- Pharo-dev - lists.pharo.org

Re: [Pharo-project] Error when 'Loading 11313-Pha-CleaningCompilerTests...'

by Henrik Johansen

On Apr 21, 2010, at 6:44 05PM, Sean P. DeNigris wrote: > > > Henrik Johansen wrote: >> >> "SqueakSource is currently down. We are sorry for the inconvenience and >> working on the problem. In the meantime you can still commit to a >> directory repository on your disk and later copy the versions to >> SqueakSource." >> > > Oh, thanks. I didn't do too much investigating, lol. > > And, maybe the error message could be better than 'Error: can''t find EOCD > position.' > > Sean Well... I'm not a network specialist, but the following code looks kind of shady: HTTPSocket class >> httpGetDocument: url args: args accept: mimeType request: requestString *snip* "a 400-series error" sock responseCode first = $4 ifTrue: [^ header, aStream contents]. No idea how much existing code will break if you, say, raise an Exception there instead :) Cheers, Henry

April 21, 2010

Re: [Pharo-project] Hints and clues for a Pharo newb

by HernÃ¡n Morales Durand

2010/4/21 Peter Hugosson-Miller <oldmanlink(a)gmail.com>: > Hi all, > So it's time for me to stop lurking and do some stuff. However, although I > am an experienced Smalltalk programmer (VisualAge Smalltalk continuously > since 1995), I am a complete newb when it comes to Pharo and Squeak, it's > hard to find my way around, and it's going to take me some time to get up to > speed. > I'm working on a small improvement to the testing framework, using ideas > that I have found to be very useful in my daily job over the past 15 years. > Note that I am doing this from scratch, so that I don't accidentally steal > anything that I've done in my work, but I know how it all works in > VisualAge, so I feel sure that I'll eventually be able to find the > corresponding classes and methods in Pharo. > What I would like are a few hints, clues and nudges in the right direction > for scenarios and questions that I will describe in this thread. What I > *don't* want are full-blown solutions, because then I won't learn anything. > I hope that some kind souls will be able to give me a little help in the > beginning that will eventually bring me up to speed and let me be > productive. > So to start with, one scenario and one question: > 1) I want to find or write a method on Process that will print a stack trace > onto a supplied Stream. Ideally I'd like to be able to decide the start and > stop depth of the trace, so for example if I know that the top 4 stack > frames will always be uninteresting, I would want to be able to write > something like this: > Â Â Â Â Processor activeProcess printStackFrom: 5 to: 15 on: aStream. > 2) What *exactly* is "thisContext"? It appears to be a reserved word in > Pharo, just like the familiar "self", "super", "true", "false", "nil" that > are always reserved in Smalltalk. I'd also like to get an idea of what it's > good for, and if anyone can describe it in terms of something that is in > VisualAge, that would be nice too :-) thisContext is a special object for representing an activation in a stack frame in a stack-based VM. There are two kinds of contexts: Method Contexts and Block Contexts. Context creation is optimized in the VM in most Smalltalks, so it's only really created as an object in the environment (reified) when it's specifically needed through "thisContext". You may emulate its usage in VisualAge writing something like [] homeContext and in a method it would be >>thisContext "returns the context of the sender" ^[] homeContext sender although with some limitations. There are several applications related with computational reflection (Reflective Programming, Meta-Programming, MOP, etc) which makes use of the current context. Cheers, HernÃ¡n > BTW, if this is not the appropriate place for a thread like this, then > please tell me where I should put it (politely, of course :-p) > -- > Cheers, > Peter > > _______________________________________________ > Pharo-project mailing list > Pharo-project(a)lists.gforge.inria.fr > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project >

