November 2012 - Pharo-users

Re: [Pharo-users] VAST-style Compile-time constants

by Mariano Martinez Peck

On Tue, Nov 27, 2012 at 12:54 AM, Bob Hartwig <bobjectssmalltalk(a)gmail.com>wrote: > Hi all, > > I'm investigating the feasibility of porting a large VAST application to > Pharo, so I may have some questions in the coming days. Here's my first > question: > > VAST has the concept of compile-time constants, using the ##() syntax. > Whatever is in the parentheses is evaluated at compile time, and the > result is stored, so the evaluation does not need to happen again when the > method is sent later. E.g., when this method is sent: > > printTheNumberToTheTranscript > > Transcript nextPutAll: ##( 10 factorial asString ) . > > no calculation or string conversion is necessary, because 10 factorial > asString was evaluated at compile time and the answer was stored. Please > note that this is different from array literals, which is how Pharo seems > to treat this syntax. > > As far as I can tell, Pharo does not have this feature (certainly not with > that syntax), but I would love to be proved wrong. Am I? > Yes, it has it also. The array is stored as a literal in the compiled method.....I think the sintax was with only one #, like: #(10 factorial asString) can you try? > Does anyone else have words of wisdom regarding porting a VAST app to > Pharo? Any other language features that are missing? I'm not too concerned > about Pragmas, and this app has no GUI, so I'm not concerned about UI > framework differences. > > Thanks, > Bob Hartwig > > -- Mariano http://marianopeck.wordpress.com

Nov. 27, 2012

VAST-style Compile-time constants

by Bob Hartwig

Hi all, I'm investigating the feasibility of porting a large VAST application to Pharo, so I may have some questions in the coming days. Here's my first question: VAST has the concept of compile-time constants, using the ##() syntax. Whatever is in the parentheses is evaluated at compile time, and the result is stored, so the evaluation does not need to happen again when the method is sent later. E.g., when this method is sent: printTheNumberToTheTranscript Transcript nextPutAll: ##( 10 factorial asString ) . no calculation or string conversion is necessary, because 10 factorial asString was evaluated at compile time and the answer was stored. Please note that this is different from array literals, which is how Pharo seems to treat this syntax. As far as I can tell, Pharo does not have this feature (certainly not with that syntax), but I would love to be proved wrong. Am I? Does anyone else have words of wisdom regarding porting a VAST app to Pharo? Any other language features that are missing? I'm not too concerned about Pragmas, and this app has no GUI, so I'm not concerned about UI framework differences. Thanks, Bob Hartwig

Nov. 26, 2012

Re: [Pharo-users] CollectionExtensions missing in Pharo 2.0

by Esteban Lorenzano

and you need to be fast, because as soon as we declare beta (next week), nothing else will be added :) On Nov 23, 2012, at 7:03 PM, StÃ©phane Ducasse <stephane.ducasse(a)inria.fr> wrote: > usman > > we would love to get some of the nice collection extensions made in Moose. > Now somebody has to push it to us. > open a ticket and submit code and you will get it. > Stef > > On Nov 22, 2012, at 4:37 PM, Usman Bhatti wrote: > >> Hello all, >> >> I remarked that the package CollectionExtensions is missing in Pharo 2.0. We are using a useful method provided by the package on strings that provides character intervals for line numbers in a string. Here is the code from 1.4: >> >> intervalOfLine: aLineNumber >> >> "Answer an interval spanning between the first and the last character of the line from aLineNumber" >> >> | lineIndex | >> lineIndex := 0. >> self lineIndicesDo: [ :start :endWithoutDelimiters :end | >> lineIndex := lineIndex + 1. >> lineIndex = aLineNumber ifTrue: [ ^ start to: end ] ]. >> ^ 0 to: 0 >> >> Now, this method is missing in Pharo 2.0. Is there a particular reason for omitting the package? Is there a replacement for the pckage? >> >> tx, >> Usman > >

