September 2016 - Pharo-users

Re: [Pharo-users] double dispatch example

by Peter H. Meadows

On 13 September 2016 at 11:33, stepharo <stepharo(a)free.fr> wrote: > Hi > > If you happen to know a double dispatch situation in Pharo, I'm interested > since I'm revisiting my lecture. > There is a good example in http://www.lulu.com/shop/andres-valloud/fundamentals-of-smalltalk-programmi… He uses it in an implementation of Game Of Life. > > Stef > >

Sept. 29, 2016

Re: [Pharo-users] Speeding-up >>#instVarNamed: in Pharo-5.0 and beyond?

by Bernardo Ezequiel Contreras

cheap hack. if you replace this line index := self classLayout instVarIndexFor: instVarName ifAbsent: [0]. with index := self classLayout instVarIndexFor: instVarName ifAbsent: 0. in instVarIndexFor: instVarName ifAbsent: aBlock it will be faster because it won't create a closure, but no one will approve that use. to cheap :) On Wed, Sep 28, 2016 at 6:41 PM, Holger Freyther <holger(a)freyther.de> wrote: > Hi, > > Magritte and my TagLengthValue (TLV) both use >>#instVarNamed:/>>#instVarNamed:put: > to read and write from an object. I was just running >>#bench on my SMPP > library and noticed that besides Spur Pharo5 is slower than Pharo3. > > > I added this to PointerLayout: > > >># instVarIndexFor: aString ifAbsent: aBlockClosure > | idx | > idx := 1. > slotScope do: [:each | > each isVisible ifTrue: [ > each name = aString ifTrue: [^idx]. > idx := idx +1]]. > ^aBlockClosure value > > and modified ClassDescription/TClassDescription to use it: > > "protocol: instance variables" > instVarIndexFor: instVarName ifAbsent: aBlock > "Answer the index of the named instance variable." > > | index | > index := self classLayout instVarIndexFor: instVarName ifAbsent: > [0]. > index = 0 ifTrue: > [^self superclass == nil > ifTrue: [aBlock value] > ifFalse: [self superclass instVarIndexFor: > instVarName ifAbsent: aBlock]]. > ^self superclass == nil > ifTrue: [index] > ifFalse: [index + self superclass instSize] > > > The speed-up comes from filtering allSlots to allVisibleSlots (and > creating an Array), then collecting the slot names and finally searching > the name. Does it make sense to integrate such speed-ups? > > > cheers > holger > > > -- Bernardo E.C. Sent from a cheap desktop computer in South America.

Sept. 29, 2016

PhyloclassTalk Demo Video

by HernÃ¡n Morales Durand

I want to share with you a video I did just yesterday (no audio yet) of the PhyloclassTalk application: https://youtu.be/1iPbDHbjbLU As some of you may know, I work in a research institute, so the workflow is very specific to phylogeography and bioinformatics. But I hope you may find it useful as a showcase for Pharo, or to grab some ideas. It took some years to get here. It also uses code many of you wrote, so you can say Hi! if you recognize your source there :) Here is the web site for documentation and details: http://phyloclasstalk.github.io/ I would love to read your recommendations, or comments. Cheers, HernÃ¡n

Sept. 29, 2016

Re: [Pharo-users] Subscript Out Of Bounds: 1 when commiting from Versionner

by HernÃ¡n Morales Durand

If I understood right I think only 18927 should be back ported. Hope it gets integrated soon, seems to me a showstopper for Metacello + Versionner. HernÃ¡n 2016-09-28 12:47 GMT-03:00 stepharo <stepharo(a)free.fr>: > so do you think that we should back port these two big fixes? at least > 18927 I think > > Le 28/9/16 Ã 13:48, HernÃ¡n Morales Durand a Ã©crit : > > May be this issue : https://pharo.fogbugz.com/f/ > cases/18684/Versionner-Error-while-commiting-a- > configuration-for-the-first-time > > And here for the fix : https://pharo.fogbugz.com/f/ > cases/18927/Komitter-throws-up-if-it-has-committed-everything > > HernÃ¡n > > > 2016-09-28 1:29 GMT-03:00 stepharo <stepharo(a)free.fr>: > >> Yes it was fix in pharo 60 and we should port it back but I forgot the >> issue number >> >> >> >> Le 27/9/16 Ã 21:00, HernÃ¡n Morales Durand a Ã©crit : >> >> When commiting with Versionner in Pharo 5.0 I always have to manually >>> override this method >>> >>> KomitStagingArea>>remotes >>> | result | >>> >>> result := self packages first remotes. >>> self packages allButFirst do: [ :each | >>> result := result intersection: each remotes ]. >>> >>> ^ result collect: [ :each | each koRemote ] >>> >>> to >>> >>> KomitStagingArea>>remotes >>> >>> self packages isEmpty >>> ifFalse: [ >>> | result | >>> result := self packages first remotes. >>> self packages allButFirst do: [ :each | >>> result := result intersection: each remotes ]. >>> ^ result collect: [ :each | each koRemote ] ]. >>> ^ Array empty. >>> >>> Screenshot attached. >>> Is this known issue or was this reported before? >>> >>> Hernan >>> >>> >> >> > >

