Beginners November 2011

beginners@lists.squeakfoundation.org

22 participants
17 discussions

PipeableOSProcess incremental output
by Sean P. DeNigris 28 Nov '11

28 Nov '11

How do I get the output and error of a PipeableOSProcess command line-by-line as it comes, like CommandShell does? I found #setNonBlockingOutput for the output, but "pipeFromError setNonBlocking" doesn't seem to do the same for the errors. Thanks. Sean -- View this message in context: http://forum.world.st/PipeableOSProcess-incremental-output-tp3946435p394643… Sent from the Squeak - Beginners mailing list archive at Nabble.com.

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Class Morph subclassing Object Morph. Possible ?
by dimitris chloupis 27 Nov '11

27 Nov '11

I was embedding one morph inside another and I then i hit the "make own class" menu option, it made me a class that subclassed imagemorph class , made sense. But of course the new class had not the embedded morphs. I see that all a morph is doing is to have a instance variable submorphs and stores there which morphs are embedded. So I was wondering if it was possible instead of subclassing from the ImageMorph class to subclass from my actual object ImageMorphxxx , so that submorphs instance variable to become a class variable and then new class to have embedded all the sub moprhs. Is that possible or am I talking non sense here ? All i want is my new class to come embedded with all its submorphs. Because as it is , its just anempty class.

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What makes Smalltalk different
by Bert Freudenberg 23 Nov '11

23 Nov '11

(This is from an answer to a question on StackOverflow http://stackoverflow.com/questions/8222489 It might be helpful to some newbies on this list so I'm re-posting) =================================== Q: (paraphrased) I want to learn Smalltalk but without the baggage of an IDE. Just let me use my favorite text editor, that's much easier. A: It is not helpful to learn Smalltalk as just another language. You would be missing the point entirely. Smalltalk's graphical environment is not just an IDE. The core of the system is simply objects. The interface provides various ways to create objects and interact with them. The language is just a convenient way to create messages to the objects. It is secondary to the objects themselves. In other OO languages, you write your program, then you run it, which creates objects in memory. Not so in Smalltalk. You create objects in memory (e.g. class objects) and then send messages to e.g. add methods. But a class object is only created once, not every time you "run your program". There is no such thing as "your program", in fact. There is no "main". It's just a world of objects, some longer-lived, some temporary. In fact, in the system there are objects that were created 30 years ago. Literally. The objects are just frozen to disk as a memory dump (a file which we call "image") and unfrozen later (possibly on a different machine). That image, the world of objects, is the primary artifact in Smalltalk. There is a sources file, yes, but that's just a database of text snippets to not take up so much RAM. You cannot edit this file by hand (objects in the image use absolute file offsets into the sources file). You cannot re-create the system from the sources file - the system was bootstrapped a long time ago and from then on only modified. It's true that superficially the Smalltalk GUI looks just like another IDE. No coincidence - Eclipse was originally written by Smalltalkers in Smalltalk. But there is the crucial difference that in regular IDEs you just manipulate text files. A text editor is a valid alternative for that. In Smalltalk, the GUI manipulates objects in memory. A text editor can not do that. And as for what Smalltalk to use, I would recommend Squeak. Very friendly community, very nice environment, and subscribing to the original Smalltalk vision of creating a great personal computing environment for everyone. - Bert -

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Squeak Smalltalk from the start videos
by Lawson English 23 Nov '11

23 Nov '11

Hi all, I'm creating a series of videos for programming Squeak that are intended for a reasonably beginning audience. I don't cover questions like "what is an ASCII character?" and the like, but I don't make too many assumptions about a viewer's background past the assumption that they know what "computer programming" means at some level. Please feel free to critique/make suggestions or otherwise offer feedback. Squeak from the very start Starting with squeak programming with as few assumptions as possible http://www.youtube.com/playlist?list=PL6601A198DF14788D&feature=viewall Lawson

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Re: [Newbies] What makes Smalltalk different
by Gary Dunn 22 Nov '11