Nov. 23, 2012

Re: [Pharo-users] CollectionExtensions missing in Pharo 2.0

by StÃ©phane Ducasse

usman we would love to get some of the nice collection extensions made in Moose. Now somebody has to push it to us. open a ticket and submit code and you will get it. Stef On Nov 22, 2012, at 4:37 PM, Usman Bhatti wrote: > Hello all, > > I remarked that the package CollectionExtensions is missing in Pharo 2.0. We are using a useful method provided by the package on strings that provides character intervals for line numbers in a string. Here is the code from 1.4: > > intervalOfLine: aLineNumber > > "Answer an interval spanning between the first and the last character of the line from aLineNumber" > > | lineIndex | > lineIndex := 0. > self lineIndicesDo: [ :start :endWithoutDelimiters :end | > lineIndex := lineIndex + 1. > lineIndex = aLineNumber ifTrue: [ ^ start to: end ] ]. > ^ 0 to: 0 > > Now, this method is missing in Pharo 2.0. Is there a particular reason for omitting the package? Is there a replacement for the pckage? > > tx, > Usman

Nov. 23, 2012

Re: [Pharo-users] Connecting to a C++ dll

by Igor Stasenko

C++ and FFI = Forget It just google for it.. you will see that literally no single language which fully supports it.. most of things require a lot of extra non-trivial steps and not always working.. On 23 November 2012 09:27, dimitris chloupis <thekilon(a)yahoo.co.uk> wrote: > > here you go > > https://gforge.inria.fr/scm/viewvc.php/*checkout*/PharoByExampleTwo-Eng/Ali… > > I am not expert on these things and the chapter I linked is for C and not > C++ but until some expert replies you may have success in trying this > ________________________________ > From: Shanu Kalra <shanukalra25(a)gmail.com> > To: Pharo-users(a)lists.gforge.inria.fr > Sent: Friday, 23 November 2012, 7:16 > Subject: [Pharo-users] Connecting to a C++ dll > > Hi, > > I am new to smalltalk and I have just started using Pharo. I am trying to > read a C++ function from a dll and then display output in pharo. I tried > using FFI , but I am unable to implement it in this scenario. Can anyone > please help me with this? > > Regards > Shanu > > -- Best regards, Igor Stasenko.

Nov. 23, 2012

Re: [Pharo-users] Connecting to a C++ dll

by dimitris chloupis

here you go https://gforge.inria.fr/scm/viewvc.php/*checkout*/PharoByExampleTwo-Eng/Ali… I am not expert on these things and the chapter I linked is for C and not C++ but until some expert replies you may have success in trying this ________________________________ From: Shanu Kalra <shanukalra25(a)gmail.com> To: Pharo-users(a)lists.gforge.inria.fr Sent: Friday, 23 November 2012, 7:16 Subject: [Pharo-users] Connecting to a C++ dll Hi, I am new to smalltalk and I have just started using Pharo. I am trying to read a C++ function from a dll and then display output in pharo. I tried using FFI , but I am unable to implement it in this scenario. Can anyone please help me with this? Regards Shanu

Nov. 23, 2012

Connecting to a C++ dll

by Shanu Kalra

Hi, I am new to smalltalk and I have just started using Pharo. I am trying to read a C++ function from a dll and then display output in pharo. I tried using FFI , but I am unable to implement it in this scenario. Can anyone please help me with this? Regards Shanu

Nov. 23, 2012

Re: [Pharo-users] CollectionExtensions missing in Pharo 2.0

by Marcus Denker

Hello, CollectionExtensions is a package of Moose, it was never in Pharo. It has not been integrated because nobody yet cared to coordinate to integrate the CollectionExtensions into collections (those parts that are generally useful). Marcus On Nov 22, 2012, at 4:37 PM, Usman Bhatti <usman.bhatti(a)gmail.com> wrote: > Hello all, > > I remarked that the package CollectionExtensions is missing in Pharo 2.0. We are using a useful method provided by the package on strings that provides character intervals for line numbers in a string. Here is the code from 1.4: > > intervalOfLine: aLineNumber > > "Answer an interval spanning between the first and the last character of the line from aLineNumber" > > | lineIndex | > lineIndex := 0. > self lineIndicesDo: [ :start :endWithoutDelimiters :end | > lineIndex := lineIndex + 1. > lineIndex = aLineNumber ifTrue: [ ^ start to: end ] ]. > ^ 0 to: 0 > > Now, this method is missing in Pharo 2.0. Is there a particular reason for omitting the package? Is there a replacement for the pckage? > > tx, > Usman -- Marcus Denker -- http://marcusdenker.de

