- Pharo-users - lists.pharo.org

Re: [Pharo-users] how to -- buffered read / write to stdio

by Alistair Grant

Hi Isaac, On Wed, 27 Mar 2019 at 17:18, Isaac Gouy via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > From â "Pharo 7 file streams guideline" > > https://github.com/pavel-krivanek/pharoMaterials/blob/master/Filestreams.MD > > > I have some ideas like â > > in := ZnFastLineReader on: (ZnCharacterReadStream on: Stdio stdin). out := ZnBufferedWriteStream on: > (ZnCharacterWriteStream on: Stdio stdout). > > > What would be faster / better / more Pharo ways to do buffered reads and buffered writes to stdio ? This is heading in the right direction. The buffered wrappers are normally placed on the underlying binary stream, and then wrapped with the encoder / decoder. Follow through FileReference>>writeStream and FileReference>>readStream to see how it is done for files. in := ZnFastLineReader on: (ZnCharacterReadStream on: (ZnBufferedReadStream on: Stdio stdin)). out := ZnCharacterWriteStream on: (ZnBufferedWriteStream on: Stdio stdout). Note that if you're doing terminal IO you'll need to handle stdin differently. If you're writing to a terminal on Linux / MacOS you'll need to use LFs instead of Pharo's standard CRs, so it may be worthwhile adding ZnNewLineWriterStream on: out. HTH, Alistair

March 27, 2019

Re: [Pharo-users] More info & examples on MAAdaptiveModel ?

by Sean P. DeNigris

Pharo Smalltalk Users mailing list wrote > I am looking for more info or usage examples of MAAdaptiveModel. The Nabble mirror site provides convenient search across many Smalltalk MLs. I don't know if any of these help, but there are several hits: http://forum.world.st/template/NamlServlet.jtp?macro=search_page&node=12947… ----- Cheers, Sean -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

March 27, 2019

how to -- buffered read / write to stdio

by Isaac Gouy

>From â "Pharo 7 file streams guideline" https://github.com/pavel-krivanek/pharoMaterials/blob/master/Filestreams.MD I have some ideas like â Â Â in := ZnFastLineReader on: Â Â Â Â Â (ZnCharacterReadStream on: Stdio stdin).Â Â out := ZnBufferedWriteStream on: Â Â Â Â Â (ZnCharacterWriteStream on: Stdio stdout). What would be faster / better / more Pharo ways to do buffered reads and buffered writes to stdio ?

March 27, 2019

Re: [Pharo-users] Smalltalk CI - anyone have any luck excluding tests?

by Guillermo Polito

Hi Tim, I got something like what you describe that working for pillar and OSSubprocess, but putting different tests in different packages, not tags. https://github.com/pillar-markup/pillar https://github.com/pharo-contributions/OSSubprocess On Tue, Mar 12, 2019 at 6:00 PM Tim Mackinnon <tim(a)testit.works> wrote: > FYI: Just bumping this - but on investigation it looks like the Pharo > support for Tags breaks in Smalltalk CI - so top level packages with > similar names (e.g. Exercism and ExercismWIP) all seem to get included by > the include directive of âExercismâ (with no wildcard). > > This is in an issue: https://github.com/hpi-swa/smalltalkCI/issues/417 > > It does mean that many of you might be running more tests than you need > to, and it might explain strange build failures if you are trying to use > exclude. > > At some point I will have a go at fixing this, if someone doesnât beat me > to it. > > Tim > > On 6 Mar 2019, at 09:10, Tim Mackinnon <tim(a)testit.works> wrote: > > As part of Exercism we have to show our language track can build and run > tests - and they use Travis - so, pretty awesome we have that tooling. > > So it was pretty straightforward t hook in - and there are enough examples > around to support the docs for the .yml and .ston file - however I hit an > issue with the inclusion and exclusion of test files. I put an issue on > SmalltalkCI - but its sat there for 8days ( > https://github.com/hpi-swa/smalltalkCI/issues/417) so Iâm wondering if > anyone has experience with this? > > Essentially if I include my other packages âExercismDevâ and > âExercismToolsâ (see sample below - Iâve removed them from the include > list) then some of my tests run twice (I believe because the exclude of > #AllExercismTests doesnât work). I also have some environmental tests that > need improving to run more generically (Submit/Download) and again those > donât seem to be excluded. > > Itâs like âexclude" simply doesnât work - but I would think this would be > reported more widely if this was the case. So maybe I donât understand the > overlap of include/exclude etc. Anyone have any thoughts? > > Tim > > SmalltalkCISpec { > #loading : [ > SCIMetacelloLoadSpec { > #baseline : 'Exercism', > #directory : 'dev/src', > #load : [ 'dev' ], > > #platforms : [ #pharo ] > } > ], > > #testing : { > #include : { > #packages : [ 'Exercism' ] > }, > #exclude : { > #classes : [ #AllExercismTests, #ExercismTest, #ExercismSubmitTest, #ExercismDownloadTest ], > #packages : [ 'ExercismWIP'] > } > } > } > > > > -- Guille Polito Research Engineer Centre de Recherche en Informatique, Signal et Automatique de Lille CRIStAL - UMR 9189 French National Center for Scientific Research - *http://www.cnrs.fr <http://www.cnrs.fr>* *Web:* *http://guillep.github.io* <http://guillep.github.io> *Phone: *+33 06 52 70 66 13

