- Pharo-users - lists.pharo.org

Re: [Pharo-users] Voyage and Instance Mode

by Stephane Ducasse

Can you do a pull request to update the book? Or do we let rot the documentation? Is the same sentence present in the Voyage booklet? Stef On Thu, Jan 25, 2018 at 11:27 PM, Esteban Lorenzano <estebanlm(a)gmail.com> wrote: > > > On 25 Jan 2018, at 23:24, Dominique Dartois <dom(a)dartois.org> wrote: > > Thanks Esteban. > I was fooled by the doc : "In instance mode, the first argument is always > the repository on which to performed the operation"... > Well, not really, but the object to store. > > > yeah, it should say: the receiver. > > > Regards > > 2018-01-25 23:07 GMT+01:00 Esteban Lorenzano <estebanlm(a)gmail.com>: >> >> >> >> > On 25 Jan 2018, at 23:03, Dominique Dartois <dom(a)dartois.org> wrote: >> > >> > Hello all. >> > >> > I'am learning to use Voyage by trying the examples in the Voyage doc (in >> > the Enterprise Pharo book). >> > I read "By default, Voyage works in instance mode". >> > If I run the example in instance mode, I get an error via the debugger. >> > >> > |repo anAssociation| >> > repo := VOMemoryRepository new. >> > anAssociation := #answer -> 42. >> > anAssociation save: repo. >> >> repo save: anAssociation :) >> >> cheers! >> Esteban >> >> > ==> "Instance of Association did not understand #save:" >> > >> > What am I doing wrong? >> > >> > -- >> > Dominique >> >> > > > > -- > Dominique > >

Jan. 27, 2018

Re: [Pharo-users] Download pillar image -> Error 403: Forbidden

by Stephane Ducasse

Hi Hernan On Thu, Jan 25, 2018 at 10:30 PM, HernÃ¡n Morales Durand <hernan.morales(a)gmail.com> wrote: > I am following the Publishing Pillar Booklet guide from here > https://github.com/SquareBracketAssociates/Booklet-PublishingAPillarBooklet pay attention it is not public because it is in flux because we were working on Pillar 70. Now if you follow the readme of pillar-markup/pillar/ it should work since I used it yesterday. $ wget https://raw.githubusercontent.com/pillar-markup/pillar/master/download.sh > $ chmod +x download.sh > $ ./download.sh >./pillar archetype book make book. What you should know is that the stable version sucks at the infrastructure level (relying on too many servers + silent failures in bash files). Can you retry and let me know? BTW why do you want to compile Booklet-PublishingAPillarBooklet/ If you want just create your own repo and do wget https://raw.githubusercontent.com/pillar-markup/pillar/master/download.sh chmod +x download.sh ./download.sh ./pillar archetype book make book. Stef > $ git clone git@github.com:SquareBracketAssociates/Booklet-PublishingAPillarBooklet.git > $ cd Booklet-PublishingAPillarBooklet/ > $ wget https://raw.githubusercontent.com/pillar-markup/pillar/master/download.sh > $ chmod +x download.sh > $ ./download.sh > > --2018-01-25 17:56:32-- http://get.pharo.org/vm50 > Resolving get.pharo.org (get.pharo.org) 164.132.235.17 > Connecting to get.pharo.org (get.pharo.org)|164.132.235.17|:80... connected. > HTTP request sent, awaiting response... 200 OK > Length: 5819 (5.7K) > Saving to: 'STDOUT' > > 0K ..... 100% 371K=0.02s > > 2018-01-25 17:56:33 (371 KB/s) - written to stdout [5819/5819] > > Downloading the latest pharoVM: > http://files.pharo.org/get-files/50/pharo-win-stable.zip > pharo-vm/Pharo.exe > Downloading PharoV50.sources: > http://files.pharo.org/get-files/50/sources.zip > Creating starter scripts pharo and pharo-ui > --2018-01-25 17:57:21-- > https://github.com/pillar-markup/pillar/releases/download/50/Pillar-deploym… > Resolving github.com (github.com) 192.30.253.112, 192.30.253.113 > Connecting to github.com (github.com)|192.30.253.112|:443... connected. > HTTP request sent, awaiting response... 302 Found > Location: https://github-production-release-asset-2e65be.s3.amazonaws.com/41843105/f4… > [following] > --2018-01-25 17:57:23-- > https://github-production-release-asset-2e65be.s3.amazonaws.com/41843105/f4… > Resolving github-production-release-asset-2e65be.s3.amazonaws.com > (github-production-release-asset-2e65be.s3.amazonaws.com) > 54.231.115.35 > Connecting to github-production-release-asset-2e65be.s3.amazonaws.com > (github-production-release-asset-2e65be.s3.amazonaws.com)|54.231.115.35|:443... > connected. > HTTP request sent, awaiting response... 200 OK > Length: 18482449 (18M) [application/octet-stream] > Saving to: 'imageLn5zD.zip' > > imageLn5zD.zip 10%[=> ] 1.88M 502 B/s in 8m 7s > > 2018-01-25 18:15:45 (3.94 KB/s) - Read error at byte 1966661/18482449 > (Bad file descriptor). Retrying. > > --2018-01-25 18:15:46-- (try: 2) > https://github-production-release-asset-2e65be.s3.amazonaws.com/41843105/f4… > Connecting to github-production-release-asset-2e65be.s3.amazonaws.com > (github-production-release-asset-2e65be.s3.amazonaws.com)|54.231.115.35|:443... > connected. > HTTP request sent, awaiting response... 403 Forbidden > 2018-01-25 18:15:47 ERROR 403: Forbidden. > > > Also the download speed was super slow. > > Any ideas? > > Cheers, > > HernÃ¡n >