Nov. 22, 2012

CollectionExtensions missing in Pharo 2.0

by Usman Bhatti

Hello all, I remarked that the package CollectionExtensions is missing in Pharo 2.0. We are using a useful method provided by the package on strings that provides character intervals for line numbers in a string. Here is the code from 1.4: intervalOfLine: aLineNumber "Answer an interval spanning between the first and the last character of the line from aLineNumber" | lineIndex | lineIndex := 0. self lineIndicesDo: [ :start :endWithoutDelimiters :end | lineIndex := lineIndex + 1. lineIndex = aLineNumber ifTrue: [ ^ start to: end ] ]. ^ 0 to: 0 Now, this method is missing in Pharo 2.0. Is there a particular reason for omitting the package? Is there a replacement for the pckage? tx, Usman

Nov. 22, 2012

Re: [Pharo-users] FileTree queries

by Chris

I think all I did was to move the contents of recursiveDelete into MCFileTreeFileDirectoryUtils class>>deleteAll: and guard clause on directory names from an ignore list. This isn't really very satisfactory because 2.0 uses FileSystem and other Smalltalk dialects would presumably require the same treatment as well. > Chris, > > Ah ... you were talking about the svn meta data:) > > So yes, FileTree was nuking the whole directory structure (including svn meta data) ... yuk, that is a bug[1]:) > > If you could submit a pull request with your patch for this, that'd be great! > > Dale > > [1] https://github.com/dalehenrich/filetree/issues/63 > > ----- Original Message ----- > | From: "Chris" <cpmbailey(a)btinternet.com> > | To: "A friendly place where any question about pharo is welcome" <pharo-users(a)lists.gforge.inria.fr> > | Sent: Tuesday, November 20, 2012 2:16:49 PM > | Subject: Re: [Pharo-users] FileTree queries > | > | I think it is just because SVN 1.7 and git hold all of their meta > | information in the root directory whereas 1.6 holds it at every level > | of > | the directory tree. FileTree seems to simply replace a package > | directory > | whenever you commit so takes some of SVN's internals with it. I > | actually > | 'hacked' it by just saying don't delete any directories called .svn > | which seemed to work but have since just gone back to your version > | and > | made sure to use 1.7. > | > | I will let you know how I get on with the preview. Although I am > | managing to run things without the meta currently and just using > | Gofer > | to load. I had one dependency issue which I tried to resolve by going > | back to the Configuration but have got around it another way now. > | > | > Chris, > | > > | > Yes, the Baseline just formalizes the bleedingEdge... > | > > | > The meta data is just needed for now ... it does interfere when > | > you are doing git/svn level merges, so I need to eventually get > | > rid of it... > | > > | > Not sure I understand the issue with SVN 1.6....is there a more > | > specific problem? > | > > | > Please look over the documentation for the Preview release and let > | > me know where there are shortcomings and definitely let me know > | > about odd behavior ... I'm not 100% comfortable with some of the > | > behavior of the API so I'll be interested in your take... > | > > | > Dale > | > > | > ----- Original Message ----- > | > | From: "Chris" <cpmbailey(a)btinternet.com> > | > | To: "A friendly place where any question about pharo is welcome" > | > | <pharo-users(a)lists.gforge.inria.fr> > | > | Sent: Tuesday, November 20, 2012 11:12:25 AM > | > | Subject: Re: [Pharo-users] FileTree queries > | > | > | > | Thanks Dale, I'll give the Baseline stuff a go. I've only been > | > | trying > | > | to > | > | use my old Configuration for it's dependency information and > | > | purely > | > | in a > | > | loadBleedingEdge capacity, as it's version capabilities are > | > | obviously > | > | redundant in this context. I'll try it with the meta back in > | > | there, > | > | but > | > | was having some issues with the version file and conflicts on > | > | each > | > | commit. > | > | > | > | Oh and just as an aside, it's worth pointing out that FileTree