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[Pharo-project] Message cascades: can they be always transformed into a sequence?

by Stefan Marr

Hi: I got a little problem with message cascades, and since I already missed a few details the first time, I wonder whether I am overlooking something now again. My question is, whether it is always possible to flatten a cascade into a surrounding sequence of statements (method/block). I am introducing temporary variables for that, and am wonder whether there could be anything I am overlooking with respect to the evaluation order. Thus, are there constructs where I would change evaluation order by pulling out normal sends and put the results into temporary variables? I obviously need to make sure that if I flatten them, that I order receivers and arguments correctly. Is there anything else that could hinder flattening? (Ah, and I am happy to ignore reflection, thisContext, or exceptions.) Here two examples: ---> original: testCascadedSends | assoc | assoc := Association key: #foo value: 0. assoc value: (1 + 2); value: assoc value + 2; value: assoc value + 5. self assert: 10 equals: assoc value. testCascadedNotInSequence | assoc | assoc := Association key: #foo value: 0. assoc value: (assoc value: 1; value: 2; yourself). self assert: assoc equals: assoc value. <--- ---> transformed: testCascadedSends | assoc t* | assoc := Association key: #foo value: 0. assoc value: (1 + 2). t1 := assoc value. assoc value: t1 + 2. t2 := assoc value. assoc value: t2 + 5. self assert: 10 equals: assoc value. testCascadedNotInSequence | assoc t* | assoc := Association key: #foo value: 0. assoc value: 1. assoc value: 2. t1 := yourself. assoc value: t1. self assert: assoc equals: assoc value. <--- Thanks Stefan -- Stefan Marr Software Languages Lab Vrije Universiteit Brussel Pleinlaan 2 / B-1050 Brussels / Belgium http://soft.vub.ac.be/~smarr Phone: +32 2 629 2974 Fax: +32 2 629 3525

Dec. 13, 2011

Re: [Pharo-project] Cleaning up SmartRefStream use

by Schwab,Wilhelm K

Henry, Of course the old data do no know how to turn themselves into the current format. But they do/should carry with them version information (can be as simple as an integer bumped with each change); the system uses that to tell which incremental reshapes to apply. It works like a charm. Putting the conversion methods in the deserializer is _possible_, but it becomes a huge mess over time, risks collisions, complicates packaging for everything that uses it, and the code is FAR better placed in the classes that are changing over time. The latter becomes really obvious when one starts to use proxies. Bill ________________________________ From: pharo-project-bounces(a)lists.gforge.inria.fr [pharo-project-bounces(a)lists.gforge.inria.fr] on behalf of Henrik Sperre Johansen [henrik.s.johansen(a)veloxit.no] Sent: Tuesday, December 13, 2011 5:55 AM To: Pharo-project(a)lists.gforge.inria.fr Subject: Re: [Pharo-project] Cleaning up SmartRefStream use On 11.12.2011 19:50, Schwab,Wilhelm K wrote: When I last looked at SmartReferenceStream, it did two things that were bad: (2) reshape code was placed in SRS itself, not in the class that is changing shape. The thing that is being deserialized (which is when problems become apparent) should be in charge of the change. It simplifies both packaging (fewer loose methods to consider, and reduced opportunity for name collisions) and it also helps with using proxies for special circumstances. I'm not sure I understand/agree with what you are saying. What has been serialized is (almost) always an older version than what you are loading into, in which case I can't really see how it can answer the question "How do I turn into the current version?" correctly. Maybe there needs to be a split? Serialized version knows how to install itself as older versions (incase that's what you load into), while the image takes care if version in memory is newer than serialized? TBH, I also feel it's better to put the "import old versions" functionality as methods on the class itself rather than have an omnipotent materializer with special methods for installing all versions of all known classes in the system, I mean, exactly in the serializer/materializer do you intend to put such logic for custom user classes? Cheers, Henry

Dec. 13, 2011

Re: [Pharo-project] Startup Preferences

by Esteban Lorenzano

I wouldn't look in much places, that ambiguity is bad in the mid term... I would look just on ~/.pharo (the "config" name is bad: too generic) Cheers, Esteban El 13/12/2011, a las 11:21a.m., Sven Van Caekenberghe escribiÃ³: > > On 13 Dec 2011, at 11:37, Benjamin wrote: > >> Now there is a hierarchy for the setting file >> >> - first it lloks in the image diretory for st files >> - if none is found, it looks into >> ~/.config/pharo/${VERSION} >> - if none is found it looks into >> ~/.config/pharo/general >> >> We could also add a look into >> ~/.pharo/ > > Will looking in a lot of places not slow down the startup ? >

Dec. 13, 2011

Re: [Pharo-project] Startup Preferences

by Sven Van Caekenberghe

On 13 Dec 2011, at 11:37, Benjamin wrote: > Now there is a hierarchy for the setting file > > - first it lloks in the image diretory for st files > - if none is found, it looks into > ~/.config/pharo/${VERSION} > - if none is found it looks into > ~/.config/pharo/general > > We could also add a look into > ~/.pharo/ Will looking in a lot of places not slow down the startup ?