Sept. 29, 2016

Re: [Pharo-users] Speeding-up >>#instVarNamed: in Pharo-5.0 and beyond?

by stepharo

> Hi, > > Magritte and my TagLengthValue (TLV) both use >>#instVarNamed:/>>#instVarNamed:put: to read and write from an object. I was just running >>#bench on my SMPP library and noticed that besides Spur Pharo5 is slower than Pharo3. > > > I added this to PointerLayout: > >>> # instVarIndexFor: aString ifAbsent: aBlockClosure > | idx | > idx := 1. > slotScope do: [:each | > each isVisible ifTrue: [ > each name = aString ifTrue: [^idx]. > idx := idx +1]]. > ^aBlockClosure value > > and modified ClassDescription/TClassDescription to use it: > > "protocol: instance variables" > instVarIndexFor: instVarName ifAbsent: aBlock > "Answer the index of the named instance variable." > > | index | > index := self classLayout instVarIndexFor: instVarName ifAbsent: [0]. > index = 0 ifTrue: > [^self superclass == nil > ifTrue: [aBlock value] > ifFalse: [self superclass instVarIndexFor: instVarName ifAbsent: aBlock]]. > ^self superclass == nil > ifTrue: [index] > ifFalse: [index + self superclass instSize] > > > The speed-up comes from filtering allSlots to allVisibleSlots (and creating an Array), then collecting the slot names and finally searching the name. Does it make sense to integrate such speed-ups? Yes!!!!!!!!!!!!!!!!!!!!!! if you can just improve a bit the method comments it would be really great! > > > cheers > holger > > >

Sept. 29, 2016

turning a collection (interval for example) into a stream

by stepharo

Hi I was looking at how we can turn a collection into a stream. I played with g := Generator on: [ :gen | | current | current := 0. [ gen yield: (current := current + 1) ] repeat ]. g next. and now imagine that we have (1 to: 1000) collect: [:each | {each -1 . each . each + 1}]. I was wondering how we could turn it into a stream (1 to: 1000) asStream collect: [:each | {each -1 . each . each + 1}]. and what would be the asStream method. for index based I can see that next next is something like next ^ self at: (current := current + 1) and collect: could be rewritten to use a generator. Now does anybody play with this already? Does xtream provide a way to do something in the same vein? We can have a stream of blocks. Stef

Sept. 29, 2016

trying to run Pier3 in Pharo6 with latest Pillar

by Peter H. Meadows

Am I right that PRDocumentDescription>>parserClass should be PRPillarParserMain instead of PRDocumentParser ?

Sept. 28, 2016

Re: [Pharo-users] Amazon drive API's for Pharo ?

by Paul DeBruicker

There is this https://github.com/newapplesho/aws-sdk-smalltalk I've been (slowly) working on adding the streaming-encrypted-upload-to-S3 code which I could publish soonish (this weekend?) in a fork if you want to take a look at it. CÃ©drick BÃ©ler wrote > Hi all, > > Iâve just seen that the unlimited offer that Amazon proposes for its drive > is now available in France. !! > Itâs 70â¬/year so quite cheapâ¦ > > Do people know if there are pharo packages to uses its RESTful API ? > https://developer.amazon.com/public/apis/experience/cloud-drive/content/res… > > TIA (Iâll investigate deeper shortly), > > CÃ©drik -- View this message in context: http://forum.world.st/Amazon-drive-API-s-for-Pharo-tp4917106p4917317.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Sept. 28, 2016

Speeding-up >>#instVarNamed: in Pharo-5.0 and beyond?