22 Nov '11

Well put! Please can someone with permissions capture this on our swiki? Gary Dunn Open Slate Project http://openslate.org On Nov 22, 2011 1:35 AM, "Bert Freudenberg" <bert(a)freudenbergs.de> wrote: (This is from an answer to a question on StackOverflow http://stackoverflow.com/questions/8222489 It might be helpful to some newbies on this list so I'm re-posting) =================================== Q: (paraphrased) I want to learn Smalltalk but without the baggage of an IDE. Just let me use my favorite text editor, that's much easier. A: It is not helpful to learn Smalltalk as just another language. You would be missing the point entirely. Smalltalk's graphical environment is not just an IDE. The core of the system is simply objects. The interface provides various ways to create objects and interact with them. The language is just a convenient way to create messages to the objects. It is secondary to the objects themselves. In other OO languages, you write your program, then you run it, which creates objects in memory. Not so in Smalltalk. You create objects in memory (e.g. class objects) and then send messages to e.g. add methods. But a class object is only created once, not every time you "run your program". There is no such thing as "your program", in fact. There is no "main". It's just a world of objects, some longer-lived, some temporary. In fact, in the system there are objects that were created 30 years ago. Literally. The objects are just frozen to disk as a memory dump (a file which we call "image") and unfrozen later (possibly on a different machine). That image, the world of objects, is the primary artifact in Smalltalk. There is a sources file, yes, but that's just a database of text snippets to not take up so much RAM. You cannot edit this file by hand (objects in the image use absolute file offsets into the sources file). You cannot re-create the system from the sources file - the system was bootstrapped a long time ago and from then on only modified. It's true that superficially the Smalltalk GUI looks just like another IDE. No coincidence - Eclipse was originally written by Smalltalkers in Smalltalk. But there is the crucial difference that in regular IDEs you just manipulate text files. A text editor is a valid alternative for that. In Smalltalk, the GUI manipulates objects in memory. A text editor can not do that. And as for what Smalltalk to use, I would recommend Squeak. Very friendly community, very nice environment, and subscribing to the original Smalltalk vision of creating a great personal computing environment for everyone. - Bert - _______________________________________________ Beginners mailing list Beginners(a)lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners

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Another Answer
by Overcomer Man 22 Nov '11

22 Nov '11

Q. I want to learn Smalltalk but without the baggage of an IDE. Just let me use my favorite text editor, that's much easier. You can do it but you have to write your code in "fileIn" format so Smalltalk will accept your external editor's code, compile, and execute it. "fileIn" formats can vary between Smalltalks. The baggage of the IDE is essentially an object database of precompiled library software. You can compare various Smalltalks to a lean C++ IDE like Bloodshed, a bloated C++ IDE like Qt, and a maximally bloated Visual Studio.net. As one programmer you don't have time to fix everything to your taste - you'll be lucky to learn a library enough to find the tools you want to do your task. Libraries can sometime include 30 year old bugs that nobody has ever fixed because they are too hard to discover. Usenet tells of a major military project written in Smalltalk which was cancelled and replaced with C++ because of phantom ships appearing when they shouldn't. They couldn't figure it out and fix it. There are several possible reasons for this. Professional code tends to be written for maximum understanding by users, but free code is often written for the fun of the programmer, so real meaningful object names give way to convoluted names that only have meaning in the worldview of that particular programmer. If the function they do is important enough, sometimes these become popular, making the function hard to learn for everyone else. Another reason is executing code is notoriously difficult to debug in some circumstances, especially when other code in the IDE depends on it. Changing the definition of terms in a particular object's communication with another object might fix one problem and create ten more. So essentially one has to learn the entire library to redevelop something that's been around a while. On a positive note, Cuis provides a leaner library than Squeak and is also licensed so you can deliver it IDE and all with your application code running on top, so you can deliver a lot more value to your users than with an ordinary exe.

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smalltalk and squeak
by James O'Brien 18 Nov '11

18 Nov '11

I don't get the connection between smalltalk and squeak. For example, I can code a counter with smalltalk in the workspace. When I do it a functioning counter appears. When I close the workspace the calculator still works, but what happens to the code? Where is it? If I open a viewer of one of the buttons and change the button's color, what happens to the code I started with? Where is it? How do I view it again? I can also build a calculator with squeak as described at http://wiki.squeak.org/squeak/1827. But, again, where is the smalltalk code?