March 27, 2019

Re: [Pharo-users] how to convert this with a stream

by Roelof Wobben

March 27, 2019

Re: [Pharo-users] how to convert this with a stream

by Richard O'Keefe

"I have a SortedCollection of Teams. Now I need to convert *it* to a line like ...". Well, no. You need to convert *each team* separately to such a line. So something like aStream nextPutAll: '...header line...'; cr. mySortedTeams do: [:eachTeam | -write a formatted line describing eachTeam to aStream]. Now it gets interesting. Whose responsibility is it to write a representation of a Team instance to a stream? Should it be done by the Team instance, or should it be done outside? Question 1: is there obviously one and only one format, or do you think that in a more realistic example there might be more than one way to print a Team object? I concluded that there might be many different ways to do it. (I personally dislike putting variable length fields on the left.) Question 2: *Can* it be done from the outside or *must* it be done inside? Is there any information in the printed representation that the caller cannot ask the team object for? In this case, all of the information is available through Team's public interface. Question 3: Should Teams and printing be *coupled*? Should a Team know about details like the dividing line between columns? In this case, I decided that putting the formatting code inside the Team object was highly undesirable coupling. Question 4: Is it *possible* for a Team object to do the formatting without knowing about all the other Teams in the collection? In this case, the specification is rather vague. It seemed to me that all the numeric columns should be the same width and should be wide enough to hold the largest number with a space on each side. In answer to question 4, my Tournament code contains w := mySortedTeams inject: 1 into: [:acc :team | (team matchCount max: team points) printString size max: acc]. and this clearly requires knowledge of all the teams, so it makes no sense to put it in Team. (Of course, if the column widths are fixed, this argument fails, but such a choice makes no sense for large problems.) So now you need something like aStream nextPutAll: team name; space: 30 - team name size. and then a numeric value might be written as aStream nextPutAll: ' | '; space: w - team points printString size; print: team points. Please do not use << . Historically, << had no meaning in Smalltalk. In some Smalltalks it means leftwards bit shift. It is just too confusing. (In a shell, you would use > for output, not <<, which is used for a kind of input.) It is really weird to use s << String cr instead of s cr. So idomatic Smalltalk would be s nextPutAll: t name; cr. Why are you writing to (an output stream over) an Array? Surely you want a String? But in any case, I would split this into two methods: printTeams: teams on: aStream -- print heading -- -- print each team -- printTeamsAsString: teams ^String streamContents: [:s | self printTeams: teams on:s] On Wed, 27 Mar 2019 at 07:12, Roelof Wobben <r.wobben(a)home.nl> wrote: > Hello, > > I have a SortedCollection of teams. > > Now I need to convert this to a line like this : > > 'Allegoric Alaskans | 1 | 1 | 0 | 0 | 3' > > I tried it with this : > > outcome := Array > streamContents: [ :s | > TeamStatusSorted > do: [ :each | > s << each name. > s << String cr ] ]. > ^ outcome > > > or String streamContents but it will not give me the right answer, > So please some hints how I can make this work. > > Roelof > > >

March 27, 2019

More info & examples on MAAdaptiveModel ?

by Albrecht Baur

Hi all, I am looking for more info or usage examples of MAAdaptiveModel. So far I found the following good resources: * The masters thesis of Lukas Renggli and the impl. of Pier: http://sdmeta.gforge.inria.fr/Teaching/Lille/0910-MetaModelisation/Magritte… * In the package Magritte-Tests-Model: The test MAAdaptiveModelTest Could someone point me to more resources on MAAdaptiveModel if there are any? Especially the topic searching / building search indexes on MAAdaptiveModel data stored e.g. in mongodb as voyage root would be helpful. -> How is the performance when searching on MAAdaptiveModel values with and without index ? Hints would be nice! Albrecht