April 21, 2010

Re: [Pharo-project] Some more dev on Polymorph for DrGeo

by Hilaire Fernandes

Just uploaded a latest snapshot for XMl support. Hilaire

April 21, 2010

Re: [Pharo-project] Hints and clues for a Pharo newb

by Henrik Johansen

On Apr 21, 2010, at 6:09 02PM, Peter Hugosson-Miller wrote: > Hi all, > > So it's time for me to stop lurking and do some stuff. However, although I am an experienced Smalltalk programmer (VisualAge Smalltalk continuously since 1995), I am a complete newb when it comes to Pharo and Squeak, it's hard to find my way around, and it's going to take me some time to get up to speed. > > I'm working on a small improvement to the testing framework, using ideas that I have found to be very useful in my daily job over the past 15 years. Note that I am doing this from scratch, so that I don't accidentally steal anything that I've done in my work, but I know how it all works in VisualAge, so I feel sure that I'll eventually be able to find the corresponding classes and methods in Pharo. > > What I would like are a few hints, clues and nudges in the right direction for scenarios and questions that I will describe in this thread. What I *don't* want are full-blown solutions, because then I won't learn anything. I hope that some kind souls will be able to give me a little help in the beginning that will eventually bring me up to speed and let me be productive. > > So to start with, one scenario and one question: > > 1) I want to find or write a method on Process that will print a stack trace onto a supplied Stream. Ideally I'd like to be able to decide the start and stop depth of the trace, so for example if I know that the top 4 stack frames will always be uninteresting, I would want to be able to write something like this: > > Processor activeProcess printStackFrom: 5 to: 15 on: aStream. > > 2) What *exactly* is "thisContext"? It appears to be a reserved word in Pharo, just like the familiar "self", "super", "true", "false", "nil" that are always reserved in Smalltalk. I'd also like to get an idea of what it's good for, and if anyone can describe it in terms of something that is in VisualAge, that would be nice too :-) > > BTW, if this is not the appropriate place for a thread like this, then please tell me where I should put it (politely, of course :-p) > > -- > Cheers, > Peter > ________________ I haven't used VA, but for instance, 2) allows you to write 1) as: Process >> printStackFrom: start to: end on: aStream ((thisContext stackOfSize: end) removeFirst: start; yourself ) do: [:each | each printOn: aStream. aStream nextPut: Character cr]. ;) Cheers, Henry

April 21, 2010

[Pharo-project] Doc about Coral?

by Nicolas Petton

Hi, I was wondering if there is some documentation about Coral? I would like to play a bit with it :) Cheers, Nico

April 21, 2010

Re: [Pharo-project] Error when 'Loading 11313-Pha-CleaningCompilerTests...'

by Sean P. DeNigris

Henrik Johansen wrote: > > "SqueakSource is currently down. We are sorry for the inconvenience and > working on the problem. In the meantime you can still commit to a > directory repository on your disk and later copy the versions to > SqueakSource." > Oh, thanks. I didn't do too much investigating, lol. And, maybe the error message could be better than 'Error: can''t find EOCD position.' Sean -- View this message in context: http://n4.nabble.com/Error-when-Loading-11313-Pha-CleaningCompilerTests-tp2… Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

April 21, 2010

Re: [Pharo-project] Hints and clues for a Pharo newb

by Michael Roberts

thisContext reifies the activation contexts (if that is the exact way to describe it?). I don't believe you have it in VA. So you can just walk it. If you look for some of the fatal error handling logic you can see how the debug log is written out on crash containing the stack. Cheers mike On Wednesday, April 21, 2010, Peter Hugosson-Miller <oldmanlink(a)gmail.com> wrote: > Hi all, > So it's time for me to stop lurking and do some stuff. However, although I am an experienced Smalltalk programmer (VisualAge Smalltalk continuously since 1995), I am a complete newb when it comes to Pharo and Squeak, it's hard to find my way around, and it's going to take me some time to get up to speed. > > > > > > I'm working on a small improvement to the testing framework, using ideas that I have found to be very useful in my daily job over the past 15 years. Note that I am doing this from scratch, so that I don't accidentally steal anything that I've done in my work, but I know how it all works in VisualAge, so I feel sure that I'll eventually be able to find the corresponding classes and methods in Pharo. > > > > > > What I would like are a few hints, clues and nudges in the right direction for scenarios and questions that I will describe in this thread. What I *don't* want are full-blown solutions, because then I won't learn anything. I hope that some kind souls will be able to give me a little help in the beginning that will eventually bring me up to speed and let me be productive. > > > > > So to start with, one scenario and one question: > 1) I want to find or write a method on Process that will print a stack trace onto a supplied Stream. Ideally I'd like to be able to decide the start and stop depth of the trace, so for example if I know that the top 4 stack frames will always be uninteresting, I would want to be able to write something like this: > > > Â Â Â Â Processor activeProcess printStackFrom: 5 to: 15 on: aStream. > 2) What *exactly* is "thisContext"? It appears to be a reserved word in Pharo, just like the familiar "self", "super", "true", "false", "nil" that are always reserved in Smalltalk. I'd also like to get an idea of what it's good for, and if anyone can describe it in terms of something that is in VisualAge, that would be nice too :-) > > > BTW, if this is not the appropriate place for a thread like this, then please tell me where I should put it (politely, of course :-p) > -- > Cheers, > Peter > >