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Polymorph Install Fails
by dimitris chloupis 18 Nov '11

18 Nov '11

I am following instruction from here http://wiki.squeak.org/squeak/6005 I am using Universe Package Manager --> User Interface --> Polymorph ToolBuilder 1.4 I am getting this error http://i47.photobucket.com/albums/f180/TheKilon/ScreenShot2011-11-16at10104… I think its the same problem with Modecello , it can't find the PluggableStandardWindow package/class anyone knows how to resolve this. I though the purpose of the browser was to install all dependencies.

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Polymorph Install Fails
by kilon 16 Nov '11

16 Nov '11

I am following instruction from here http://wiki.squeak.org/squeak/6005 http://wiki.squeak.org/squeak/6005 I am using Universe Package Manager --> User Interface --> Polymorph ToolBuilder 1.4 I am getting this error http://i47.photobucket.com/albums/f180/TheKilon/ScreenShot2011-11-16at10104… http://i47.photobucket.com/albums/f180/TheKilon/ScreenShot2011-11-16at10104… I think its the same problem with Modecello , it can't find the PluggableStandardWindow package/class anyone knows how to resolve this. I though the purpose of the browser was to install all dependencies. -- View this message in context: http://forum.world.st/Polymorph-Install-Fails-tp4077735p4077735.html Sent from the Squeak - Beginners mailing list archive at Nabble.com.

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Re: Beginners Digest, Vol 67, Issue 8
by Joshua Miller 15 Nov '11

15 Nov '11

Well what i meant was setting up the environment to test it becuase after trying to install OpenGL in the the squeak all in one(which installed properly), it failed when it came to typing in OpenGL example saying something like "failed to create renderer so i thought i might of did something wrong in trying to use the all in one to learn squeak On Tue, Nov 15, 2011 at 7:00 AM, <beginners-request(a)lists.squeakfoundation.org> wrote: > Send Beginners mailing list submissions to > beginners(a)lists.squeakfoundation.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.squeakfoundation.org/mailman/listinfo/beginners > or, via email, send a message with subject or body 'help' to > beginners-request(a)lists.squeakfoundation.org > > You can reach the person managing the list at > beginners-owner(a)lists.squeakfoundation.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Beginners digest..." > > > Today's Topics: > > 1. Installing squeak and such? (Joshua Miller) > 2. Re: Installing squeak and such? (Sean P. DeNigris) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 14 Nov 2011 10:18:18 -0500 > From: Joshua Miller <milleja46(a)gmail.com> > Subject: [Newbies] Installing squeak and such? > To: beginners(a)lists.squeakfoundation.org > Message-ID: > <CAKoEMEdAbPxVTgDko8ucwV2fcOFt-8oC2ZKCmON0vB+Uo7wYZQ(a)mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Ok i've started to try and learn squeak so maybe i can help with open > cobalt and such. But i'm a little lost in trying to learn it.... when > following Lawson(one of the devs for the project) youtube vids i've > gotten stuck on the CroquetOpenGL part, and squeak by example seems > very confusing when trying to use the all-in-one package...so is there > a proper guide on how to set it up so that i can start learning it? > and some better book as well would be nice.... > > > ------------------------------ > > Message: 2 > Date: Mon, 14 Nov 2011 07:51:44 -0800 (PST) > From: "Sean P. DeNigris" <sean(a)clipperadams.com> > Subject: [Newbies] Re: Installing squeak and such? > To: beginners(a)lists.squeakfoundation.org > Message-ID: <1321285904247-4039875.post(a)n4.nabble.com> > Content-Type: text/plain; charset=us-ascii > > > Joshua Miller wrote: >> >> so is there >> a proper guide on how to set it up so that i can start learning it? >> > I'm not at all clear what you're asking. What image are you using? If it's > an open cobalt image, you should ask on that list. If it's a Squeak image, > and you have the all-in-one, then there's nothing to set up. > > > Joshua Miller wrote: >> >> and some better book as well would be nice.... >> > You're in luck there. See http://stephane.ducasse.free.fr/FreeBooks.html > > -- > View this message in context: http://forum.world.st/Installing-squeak-and-such-tp4039762p4039875.html > Sent from the Squeak - Beginners mailing list archive at Nabble.com. > > > ------------------------------ > > _______________________________________________ > Beginners mailing list > Beginners(a)lists.squeakfoundation.org > http://lists.squeakfoundation.org/mailman/listinfo/beginners > > > End of Beginners Digest, Vol 67, Issue 8 > **************************************** >

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Beginners November 2011