is > | > | only > | > | compatible with SVN 1.7 (all the meta contained at the top level) > | > | as > | > | I > | > | found when I tried it on a system with 1.6 installed :-) > | > | > | > | > Chris, > | > | > > | > | > You have to have the meta data for things to work ... > | > | > > | > | > Speaking of Metacello... since you are using SVN for managing > | > | > our > | > | > package source, it isn't really necessary to manage the > | > | > classical > | > | > ConfigurationOf (saving the mcz file versions for each commit > | > | > to > | > | > your SVN repo is redundant), so in the Metacello Preview I have > | > | > introduced the notion of a BaselineOf where you only need to > | > | > maintain the baseline information (no versions). The BaselineOf > | > | > can be used interchangeably with the ConfigurationOf and is > | > | > much > | > | > less overhead to maintain ... > | > | > > | > | > The Preview[1] is not in general release, but I use it on a > | > | > daily > | > | > basis for my work (I store my code on github) and would welcome > | > | > feedback on your experience using the Preview ... > | > | > > | > | > Dale > | > | > > | > | > [1] https://github.com/dalehenrich/metacello-work > | > | > ----- Original Message ----- > | > | > | From: "CHRIS BAILEY" <cpmbailey(a)btinternet.com> > | > | > | To: "A friendly place where any question about pharo is > | > | > | welcome" > | > | > | <pharo-users(a)lists.gforge.inria.fr> > | > | > | Sent: Friday, November 16, 2012 12:27:38 AM > | > | > | Subject: Re: [Pharo-users] FileTree queries > | > | > | > | > | > | My Metacello configuration doesn't want to load from FileTree > | > | > | if > | > | > | the > | > | > | monticello.meta directories are missing. This makes some > | > | > | sense to > | > | > | me > | > | > | as it won't be able to resolve any actual version numbers or > | > | > | releases. However all it can possibly do is just grab the > | > | > | packages > | > | > | from disk anyway. I saw something along the lines of > | > | > | Metacello > | > | > | new > | > | > | configuration: xxx; load somewhere whereas I still have my > | > | > | normal > | > | > | ConfigurationOfXXX loadBleedingEdge. But I don't have a > | > | > | Metacello > | > | > | class in my 1.4 Summer image. Do I need to get hold of this? > | > | > | > | > | > | --- On Thu, 15/11/12, Paul DeBruicker <pdebruic(a)gmail.com> > | > | > | wrote: > | > | > | > | > | > | > From: Paul DeBruicker <pdebruic(a)gmail.com> > | > | > | > Subject: Re: [Pharo-users] FileTree queries > | > | > | > To: "A friendly place where any question about pharo is > | > | > | > welcome" > | > | > | > <pharo-users(a)lists.gforge.inria.fr> > | > | > | > Date: Thursday, 15 November, 2012, 17:25 > | > | > | > On 11/15/2012 09:16 AM, Chris wrote: > | > | > | > > Hi, > | > | > | > > > | > | > | > > I've just migrated to using FileTree with SVN and am > | > | > | > wondering if it is > | > | > | > > possible to use it without the monticello.meta? You > | > | > | > obviously get a lot > | > | > | > > of merge conflicts with these and the version file in > | > | > | > particular, and I > | > | > | > > didn't really see much benefit when using SVN for > | > | > | > commit comments and > | > | > | > > revision histories and so forth so have just been > | > | > | > ignoring / deleting > | > | > | > > them. It seems to work ok for the most part and by > | > | > | > loading packages with > | > | > | > > Gofer, but I feel like I'm fighting the system a bit > | > | > | > and have not had > | > | > | > > much luck with Metacello in particular which I would > | > | > | > like to get working > | > | > | > > again. Can anyone advise? > | > | > | > > > | > | > | > > Thanks > | > | > | > > Chris > | > | > | > > > | > | > | > > | > | > | > Why not just make SVN ignore those files? > | > | > | > > | > | > | > https://sdesmedt.wordpress.com/2006/12/10/how-to-make-subversion-ignore-fil… > | > | > | > > | > | > | > > | > | > | > | > | > | > | > | > > | > | > > | > | > | > | > | > | > | > > | > > | > | > | > >

Nov. 21, 2012