April 2011 - Pharo-dev - lists.pharo.org

Re: [Pharo-project] [Pharo-users] 1.2.1 Windows no-no

by Mariano Martinez Peck

On Sat, Apr 9, 2011 at 7:07 PM, Robert Shiplett <grshiplett(a)gmail.com>wrote: > I just inspected the pharo LNK file of my new > > C:\Pharo-1.2.1-CogOneClick.app > > and it is set to start in > > > "C:\Documents and Settings\Administrator\Desktop\OneClick.app" > > > WRONG! > > I am logged in as another user and not as Administrator ( which on XP > I only enter from Safe Mode ) > > > Pharo might be okay using my > > C:\Documents and Settings\Owner\Local Settings\Application Data > > I have reset the LNK as starting in > > C:\Pharo-1.2.1-CogOneClick.app\Contents\Resources > > and reset the TARGET to > > C:\Pharo-1.2.1-CogOneClick.app\Contents\Windows\Squeak.exe pharo.image > > > Some Windows users would not be amused to see this Administrator ... > as all too often spyware goes where it does not belong ... especially > on Corp desktops. > Can you please submit an issue with that please? Check these threads: http://forum.world.st/template/NamlServlet.jtp?macro=search_page&node=12948… > > If we use an sh for Linux, why can't we use a simple BAT for Windows? > > Are you aware of the Windows installer ? -- Mariano http://marianopeck.wordpress.com

April 9, 2011

[Pharo-project] TestResource bug?

by Guillermo Polito

Hi! I'm using pharo 1.2 and I've found a little problem in here TestResource>>makeAvailable "This method must be the _only_ way to set a notNil value for the unique instance (current). First, obtain a candidate instance and set current to a notNil placeholder (any notNil object not an instance of me would do; this version uses false). Next, check any subordinate resources needed by this resource. Lastly, setUp the candidate and put it in current if it is available, ensuring that it is torn down otherwise." | candidate | * current := false.* candidate := self new. self resources do: [:each | each availableFor: candidate]. [candidate setUp. candidate isAvailable ifTrue: [current := candidate]] ensure: [current == candidate ifFalse: [candidate tearDown]] And everywhere in the class, the check over the current class instance var is done like current isNil ifTrue: .... So once that var is initialized, but the makeAvailable fails, it always fails... Is this a bug or i'm doing a mistake? Shouldn't *current := false be changed *be changed by *current := nil. *??* *Thanks! Guille

April 9, 2011

Re: [Pharo-project] Initial PetitC parser

by Javier PimÃ¡s

Good! Then we can do this in half the time with half the effort each (if it's not already done). Regards, Javier. 2011/4/9 StÃ©phane Ducasse <stephane.ducasse(a)inria.fr> > in that case you have also cil in oCaml used by Frama-C. > > But I do not think that this is necessary to read all the ressources of > earth. > > Javier contact nick because he started (I guess to implement a parser for C > using PP). > > Stef > On Apr 8, 2011, at 8:25 PM, Alexandre Bergel wrote: > > > A good source of ideas: http://www.sdml.info/projects/srcml/ > > > > Alexandre > > > > > > On 8 Apr 2011, at 12:57, Javier PimÃ¡s wrote: > > > >> > >> > >> On Fri, Apr 8, 2011 at 1:08 PM, Alexandre Bergel < > alexandre.bergel(a)me.com> wrote: > >> What is tricky with analyzing C are macros and preprocessors directive. > >> srcML does a satisfactory job. But indeed, having a solution based on > PetitParser is indeed promising. > >> > >> Yes, and I don't know what to do, and would like to know if you or > someone else have any idea of how to solve it. I will think some approach, > but if you have some idea to share it would be better so I go directly to a > good solution. I'm thinking that to feed the parser I'll have to preprocess > the string with another parser, and make a string to string conversion by > having a set of defines and paths so that #includes and #ifdefs work. But > probably I'll need a cache because the generated string will be huge. > >> > >> What do you think? > >> > >> Regards, > >> Javier. > >> > >> Cheers, > >> Alexandre > >> > >> > >> On 7 Apr 2011, at 23:53, Javier PimÃ¡s wrote: > >> > >>> by the way, the grammar is based on > >>> > >>> http://www.quut.com/c/ANSI-C-grammar-l-1998.html > >>> > >>> and > >>> > >>> http://www.quut.com/c/ANSI-C-grammar-y.html > >>> > >>> I'd be very grateful if you contribute to cover the full extent of it! > >>> > >>> > >>> On Fri, Apr 8, 2011 at 12:37 AM, Javier PimÃ¡s < > elpochodelagente(a)gmail.com> wrote: > >>> Hi, > >>> I took some time to start developing a C parser with PetitParser. I > used the slides of the smalltalk school, they were pretty useful, and after > some hours I have a very basic tokens scanner. The idea of this work is to > be able to feed the parser with C headers and automagically get the C > bindings done in smalltalk. > >>> > >>> Now I have to actually start doing something with the scanned code. How > should I do that, all in the same class? What if I want to generate bindings > for different kinds of FFIs? Other question, how should I handle > preprocessing? (now there isn't any kind of preprocessing) > >>> > >>> You can see the code, download it and commit improvements to the repo > at www.squeaksource.com/Bindings > >>> > >>> Anybody who is interested is welcomed to help in the development! > >>> > >>> Regards, > >>> Javier. > >>> > >>> -- > >>> Javier PimÃ¡s > >>> Ciudad de Buenos Aires > >>> > >>> > >>> > >>> -- > >>> Javier PimÃ¡s > >>> Ciudad de Buenos Aires > >> > >> -- > >> _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: > >> Alexandre Bergel http://www.bergel.eu > >> ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> -- > >> Javier PimÃ¡s > >> Ciudad de Buenos Aires > > > > -- > > _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: > > Alexandre Bergel http://www.bergel.eu > > ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > > > > > > > > > > > > > > -- Javier PimÃ¡s Ciudad de Buenos Aires