Dec. 13, 2011

Re: [Pharo-project] Startup Preferences

by Sean P. DeNigris

Benjamin Van Ryseghem-2 wrote > > - first it lloks in the image diretory for st files > Any .st file (not good) or just startup.st? -- View this message in context: http://forum.world.st/Startup-Preferences-tp4129591p4190520.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

Dec. 13, 2011

[Pharo-project] ZnUrl vs furl

by Sven Van Caekenberghe

I came across this: https://github.com/gruns/furl a small Python library that makes parsing and manipulating URLs simple. And this would be some equivalent manipulations using ZnUrl: | url | url := 'http://www.google.com/?one=1&two=2' asZnUrl. url queryAt: 'three' put: '3'. url queryRemoveKey: 'one'. url => http://www.google.com/?two=2&three=3 | url | url := 'http://www.google.com' asZnUrl. url addPathSegment: 'some encoding here'. url queryAt: 'and some encoding' put: 'here, too'. url => http://www.google.com/some%20encoding%20here?and%20some%20encoding=here%2C%… So I guess our base Url object does not need an extra library to make manipulations easier. Sven

Dec. 13, 2011

Re: [Pharo-project] Script to migrate from squeaksource to squeaksource3

by Mariano Martinez Peck

On Tue, Dec 13, 2011 at 2:16 PM, Benjamin < benjamin.vanryseghem.pharo(a)gmail.com> wrote: > I love you :D > > Now I just have to know if I can script the project creation and I will > have all the pieces ;) > > OMG. You are so fuc.. lazy. It takes 1 minute as maximum to do it from the website hahaha > > Thanks again, > > Ben > > On Dec 13, 2011, at 2:12 PM, Mariano Martinez Peck wrote: > > > http://marianopeck.wordpress.com/2011/11/08/migrating-projects-to-squeaksou… > > On Tue, Dec 13, 2011 at 2:11 PM, Benjamin < > benjamin.vanryseghem.pharo(a)gmail.com> wrote: > >> Hello guys, >> >> I would like to know if there is a way to script the creation of project >> on ss3 and the migration from ss to ss3. >> >> Cause it's well known that I am a lazy ass, and I do not want to have to >> recreate each project one by one by hand :) >> >> And I am pretty sure not to be the one trying to run away from >> squeaksource ;) >> >> >> >> >> Ben >> > > > > -- > Mariano > http://marianopeck.wordpress.com > > > -- Mariano http://marianopeck.wordpress.com

Dec. 13, 2011

Re: [Pharo-project] Script to migrate from squeaksource to squeaksource3

by Benjamin

I love you :D Now I just have to know if I can script the project creation and I will have all the pieces ;) Thanks again, Ben On Dec 13, 2011, at 2:12 PM, Mariano Martinez Peck wrote: > http://marianopeck.wordpress.com/2011/11/08/migrating-projects-to-squeaksou… > > On Tue, Dec 13, 2011 at 2:11 PM, Benjamin <benjamin.vanryseghem.pharo(a)gmail.com> wrote: > Hello guys, > > I would like to know if there is a way to script the creation of project on ss3 and the migration from ss to ss3. > > Cause it's well known that I am a lazy ass, and I do not want to have to recreate each project one by one by hand :) > > And I am pretty sure not to be the one trying to run away from squeaksource ;) > > > > > Ben > > > > -- > Mariano > http://marianopeck.wordpress.com >

Dec. 13, 2011

Re: [Pharo-project] Script to migrate from squeaksource to squeaksource3

by Mariano Martinez Peck

http://marianopeck.wordpress.com/2011/11/08/migrating-projects-to-squeaksou… On Tue, Dec 13, 2011 at 2:11 PM, Benjamin < benjamin.vanryseghem.pharo(a)gmail.com> wrote: > Hello guys, > > I would like to know if there is a way to script the creation of project > on ss3 and the migration from ss to ss3. > > Cause it's well known that I am a lazy ass, and I do not want to have to > recreate each project one by one by hand :) > > And I am pretty sure not to be the one trying to run away from > squeaksource ;) > > > > > Ben > -- Mariano http://marianopeck.wordpress.com

Dec. 13, 2011

[Pharo-project] Script to migrate from squeaksource to squeaksource3

by Benjamin

Hello guys, I would like to know if there is a way to script the creation of project on ss3 and the migration from ss to ss3. Cause it's well known that I am a lazy ass, and I do not want to have to recreate each project one by one by hand :) And I am pretty sure not to be the one trying to run away from squeaksource ;) Ben

Dec. 13, 2011