or just forking on Github and pull request? The best is to first report an issue, then do a pull request. There is a pointer to a tutorial here: https://github.com/pharo-project/pharo/blob/Pharo8.0/CONTRIBUTING.md <https://github.com/pharo-project/pharo/blob/Pharo8.0/CONTRIBUTING.md> (If you get stuck somewhere, please tellâ¦ I think it might needs some update for Pharo8, it is on my TODO to check it carefully) > > I am extremely busy right now, but during the nights I could slowly attempt to work some performance issues out. > That would be great! Marcus

April 3, 2019

Re: [Pharo-users] What's wrong with latest Pharo?

by Richard O'Keefe

I just did a complete reinstall of Ubuntu 18.4 on this laptop yesterday, and it did not come with any version of curl. uname -a => Linux Inspiron 4.18.0-16-generic #17~18.04.1-Ubuntu SMP Tue Feb 12 13:35:51 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux On Wed, 3 Apr 2019 at 01:27, Vitor Medina Cruz <vitormcruz(a)gmail.com> wrote: > Installing curl don't work because there is a conflict between curl > version name used on Ubuntu and that used by Pharo, you can't install > libcurl 3 and libcru4 together. Ubuntu 18 comes with libcurl4 and older > software depending on libcurl3 broke with it. I tested with minidebian and > it also failed. > > Richard, was you able to use Iceberg? It should only work if either Ubuntu > fix this dependency problem with libcurl or Pharo started to use libcrl4. > > > > On Tue, Apr 2, 2019 at 5:50 AM Richard O'Keefe <raoknz(a)gmail.com> wrote: > >> I have Pharo 6.1 and Pharo 7.0 working in Ubuntu 18.04 >> with no trouble so far. I just downloaded the launcher >> from pharo.org and pulled the images down that way. >> >> One thing I do find annoying in Ubuntu 18.04 is the >> number of programs (like okular) that spew warning >> messages out the terminal. Pharo, sadly, is one of >> them. Whenever a debugger window comes up in Pharo >> there is spewage on the terminal. But it works. >> >> >> On Tue, 2 Apr 2019 at 13:07, john pfersich <jpfersich(a)gmail.com> wrote: >> >>> Ubuntu 18.04 LTS is, IMHO, is royal piece of crap. Ubuntu seems to have >>> abandoned programmers tools almost completely in 18.04. Iâve had more >>> problems with support of programming tools in 18.04, more than even >>> Windows. I have run âsudo apt installâ maybe 80 times to install tools and >>> libraries. Ubuntu 18.04âs hardware support is also lame compared to 16.04. >>> Personally , Iâm not surprised that Pharo doesnât run on 18.04. I >>> stopped installing 18.04 on my new machines, after all 16.04 still has a >>> few years of support going for it, and at least it works without hours of >>> upgrading. >>> >>> /*âââââââââââââââââ-*/ >>> Sent from my iPhone >>> https://boincstats.com/signature/-1/user/51616339056/sig.png >>> See https://objectnets.net and https://objectnets.org >>> >>> > On Apr 1, 2019, at 06:06, horrido <horrido.hobbies(a)gmail.com> wrote: >>> > >>> > This issue bit me in the ass before, but I forgot. Yes, I had a senior >>> > moment. >>> > >>> > The issue is this: When I tried to run Pharo under Ubuntu Server 18.04 >>> at >>> > OVH last year, it failed. I had to fall back to Ubuntu Server 16.04. >>> > >>> > This week, I tried to run Pharo under Ubuntu Server 18.04 at Google >>> Cloud >>> > Platform and it failed. Again, I had to fall back to Ubuntu Server >>> 16.04. >>> > >>> > Why does this issue keep biting me in the ass??? Because I'm 65 and my >>> brain >>> > is dying. >>> > >>> > The bigger issue is this: Hosting services like Digital Ocean, OVH, and >>> > Google Cloud Platform are becoming increasingly important in the >>> enterprise >>> > space. If Pharo can't run on these server operating systems, it's >>> going to >>> > be a black eye for the language. We can get away with not supporting >>> this >>> > for now, but it will eventually catch up with us. >>> > >>> > At Google Cloud Platform, for example, the user can choose from this >>> list of >>> > hosts: Debian GNU/Linux 9 (Stretch), CentOS 6, CentOS 7, various >>> versions of >>> > CoreOS, Ubuntu 14.04 LTS Minimal, Ubuntu 16.04 LTS Minimal, Ubuntu >>> 18.04 LTS >>> > Minimal, Ubuntu 18.10 Minimal, various versions of Red Hat, various >>> versions >>> > of SUSE, various versions of Window, and so on. It's a long list. *I >>> > strongly suspect that many of these are unusable with Pharo.* >>> > >>> > How to address this? I don't know. But if it's not a major problem >>> now, it >>> > will be. It's bitten me in the ass twice, and I can't be alone. >>> > >>> > I'm giving a fair warning to everyone. Don't lash back at me â I'm >>> just the >>> > canary in the coal mine. >>> > >>> > >>> > >>> > >>> > Tim Mackinnon wrote >>> >> Come on, letâs try not to be dismissive , weâve all had that annoying >>> >> moment where something doesnât work. >>> >> >>> >> Richard, was this installed with zero conf or Launcher, and as >>> mentioned - >>> >> a Linux distro is going to be helpful. >>> >> >>> >> Iâm assuming it worked before at some point for you right? But was >>> that v6 >>> >> and now youâre trying v7? >>> >> >>> >> Tim >>> >> >>> >> >>> >> Sent from my iPhone >>> >> >>> >>> On 31 Mar 2019, at 23:46, john pfersich < >>> > >>> >> jpfersich@ >>> > >>> >> > wrote: >>> >>> >>> >>> What Linux (distro and version) and which version of Pharo. You >>> couldnât >>> >>> supply less information if you tried. >>> >>> >>> >>> >>> >>> /*âââââââââââââââââ-*/ >>> >>> Sent from my iPhone >>> >>> https://boincstats.com/signature/-1/user/51616339056/sig.png >>> >>> See https://objectnets.net and https://objectnets.org >>> >>> >>> >>>> On Mar 31, 2019, at 14:21, Richard Kenneth Eng < >>> > >>> >> horrido.hobbies@ >>> > >>> >> > wrote: >>> >>>> >>> >>>> I just installed Pharo under Linux and when I start it up, I get: >>> >>>> >>> >>>> Error: External module not found >>> >>>> >>> >>>> It doesn't matter how I install Pharo. >>> > >>> > >>> > >>> > >>> > >>> > -- >>> > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >>> > >>> >>>