April 9, 2011

Re: [Pharo-project] thx to Code Snippets

by HwaJong Oh

As you said in the post PharoFAQ is old, and codes seems more outdated than CodeSnippets. Maybe ProfStef + Metacello is more reliable medium than web page. the collaborAction book looks very interesting. I better read it then trying rest of the PharoFAQs. Best Regards -- View this message in context: http://forum.world.st/thx-to-Code-Snippets-tp3438383p3438416.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

April 9, 2011

[Pharo-project] Providing a Cog debug [WAS] Fwd: [Vm-dev] Debugging Cog crash

by Mariano Martinez Peck

Hi...I was reading this thread, and even before his last answer, I was thinking more or less the same. Is it worth it to create one more target in Hudson so that to create cogs but with debug flags? It is not necessary to create for stack vm, cog and mt. Maybe just cog is enough. And one for each OS. So, it is only 3 targets, using: CogDebugMacOSConfig, CogDebugUnixConfig, and ... (sorry, I didn't find in windows..). What do you think? is it worth it ? or we can say "ehhh ehh compile it by your own " ? cheers Mariano ---------- Forwarded message ---------- From: Schwab,Wilhelm K <bschwab(a)anest.ufl.edu> Date: Sat, Apr 9, 2011 at 2:19 PM Subject: RE: [Pharo-project] [Vm-dev] Debugging Cog crash To: "Pharo-project(a)lists.gforge.inria.fr" < Pharo-project(a)lists.gforge.inria.fr>, Squeak Virtual Machine Development Discussion <vm-dev(a)lists.squeakfoundation.org> Is there a debug version of Cog that I can run on the box? I have casually avoided learning how to build Cog in part because that means I can't hack the FFI plugin, which forces me to play by the rules on library paths/ldconfig, etc. It also means that I don't have a build environment ready to go, so I can't readily add syslog() calls to bracket where it quits. gdb isn't helping as described below. If there is something you want me to try, let me know. We have a reproducible Cog crash. ________________________________________ From: pharo-project-bounces(a)lists.gforge.inria.fr [ pharo-project-bounces(a)lists.gforge.inria.fr] On Behalf Of Schwab,Wilhelm K [ bschwab(a)anest.ufl.edu] Sent: Friday, April 08, 2011 6:03 PM To: Pharo-project(a)lists.gforge.inria.fr; Squeak Virtual Machine Development Discussion Subject: Re: [Pharo-project] [Vm-dev] FW: Debugging Cog crash Levente, I follow on why my shell script did not work. Your instructions got me going, but we still don't have an answer. The vm is running, but I cannot attach: http://lists.squeakfoundation.org/pipermail/vm-dev/2008-March/001840.html >From what I read, one answer is the get the image loaded and then attach - my problem is that the vm never gets far enough to actually load the image. Any ideas? Bill -- Mariano http://marianopeck.wordpress.com