April 21, 2010

[Pharo-project] Some more dev on Polymorph for DrGeo

by Hilaire Fernandes

Known to work with Pharo 1.0. Someone asked for a more elaborated UI for DrGeo, here are some progresses in this polymorphization of DrGeo. In its latest Monticello package one can grab DrGeo at http://www.squeaksource.com/DrGeoII See enclosed screenshot for a quick view. To start a DrGeo instance, do a "DrGeo new" in a workspace and enjoy the UI. Beware, style tools does not work in the toolbar. It is also possible to use DrGeo as a service for Etoys when executing a "DrGeo sample openInWorld" It is also possible to load XML description of DrGeo 1.1 geometric sketch, if one is interested you can grab it at http://svn.gnome.org/viewvc/drgeo/trunk/examples/figures/ and load a sketch with a command: DrGeo newXml: path Beware sketch with embedded Scheme code will not work (just try) Working sketch: mercedes, euler-line, DrGeoII comes with a better interface for scripting with Smalltalk script, empower by the IDE, much nice than the former Scheme one. Elaborated demonstration at http://blog.ofset.org/hilaire/index.php?post/script-drgeo (automatic translation link with Google in a comment, at the end of the article)

April 21, 2010

Re: [Pharo-project] Hints and clues for a Pharo newb

by Schwab,Wilhelm K

Peter, Welcome aboard! IMHO, this is a fine place for the discussion that will hopefully result. Two links that I find useful are: http://dir.gmane.org/gmane.comp.lang.smalltalk.pharo.devel http://dir.gmane.org/gmane.comp.lang.smalltalk.squeak.general as they allow searching of the lists. Have you downloaded Pharo by Example? You might also want to get a print copy from Lulu. Learning your way around the Monticello GUI will be important. It has some quirks that I discovered the hard way; they should live in the pharo-dev archive above. In short, class categories/package names are case-sensitive, but you might have to remove the working copy of a package that somehow (your fault or not) picked up an undesired capitalization, e.g. ThisORThat vs. ThisOrThat before you can create the one you want. Method categoris (ab)used to package methods (*packageNameGoesHere) are apparently not case-sensitive. That's about all the damage I have time to do at the moment. What brings you to Pharo? We're glad to have you, but your thoughts on the system, what it does well, and what needs to improve could be helpful. Bill ________________________________ From: pharo-project-bounces(a)lists.gforge.inria.fr [mailto:pharo-project-bounces@lists.gforge.inria.fr] On Behalf Of Peter Hugosson-Miller Sent: Wednesday, April 21, 2010 11:09 AM To: Pharo-project(a)lists.gforge.inria.fr Subject: [Pharo-project] Hints and clues for a Pharo newb Hi all, So it's time for me to stop lurking and do some stuff. However, although I am an experienced Smalltalk programmer (VisualAge Smalltalk continuously since 1995), I am a complete newb when it comes to Pharo and Squeak, it's hard to find my way around, and it's going to take me some time to get up to speed. I'm working on a small improvement to the testing framework, using ideas that I have found to be very useful in my daily job over the past 15 years. Note that I am doing this from scratch, so that I don't accidentally steal anything that I've done in my work, but I know how it all works in VisualAge, so I feel sure that I'll eventually be able to find the corresponding classes and methods in Pharo. What I would like are a few hints, clues and nudges in the right direction for scenarios and questions that I will describe in this thread. What I *don't* want are full-blown solutions, because then I won't learn anything. I hope that some kind souls will be able to give me a little help in the beginning that will eventually bring me up to speed and let me be productive. So to start with, one scenario and one question: 1) I want to find or write a method on Process that will print a stack trace onto a supplied Stream. Ideally I'd like to be able to decide the start and stop depth of the trace, so for example if I know that the top 4 stack frames will always be uninteresting, I would want to be able to write something like this: Processor activeProcess printStackFrom: 5 to: 15 on: aStream. 2) What *exactly* is "thisContext"? It appears to be a reserved word in Pharo, just like the familiar "self", "super", "true", "false", "nil" that are always reserved in Smalltalk. I'd also like to get an idea of what it's good for, and if anyone can describe it in terms of something that is in VisualAge, that would be nice too :-) BTW, if this is not the appropriate place for a thread like this, then please tell me where I should put it (politely, of course :-p) -- Cheers, Peter

April 21, 2010

Re: [Pharo-project] Why does datedVersion appear in both SmalltalkImage and SystemVersion?

by Henrik Johansen

On Apr 21, 2010, at 5:21 40PM, Sean P. DeNigris wrote: > > Why does datedVersion appear in both SmalltalkImage and SystemVersion? > > SmalltalkImage delegates to SystemVersion. Why have both? > > Sean > -- > View this message in context: http://n4.nabble.com/Why-does-datedVersion-appear-in-both-SmalltalkImage-an… > Sent from the Pharo Smalltalk mailing list archive at Nabble.com. > > _______________________________________________ > Pharo-project mailing list > Pharo-project(a)lists.gforge.inria.fr > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project > Because of backwards compatability, and because some people still use/prefer Smalltalk datedVersion over SystemVersion datedVersion. Cheers, Henry

April 21, 2010