April 2, 2019

Comment on: Pharo performance issues

by Sebastian Heidbrink

Hi! A friend of mine just just pointed this entry out to me https://pharoweekly.wordpress.com/2019/04/02/about-performance-issues/ I spent quite some time with Alexandre Bergel's NeuralNetwork implementation and stumbled across many implementations that cause general performance issues. While, I "fixed/altered" only those parts affecting my code, I would offer to search trough the image an alter the parts similar to those already altered. In such case that somebody would like to move a greater amount of code towards review and integration into current development how would the process of such contribution look like? The regular path of reporting bugs, or just forking on Github and pull request? I am extremely busy right now, but during the nights I could slowly attempt to work some performance issues out. Kind wishes, Sebastian

April 2, 2019

Re: [Pharo-users] What's wrong with latest Pharo?

by Vitor Medina Cruz

Installing curl don't work because there is a conflict between curl version name used on Ubuntu and that used by Pharo, you can't install libcurl 3 and libcru4 together. Ubuntu 18 comes with libcurl4 and older software depending on libcurl3 broke with it. I tested with minidebian and it also failed. Richard, was you able to use Iceberg? It should only work if either Ubuntu fix this dependency problem with libcurl or Pharo started to use libcrl4. On Tue, Apr 2, 2019 at 5:50 AM Richard O'Keefe <raoknz(a)gmail.com> wrote: > I have Pharo 6.1 and Pharo 7.0 working in Ubuntu 18.04 > with no trouble so far. I just downloaded the launcher > from pharo.org and pulled the images down that way. > > One thing I do find annoying in Ubuntu 18.04 is the > number of programs (like okular) that spew warning > messages out the terminal. Pharo, sadly, is one of > them. Whenever a debugger window comes up in Pharo > there is spewage on the terminal. But it works. > > > On Tue, 2 Apr 2019 at 13:07, john pfersich <jpfersich(a)gmail.com> wrote: > >> Ubuntu 18.04 LTS is, IMHO, is royal piece of crap. Ubuntu seems to have >> abandoned programmers tools almost completely in 18.04. Iâve had more >> problems with support of programming tools in 18.04, more than even >> Windows. I have run âsudo apt installâ maybe 80 times to install tools and >> libraries. Ubuntu 18.04âs hardware support is also lame compared to 16.04. >> Personally , Iâm not surprised that Pharo doesnât run on 18.04. I stopped >> installing 18.04 on my new machines, after all 16.04 still has a few years >> of support going for it, and at least it works without hours of upgrading. >> >> /*âââââââââââââââââ-*/ >> Sent from my iPhone >> https://boincstats.com/signature/-1/user/51616339056/sig.png >> See https://objectnets.net and https://objectnets.org >> >> > On Apr 1, 2019, at 06:06, horrido <horrido.hobbies(a)gmail.com> wrote: >> > >> > This issue bit me in the ass before, but I forgot. Yes, I had a senior >> > moment. >> > >> > The issue is this: When I tried to run Pharo under Ubuntu Server 18.04 >> at >> > OVH last year, it failed. I had to fall back to Ubuntu Server 16.04. >> > >> > This week, I tried to run Pharo under Ubuntu Server 18.04 at Google >> Cloud >> > Platform and it failed. Again, I had to fall back to Ubuntu Server >> 16.04. >> > >> > Why does this issue keep biting me in the ass??? Because I'm 65 and my >> brain >> > is dying. >> > >> > The bigger issue is this: Hosting services like Digital Ocean, OVH, and >> > Google Cloud Platform are becoming increasingly important in the >> enterprise >> > space. If Pharo can't run on these server operating systems, it's going >> to >> > be a black eye for the language. We can get away with not supporting >> this >> > for now, but it will eventually catch up with us. >> > >> > At Google Cloud Platform, for example, the user can choose from this >> list of >> > hosts: Debian GNU/Linux 9 (Stretch), CentOS 6, CentOS 7, various >> versions of >> > CoreOS, Ubuntu 14.04 LTS Minimal, Ubuntu 16.04 LTS Minimal, Ubuntu >> 18.04 LTS >> > Minimal, Ubuntu 18.10 Minimal, various versions of Red Hat, various >> versions >> > of SUSE, various versions of Window, and so on. It's a long list. *I >> > strongly suspect that many of these are unusable with Pharo.