by Holger Freyther

Hi, Magritte and my TagLengthValue (TLV) both use >>#instVarNamed:/>>#instVarNamed:put: to read and write from an object. I was just running >>#bench on my SMPP library and noticed that besides Spur Pharo5 is slower than Pharo3. I added this to PointerLayout: >># instVarIndexFor: aString ifAbsent: aBlockClosure | idx | idx := 1. slotScope do: [:each | each isVisible ifTrue: [ each name = aString ifTrue: [^idx]. idx := idx +1]]. ^aBlockClosure value and modified ClassDescription/TClassDescription to use it: "protocol: instance variables" instVarIndexFor: instVarName ifAbsent: aBlock "Answer the index of the named instance variable." | index | index := self classLayout instVarIndexFor: instVarName ifAbsent: [0]. index = 0 ifTrue: [^self superclass == nil ifTrue: [aBlock value] ifFalse: [self superclass instVarIndexFor: instVarName ifAbsent: aBlock]]. ^self superclass == nil ifTrue: [index] ifFalse: [index + self superclass instSize] The speed-up comes from filtering allSlots to allVisibleSlots (and creating an Array), then collecting the slot names and finally searching the name. Does it make sense to integrate such speed-ups? cheers holger

Sept. 28, 2016

SPLASH'16 Amsterdam CFP: early registration ends Sept 30

by Tijs van der Storm

################################################# ACM Conference on Systems, Programming, Languages, and Applications: Software for Humanity (SPLASH'16) ################################################# Amsterdam, The Netherlands Sun 30th October - Fri 4th November , 2016 http://2016.splashcon.org https://twitter.com/splashcon https://www.facebook.com/SPLASHCon/ ** REGISTRATION ** 30 September 2016 (Early Deadline) Contact: info(a)splashcon.org http://2016.splashcon.org/attending/registration # What's happening at SPLASH? ## Keynotes - Benjamin Pierce (SPLASH) The Science of Deep Specification - Andy Ko (SPLASH) A Human View of Programming Languages - Martin Odersky (SPLASH) - Guy Steele Jr. (SPLASH-I) - Robby Findler (SLE) Redex: Lightweight Semantics Engineering - Tiark Rompf (GPCE) Lightweight Modular Staging: Generate all the things! - Simon Peyton Jones (SPLASH-I/E) The dream of a lifetime: shaping how our children learn computing - Laurence Tratt (Scala) Fine-grained language composition without a common VM - Jan Vitek (Scala) This is not a Type: Gradual typing in practice ## Workshop Keynotes - Andrew Black (NOOL) The Essence of Inheritance - Alan Blackwell (PLATEAU) How to Design a Programming Language - Felienne Hermans (DSLDI) Small, simple and smelly: What we can learn from examining end-user artifacts? - Ivano Malavolta (Mobile!) Beyond native apps: Web technologies to the rescue! - Betsy Pepels (ITSLE) Model Driven Software Engineering (MDSE) in the large - Markus Voelter (ITSLE) Lessons Learned about Language Engineering from the Development of mbeddr - Beverly Sanders (SEPS) Patterns for Parallel Programming: New and Improved! ** Conference Program ** http://2016.splashcon.org/program/program-splash-2016 ** SPLASH-I Track ** SPLASH-I is a series of invited and solicited talks that address topics relevant to the SPLASH community. Speakers are world-class experts in their field, selected and invited by the organizers. The SPLASH-I talks series is held in parallel with the rest of SPLASH during the week days. Talks are open to all attendees. A selection of confirmed talks: - Edwin Brady Type-driven Development in Idris - JÃ¼rgen Cito Using Docker Containers to Improve Reproducibility in PL/SE Research - Yvonne Coady Exploratory Analysis in Virtual Reality: The New Frontier - Adam Chlipala Rapid Development of Web Applications with Typed Metaprogramming in Ur/Web - Tudo Girba Software Environmentalism - Robert Grimm Adventures in Software Evolution - Brian Harvey Snap! Scheme Disguised as Scratch - Lennart Kats Responsive Language Tooling For Cloud-based IDEs - Ralf Laemmel The basic skill set of software language engineering - Crista Lopes Simulating Cities: The Spacetime Framework - Heather Miller Language Support for