March 27, 2019

Re: [Pharo-users] how to convert this with a stream

by Roelof Wobben

Carlo, Thanks, This gives the output I expect outcome Â Â Â Â Â Â add: 'TeamÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â | MP |Â W |Â D |Â L |Â P'. Â Â Â outcome Â Â Â Â Â Â add: Â Â Â Â Â Â Â Â Â (String Â Â Â Â Â Â Â Â Â Â Â Â streamContents: [ :s | Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â TeamStatusSorted Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â do: [ :each | Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â s << each name. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â s << 'Â Â Â Â Â Â Â Â Â Â Â '. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â s << ' |Â '. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â s << each totalPlayed. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â s << ' |Â '. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â s << each winCount. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â s << String cr ] ]). Â Â Â ^ outcome but I think its ugly. Hopefully someone can give me hints how to improve this . Roelof Op 26-3-2019 om 20:14 schreef Carlo: > Hi Roelof > > The block [] should be (). What's happening is that the block is being added to outcome which will then print itself out. > > Cheers > Carlo > > On 26 Mar 2019, at 20:45, Roelof Wobben <r.wobben(a)home.nl> wrote: > > Hello > > Could be , im confused now > > I tried this : > > outcome > add: 'Team | MP | W | D | L | P'. > outcome > add: [ String > streamContents: [ :s | > TeamStatusSorted > do: [ :each | > s << each name. > s << String cr ] ] ]. > ^ outcome > > but get now a output of the header and then the code. > > Roelof > > > > Op 26-3-2019 om 19:38 schreef Carlo: >> Hi Roelof >> >> I think you meant >> String streamContents: >> and not >> Array streamContents: >> >> >> >> On 26 Mar 2019, at 20:12, Roelof Wobben <r.wobben(a)home.nl> wrote: >> >> Hello, >> >> I have a SortedCollection of teams. >> >> Now I need to convert this to a line like this : >> >> 'Allegoric Alaskans | 1 | 1 | 0 | 0 | 3' >> >> I tried it with this : >> >> outcome := Array >> streamContents: [ :s | >> TeamStatusSorted >> do: [ :each | >> s << each name. >> s << String cr ] ]. >> ^ outcome >> >> >> or String streamContents but it will not give me the right answer, >> So please some hints how I can make this work. >> >> Roelof >> >> >> >> >> > > > >

March 26, 2019

Re: [Pharo-users] how to convert this with a stream

by Carlo

Hi Roelof The block [] should be (). What's happening is that the block is being added to outcome which will then print itself out. Cheers Carlo On 26 Mar 2019, at 20:45, Roelof Wobben <r.wobben(a)home.nl> wrote: Hello Could be , im confused now I tried this : outcome add: 'Team | MP | W | D | L | P'. outcome add: [ String streamContents: [ :s | TeamStatusSorted do: [ :each | s << each name. s << String cr ] ] ]. ^ outcome but get now a output of the header and then the code. Roelof Op 26-3-2019 om 19:38 schreef Carlo: > Hi Roelof > > I think you meant > String streamContents: > and not > Array streamContents: > > > > On 26 Mar 2019, at 20:12, Roelof Wobben <r.wobben(a)home.nl> wrote: > > Hello, > > I have a SortedCollection of teams. > > Now I need to convert this to a line like this : > > 'Allegoric Alaskans | 1 | 1 | 0 | 0 | 3' > > I tried it with this : > > outcome := Array > streamContents: [ :s | > TeamStatusSorted > do: [ :each | > s << each name. > s << String cr ] ]. > ^ outcome > > > or String streamContents but it will not give me the right answer, > So please some hints how I can make this work. > > Roelof > > > > >

March 26, 2019

Re: [Pharo-users] how to convert this with a stream

by Roelof Wobben

Hello Could be , im confused now I tried this : outcome Â Â Â Â Â Â add: 'TeamÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â | MP |Â W |Â D |Â L |Â P'. Â Â Â outcome Â Â Â Â Â Â add: [ String Â Â Â Â Â Â Â Â Â Â Â Â streamContents: [ :s | Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â TeamStatusSorted Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â do: [ :each | Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â s << each name. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â s << String cr ] ] ]. Â Â Â ^ outcome butÂ get now a output of the header and then the code. Roelof Op 26-3-2019 om 19:38 schreef Carlo: > Hi Roelof > > I think you meant > String streamContents: > and not > Array streamContents: > > > > On 26 Mar 2019, at 20:12, Roelof Wobben <r.wobben(a)home.nl> wrote: > > Hello, > > I have a SortedCollection of teams. > > Now I need to convert this to a line like this : > > 'Allegoric Alaskans | 1 | 1 | 0 | 0 | 3' > > I tried it with this : > > outcome := Array > streamContents: [ :s | > TeamStatusSorted > do: [ :each | > s << each name. > s << String cr ] ]. > ^ outcome > > > or String streamContents but it will not give me the right answer, > So please some hints how I can make this work. > > Roelof > > > > >

March 26, 2019