* >> > >> > How to address this? I don't know. But if it's not a major problem now, >> it >> > will be. It's bitten me in the ass twice, and I can't be alone. >> > >> > I'm giving a fair warning to everyone. Don't lash back at me â I'm just >> the >> > canary in the coal mine. >> > >> > >> > >> > >> > Tim Mackinnon wrote >> >> Come on, letâs try not to be dismissive , weâve all had that annoying >> >> moment where something doesnât work. >> >> >> >> Richard, was this installed with zero conf or Launcher, and as >> mentioned - >> >> a Linux distro is going to be helpful. >> >> >> >> Iâm assuming it worked before at some point for you right? But was >> that v6 >> >> and now youâre trying v7? >> >> >> >> Tim >> >> >> >> >> >> Sent from my iPhone >> >> >> >>> On 31 Mar 2019, at 23:46, john pfersich < >> > >> >> jpfersich@ >> > >> >> > wrote: >> >>> >> >>> What Linux (distro and version) and which version of Pharo. You >> couldnât >> >>> supply less information if you tried. >> >>> >> >>> >> >>> /*âââââââââââââââââ-*/ >> >>> Sent from my iPhone >> >>> https://boincstats.com/signature/-1/user/51616339056/sig.png >> >>> See https://objectnets.net and https://objectnets.org >> >>> >> >>>> On Mar 31, 2019, at 14:21, Richard Kenneth Eng < >> > >> >> horrido.hobbies@ >> > >> >> > wrote: >> >>>> >> >>>> I just installed Pharo under Linux and when I start it up, I get: >> >>>> >> >>>> Error: External module not found >> >>>> >> >>>> It doesn't matter how I install Pharo. >> > >> > >> > >> > >> > >> > -- >> > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >> > >> >>

April 2, 2019

[ANN] Pharo Workshops in Switzerland: April 30 to May 3rd

by Marcus Denker

Hi, Kertyx is organising a Workshop Series, the Digital Healthcare Innovation Workshops Part of this series will be a workshop around Pharo: Interactive and efficient ways to build technology stacks for experienced developers. - Where? Lavigny/Switzerland - When? April 30 to May 3 - Event web site: http://kertyx.events â¢ Workshop 1 â Introduction to Pharo (Marcus Denker) â¢ Workshop 2 â Web development using Seaside (Cyril Ferlicot) â¢ Workshop 3 â New Integrated Development Environment (IDE) â Glamorous Toolkit (Tudor Girba) Registration via eventbrite is available for all 3 workshops independently at http://kertyx.events Marcus

April 2, 2019

Google Protobuf - Small update and parsing a tensorflow GraphDef

by Holger Freyther

A short update on the current state of my implementation. I heard there is interest to use it to parse tensor flow models. 0.) Load the BaselineOfProtobuf from https://github.com/zecke/pharo-protobuf 1.) Generate code Use the Google protoc to generate a descriptor set: $ protoc -o tf.pb --include_imports tensorflow/core/framework/graph.proto And then use this descriptor to generate code: | descriptor nameTable generator | descriptor := GPBFileDescriptorSet materializeFrom: 'tf.pb' asFileReference binaryReadStream. nameTable := GPBTypeNamesVisitor new. nameTable customPrefix: 'TF_'. generator := GPBGeneratingVisitor new typeNames: nameTable; targetPackage: 'Tensorflow-Definitions'. descriptor visit: nameTable. generator visit: descriptor. 2.) Parse a model (e.g. the inception v3 model) TF_GraphDef materializeFrom: 'inception_v3_2016_08_28_frozen.pb' asFileReference binaryReadStream 3.) ??? I guess load it into tensorflow? I am not sure if the endianness for the Float is correct (if not the weights are wrong so please be careful and have a look). There are still plenty of TODOs left. JSON and TextProto parsing needs to be implemented. Working on the official regression suite is needed as well. Strict/Non-strict modes for parsing are needed as well.

April 2, 2019