Jan. 27, 2018

Re: [Pharo-users] Maybe Monad

by Ben Coman

On 27 January 2018 at 08:33, horrido <horrido.hobbies(a)gmail.com> wrote: > Is there a Pharo equivalent to Ruby's Maybe monad? See > https://github.com/rap1ds/ruby-possibly >From that page I read... "Maybe monad is a programming pattern that allows to treat nil values that same way as non-nil values" At a minimum you can just define required methods on UndefinedObject. For example... UndefinedObject >> myThing self inform: 'Nil does my thing!!' then in Playground evaluate... nil myThing This obviously doesn't cover the "Some" part of Maybe-monad, but you didn't provide any description of what you're trying to do so I don't know how important that is to you. However, in general a better approach than adding methods to UndefinedObject if to use the Null pattern. Initialize your variables with an instance of MyDomainNull which defines the minimum required messages to avoid DNUs. Such a class might fit as the root superclass of all your domain classes. But this suggestion might be off target, since I can't grok where I'd use something like Maybe-Monad in my own programming. cheers -ben

Jan. 27, 2018

Maybe Monad

by horrido

Is there a Pharo equivalent to Ruby's Maybe monad? See https://github.com/rap1ds/ruby-possibly -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Jan. 27, 2018

Re: [Pharo-users] looking for another iterator :)

by Sean P. DeNigris

Evan Donahue wrote > It is also worth mentioning that there is now also the Cons library > available > through the Pharo6 catalog browserâ¦ just creates an iterator and never > actually creates the whole listâ¦The code is stable and in use in several > of my projects. Very interesting! Thanks :) ----- Cheers, Sean -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Jan. 26, 2018

GSoC 2018: Old Topics Must Be Removed

by Oleksandr Zaytsev

Hello! I have noticed that some of the projects in Pharo GSOC 2018 Ideas List <http://gsoc.pharo.org/> are copied from last year's list. I've asked people who have been assigned as mentors to these projects and they told me that they will not be mentoring them this year. I have created a pull request <https://github.com/pharo-project/pharo-project-proposals/pull/44> for removing two old projects that I found and discussed with mentors. But there's probably more. I think that the list of ideas has to be thoroughly reviewed and old projects must be removed from it before students start applying for them. Is there someone maintaining that list, who keeps track of all projects and knows which ones to remove? Oleks

Jan. 26, 2018

Re: [Pharo-users] Lengthy operations block UI

by Andrei Stebakov

Basically the test confirms that the long lasting scraping operation returns the expected result . As you suggested let me take a look at Zn On Jan 26, 2018 10:31, "Sven Van Caekenberghe" <sven(a)stfx.eu> wrote: > > > > On 26 Jan 2018, at 16:16, Andrei Stebakov <lispercat(a)gmail.com> wrote: > > > > How do you handle forked operations from TestCase point of view, when > the test expects a value to assert from an asynchronous operation? > > tests typically run sequential & synchronous, it is hard to work with them > otherwise (to debug them, to handle there failures). > > it is of course possible to write much more complex tests, doing all kind > of magic, but well, they are complex and require experience. > > many Zn test run http client against http servers, you could look there > for examples. > > what is your exact scenario or use case ? > > > On Jan 25, 2018 10:41, "Andrei Stebakov" <lispercat(a)gmail.com> wrote: > > Thanks, Sven, got it > > > > On Jan 25, 2018 10:36, "Sven Van Caekenberghe" <sven(a)stfx.eu> wrote: > > Hi Andrei, > > > > > On 25 Jan 2018, at 16:26, Andrei Stebakov <lispercat(a)gmail.com> wrote: > > > > > > I have written some code that has a deep nested loop of calling > ZnClient>>get. > > > In the loop I also execute Transcript>>show but I can only see the > transcript output after a few seconds when the loop is finished. During all > that time while the loop is busy the UI is also unresponsive. > > > Is there a way to execute code in some sort of asynchronous way? > > > > The problem is not specific to using ZnClient, it is with every loop you > execute in the UI thread: the Transcript output is not updated (as it is > the UI thread itself that has to do the drawing). > > > > For example, try > > > > 1 to: 10 do: [ :i | Transcript crShow: i. 5 seconds wait ]. > > > > The solution is to run you long running code in another thread, like this > > > > [ 1 to: 10 do: [ :i | Transcript crShow: i. 5 seconds wait ] ] fork. > > > > HTH, > > > > Sven > > >