April 9, 2011

Re: [Pharo-project] Help (perfect for newcomers) migrating a technical FAQ

by Mariano Martinez Peck

One year after..... anyone interested ? On Thu, May 13, 2010 at 10:37 PM, Mariano Martinez Peck < marianopeck(a)gmail.com> wrote: > Hi folks. I had a good idea and and it perfect for someone that wants to > help and don't know how. It is not the most entertained task, but I promise > you will learn a lot. Mostly, if you are newcomer. > > The idea is basically to migrate the FAQ that is here: > > http://scg.unibe.ch/wiki/faq/pharofaq > > to a new section in the collaborative Pharo book: > > http://book.pharo-project.org/ > > So....any takers ? Let us know so that we generate a new user in the Book > > The idea is also to check whether what is says is still correct for pharo > or if it needs an update. Or even how to improve it (from the view of a > newcomer). > > Thanks > > Mariano > -- Mariano http://marianopeck.wordpress.com

April 9, 2011

Re: [Pharo-project] thx to Code Snippets

by Mariano Martinez Peck

Ineed, there is something much better. But no one take time to update it or moved to pharo book: http://forum.world.st/Help-perfect-for-newcomers-migrating-a-technical-FAQ-… Cheers Mariano On Sat, Apr 9, 2011 at 2:30 PM, Mariano Martinez Peck <marianopeck(a)gmail.com > wrote: > > > On Sat, Apr 9, 2011 at 2:27 PM, HwaJong Oh <daliot.oh(a)gmail.com> wrote: > >> To me, learning Smalltalk is not as easy as knowing how cool Smalltalk is. >> >> I found a page very useful most of people here already know: >> >> http://code.google.com/p/pharo/wiki/CodeSnippets >> >> >> Although some examples are out dated. it is still fun. It almost feels >> like >> a web version of ProfStef. >> >> Thank you everyone who contributed there. >> >> > hehehe you can contribute too :) > Just update those out dated > > cheers > > mariano > > >> Best Regards >> >> -- >> View this message in context: >> http://forum.world.st/thx-to-Code-Snippets-tp3438383p3438383.html >> Sent from the Pharo Smalltalk mailing list archive at Nabble.com. >> >> > > > -- > Mariano > http://marianopeck.wordpress.com > > -- Mariano http://marianopeck.wordpress.com

April 9, 2011

Re: [Pharo-project] thx to Code Snippets

by Mariano Martinez Peck

On Sat, Apr 9, 2011 at 2:27 PM, HwaJong Oh <daliot.oh(a)gmail.com> wrote: > To me, learning Smalltalk is not as easy as knowing how cool Smalltalk is. > > I found a page very useful most of people here already know: > > http://code.google.com/p/pharo/wiki/CodeSnippets > > > Although some examples are out dated. it is still fun. It almost feels like > a web version of ProfStef. > > Thank you everyone who contributed there. > > hehehe you can contribute too :) Just update those out dated cheers mariano > Best Regards > > -- > View this message in context: > http://forum.world.st/thx-to-Code-Snippets-tp3438383p3438383.html > Sent from the Pharo Smalltalk mailing list archive at Nabble.com. > > -- Mariano http://marianopeck.wordpress.com

April 9, 2011

[Pharo-project] thx to Code Snippets

by HwaJong Oh

To me, learning Smalltalk is not as easy as knowing how cool Smalltalk is. I found a page very useful most of people here already know: http://code.google.com/p/pharo/wiki/CodeSnippets Although some examples are out dated. it is still fun. It almost feels like a web version of ProfStef. Thank you everyone who contributed there. Best Regards -- View this message in context: http://forum.world.st/thx-to-Code-Snippets-tp3438383p3438383.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