Distributed Systems - Mark Miller & Bill Tulloh The elements of decision alignment: Large programs as complex organizations - Boaz Rosenan & David Lorenz Define Your App, Donât Implement It: Building a Scalable Social Network in 45 minutes - Emmanuel Schanzer Bootstrap - Chris Seaton Truffle and Graal: Fast Programming Languages With Modest Effort - Emma SÃ¶derbergh From Tricorder to Tricium: Useful Static Analysis and the Importance of Workflow Integration - Emma Tosch Designing and Debugging Surveys with SurveyMan - Todd Veldhuizen Fast Datalog - Markus VÃ¶lter How Domain Requirements Shape Languages - Jos Warmer Making Mendix Meta Model Driven - Andy Zaidman Fact or fiction? What software analytics can do for us (developers and researchers) More information here: http://2016.splashcon.org/track/splash-2016-splash-i#program ** Research tracks - OOPSLA http://2016.splashcon.org/track/splash-2016-oopsla#event-overview - Onward! http://2016.onward-conference.org/track/onward-2016-papers#event-overview - Onward! Essays http://2016.onward-conference.org/track/onward2016-essays#program - Software Language Engineering (SLE) http://conf.researchr.org/track/sle-2016/sle-2016-papers#event-overview - Generative Programming: Concepts & Experiences (GPCE) http://conf.researchr.org/track/gpce-2016/gpce-2016-papers#event-overview - Dynamic Languages Symposium (DLS) http://conf.researchr.org/track/dls-2016/dls-2016-papers#event-overview - Scala Symposium http://conf.researchr.org/track/scala-2016/scala-2016#event-overview ** Other Events - Doctoral Symposium http://2016.splashcon.org/track/splash-2016-ds#event-overview - Programming Language Mentoring Workshop (PLMW) http://2016.splashcon.org/track/splash-2016-plmw - Student Research Competition (SRC) http://2016.splashcon.org/track/splash-2016-src - Posters http://2016.splashcon.org/track/splash-2016-posters#event-overview ** Workshops SPLASH'16 is hosting a record number of 15 workshops: - AGERE! Programming based on Actors, Agents, and Decentralized Control http://2016.splashcon.org/track/agere2016 - DSLDI: Domain-Specific Language Design and Implementation http://2016.splashcon.org/track/dsldi2016 - DSM: Domain-Specific Modeling http://2016.splashcon.org/track/dsm2016 - FOSD: Feature-oriented Software Development http://www.fosd.net/workshop2016 - ITSLE: Industry Track Software Language Engineering http://2016.splashcon.org/track/itsle2016 - LWC@SLE: Language Workbench Challenge http://2016.splashcon.org/track/lwc2016 - META http://2016.splashcon.org/track/meta2016 - Mobile! http://2016.splashcon.org/track/mobile2016 - NOOL: New Object-Oriented Languages http://2016.splashcon.org/track/nool2016 - PLATEAU: Evaluation and Usability of Programming Languages and Tools http://2016.splashcon.org/track/plateau2016 - Parsing@SLE http://2016.splashcon.org/track/parsing2016 - REBLS: Reactive and Event-based Languages & Systems http://2016.splashcon.org/track/rebls2016 - SA-MDE: Tutorial on MDD with Model Catalogue and Semantic Booster http://2016.splashcon.org/track/samde2016 - SEPS: Software Engineering for Parallel Systems http://2016.splashcon.org/track/seps2016 - VMIL: Virtual Machines and Intermediate Languages http://2016.splashcon.org/track/vmil2016 - WODA: Workshop on Dynamic Analysis http://2016.splashcon.org/track/woda2016 ## SPLASH'16 is kindly supported by the following organizations: - ACM: http://www.acm.org/ - SIGPLAN: http://www.sigplan.org/ - LogicBlox (Gold): http://www.logicblox.com/ - Universal Robots (PLMW, Gold): http://www.universal-robots.com/ - Oracle (Silver): http://www.oracle.com/index.html - TU Delft (Silver): http://tudelft.nl/ - Huawei (Bronze): http://www.huawei.com/en/ - Facebook (Bronze): https://research.facebook.com/ - IBM Research (Bronze): http://www.research.ibm.com/ - Google (Bronze): https://www.google.com - Itemis (Bronze): https://www.itemis.com/en/ - ING (Bronze): https://www.ing.nl Interested in supporting SPLASH'16? See our options here: http://2016.splashcon.org/attending/support-program.

Sept. 28, 2016