Jan. 26, 2018

Re: [Pharo-users] Lengthy operations block UI

by Sven Van Caekenberghe

> On 26 Jan 2018, at 16:16, Andrei Stebakov <lispercat(a)gmail.com> wrote: > > How do you handle forked operations from TestCase point of view, when the test expects a value to assert from an asynchronous operation? tests typically run sequential & synchronous, it is hard to work with them otherwise (to debug them, to handle there failures). it is of course possible to write much more complex tests, doing all kind of magic, but well, they are complex and require experience. many Zn test run http client against http servers, you could look there for examples. what is your exact scenario or use case ? > On Jan 25, 2018 10:41, "Andrei Stebakov" <lispercat(a)gmail.com> wrote: > Thanks, Sven, got it > > On Jan 25, 2018 10:36, "Sven Van Caekenberghe" <sven(a)stfx.eu> wrote: > Hi Andrei, > > > On 25 Jan 2018, at 16:26, Andrei Stebakov <lispercat(a)gmail.com> wrote: > > > > I have written some code that has a deep nested loop of calling ZnClient>>get. > > In the loop I also execute Transcript>>show but I can only see the transcript output after a few seconds when the loop is finished. During all that time while the loop is busy the UI is also unresponsive. > > Is there a way to execute code in some sort of asynchronous way? > > The problem is not specific to using ZnClient, it is with every loop you execute in the UI thread: the Transcript output is not updated (as it is the UI thread itself that has to do the drawing). > > For example, try > > 1 to: 10 do: [ :i | Transcript crShow: i. 5 seconds wait ]. > > The solution is to run you long running code in another thread, like this > > [ 1 to: 10 do: [ :i | Transcript crShow: i. 5 seconds wait ] ] fork. > > HTH, > > Sven

Jan. 26, 2018

Re: [Pharo-users] Lengthy operations block UI

by Andrei Stebakov

How do you handle forked operations from TestCase point of view, when the test expects a value to assert from an asynchronous operation? On Jan 25, 2018 10:41, "Andrei Stebakov" <lispercat(a)gmail.com> wrote: > Thanks, Sven, got it > > On Jan 25, 2018 10:36, "Sven Van Caekenberghe" <sven(a)stfx.eu> wrote: > >> Hi Andrei, >> >> > On 25 Jan 2018, at 16:26, Andrei Stebakov <lispercat(a)gmail.com> wrote: >> > >> > I have written some code that has a deep nested loop of calling >> ZnClient>>get. >> > In the loop I also execute Transcript>>show but I can only see the >> transcript output after a few seconds when the loop is finished. During all >> that time while the loop is busy the UI is also unresponsive. >> > Is there a way to execute code in some sort of asynchronous way? >> >> The problem is not specific to using ZnClient, it is with every loop you >> execute in the UI thread: the Transcript output is not updated (as it is >> the UI thread itself that has to do the drawing). >> >> For example, try >> >> 1 to: 10 do: [ :i | Transcript crShow: i. 5 seconds wait ]. >> >> The solution is to run you long running code in another thread, like this >> >> [ 1 to: 10 do: [ :i | Transcript crShow: i. 5 seconds wait ] ] fork. >> >> HTH, >> >> Sven >> >

Jan. 26, 2018

Re: [Pharo-users] looking for another iterator :)

by Steffen MÃ¤rcker

Hi! No stress is good news! > - what is the API in terms of vocabulary (ie drop the same as reject) These are the operations implemented so far. |= means "satisfies", i.e., evaluate to true. Drop drop first n elements DropWhile drop first elements |= a block Filter* pick only elements |= a block Keep* only use elements ~= nil Map* map each element MapKeys* map each element an use as key Partition split after n elements PartitionBy split after elements |= a block RandomSample* pick elements with probability p Reductions intermediate results of reduce Remove* = Filter not Replace* replace elements by LUT Cat* concatenate sequences Dedupe remove consecutive duplicates Flatten* flatten nested sequence Take pick first n elements TakeNth pick every n-th element TakeWhile pick first elements |= a block Tee UNIX tee, concurrent evaluation Note, * means that the operation is parallelizable. As the operations are independent of the sequence class, the apply naturally to all kinds of sources, like collections, streams, channels and so on. > - can we reexpress some of our iterators? Most of them. For example, generic for all collections: collect: aBlock ^self class <~ aBlock map <~ self reject: aBlock ^self class <~ ablock remove <~ self select: aBlock ^self class <~ aBlock filter <~ self As said before, names are not fixed yet and there is a more classical API on top available, too: collect: aBlock ^(self transduce map: aBlock) into: self class > - what is the cost? Very little. In detail: 1) Upfront there is the constant cost of instantiating the tranducers. 2) The linear cost of evaluating a nested block for each element. This is likely to be optimized by the JIT, as the structure is very regular. I only did some micro-benchmarks which showed little to none impact on performance so far. Best, Steffen

Jan. 26, 2018