April 9, 2011

Re: [Pharo-project] relational database and id field

by Alexandre Bergel

Ok Alexandre On 8 Apr 2011, at 14:50, Guillermo Polito wrote: > And one more remark about ids. I prefer not to use domain related ids like ISBN, because some day those rules will change and become obsolet, and your whole schema will need to be changed :/. > > Using autogenerated ids are more confortable if you take that into account. > > On Fri, Apr 8, 2011 at 3:43 PM, Richard Durr <richard.durr(a)googlemail.com> wrote: > I recommend ids because without them, objects that are equal but not identicall do not really fit into the db. ^^ > > > > On Thu, Apr 7, 2011 at 3:43 PM, Schwab,Wilhelm K <bschwab(a)anest.ufl.edu> wrote: > That sounds like a one-to-many relationship. In those cases, I create two tables, one for the singleton side and one for the many side. The many side includes the key field(s) from the one side, and setting it/them establishes the relationship. A unique ID field for the singleton side is helpful, especially if things get edited. For many to many, I create a third table that does nothing but associate keys between the two tables - I'm not even sure if there is another way to do it?? > > > > ________________________________________ > From: pharo-project-bounces(a)lists.gforge.inria.fr [pharo-project-bounces(a)lists.gforge.inria.fr] On Behalf Of Benoit St-Jean [bstjean(a)yahoo.com] > Sent: Thursday, April 07, 2011 8:57 AM > To: Alexandre Bergel > Cc: Pharo-project(a)lists.gforge.inria.fr > Subject: Re: [Pharo-project] relational database and id field > > One more remark, > > Since you're storing objects into a RDBMS, I guess what you're trying to express into "the relational world" is a notion of pointer (such as an object contains a collection of something in one of its instance variable, or a child has a mother kinda relationship, link). In that case, to save you headaches and lots of "weird object-oriented modeling", an oid (object id) is what is used normally. Any sequence (the shorter the better, don't use GUID for instance!) would do... > > ----------------- > Benoit St-Jean > Yahoo! Messenger: bstjean > A standpoint is an intellectual horizon of radius zero. > (Albert Einstein) > > > ________________________________ > From: Alexandre Bergel <alexandre.bergel(a)me.com> > To: Benoit St-Jean <bstjean(a)yahoo.com> > Cc: Pharo-project(a)lists.gforge.inria.fr > Sent: Thu, April 7, 2011 9:49:11 AM > Subject: Re: [Pharo-project] relational database and id field > > > Normally, you should always have a primary key to uniquely identify a record in a database table. If you have an attribute (or a set of attributes) that can uniquely identify your ComicBook, you don't need an id field. BUT, if you tell me you're going to store lots and lots and lots of those ComicBook instances, having an id (integer) as the primary key has potential non-negligeable advantages over, say, something like a name. Mainly because an id (let's suppose it's an INT) takes way less storage than say a name (VARCHAR(30) for instance) and thus more index records can fit into the key buffer in memory. > > Ok, I understand. > > > 1) yes, always provide a primary key > > 2) if you have already A primary key (even a composite one) > > 2a) if you need performance and are gonna store LOTS of those objects, the smaller the key the better so you could create a surrogate key (the id key) instead of using the "real" primary key > > 2b) if performance is not an issue, you can use what is already available that uniquely identifies your object (row) in the database table > > Thanks! > > > P.S. Are you using a particular OO-RDBMS framework? > > No, I am correcting a student thesis :-) > I would probably not use SQL if I had to :-) > > Cheers, > Alexandre > > > > > > ----------------- > > Benoit St-Jean > > Yahoo! Messenger: bstjean > > A standpoint is an intellectual horizon of radius zero. > > (Albert Einstein) > > > > > > From: Alexandre Bergel <alexandre.bergel(a)me.com<mailto:alexandre.bergel@me.com>> > > To: Pharo Development <Pharo-project(a)lists.gforge.inria.fr<mailto:Pharo-project@lists.gforge.inria.fr>> > > Sent: Thu, April 7, 2011 9:19:03 AM > > Subject: [Pharo-project] relational database and id field > > > > Hi! > > > > Since there are some experts in databases here, I ask a general question about it. > > Assume that I have to use a relational database to store, let's stay instances of Stef's ComicBook class. > > Should the class ComicBook have a field id to uniquely identify a book? > > > > Cheers, > > Alexandre > > -- > > _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: > > Alexandre Bergel http://www.bergel.eu > > ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > > > > > > > > > > > > > > -- > _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: > Alexandre Bergel http://www.bergel.eu > ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > > > > > > > > -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

April 9, 2011