Beginners September 2008

beginners@lists.squeakfoundation.org

56 participants
87 discussions

names for boolean keyword arguments
by Mark Volkmann 27 Sep '08

27 Sep '08

Is there a convention for naming keywork arguments that should have a boolean value? When it's not a boolean, it seems the convention is value: aValue That doesn't seem right for booleans though. I'd end up with arguments like expensive: anExpensive --- Mark Volkmann

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enumerated values
by Mark Volkmann 27 Sep '08

27 Sep '08

Is there an equivalent of Java's enumerated values (enum) in Smalltalk? --- Mark Volkmann

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method naming advice
by Mark Volkmann 26 Sep '08

26 Sep '08

I hope I'm not exceeding the limit for questions in one day. I'm porting some Java code that deals with XML to Smalltalk. A Java class has these methods. public StartTagWAX attr(String name, Object value) ... public StartTagWAX attr(String prefix, String name, Object value) ... What would be good Smalltalk names for these methods? Here's my first guess. attrName:value: attrPrefix:name:value: Note that I don't really have a new to create Attr objects. I just need data describing an attribute so I can output it. --- Mark Volkmann

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Re: [Newbies] Mindstorms NXT and Squeak?
by Lukas Renggli 26 Sep '08

26 Sep '08

I wrote a basic communication library for the NXT. Michael Haupt extended it with some basic functionality. The code is under MIT and you can find the code here: http://source.lukas-renggli.ch/nxt.html Feel free to use and extend it. I don't have time to work on it right now. Cheers, Lukas On 9/26/08, Mark L. Miller, Ph.D. <mark.miller(a)learningtech.org> wrote: > Does anyone know if anyone is doing anything with Squeak and Mindstorms NXT? > Sorry if this has already been asked and answered. > Thanks, Mark > > -- > Mark L. Miller, Ph.D., President and Executive Director > The Miller Institute for Learning with Technology > A 501(c)(3) California Nonprofit Public Benefit Corporation > Tel: 650-598-0105 x203 Fax: 866-801-8667 > This message, including any attachments, is for the sole use of the > intended recipient(s) and may contain confidential or privileged > information; unauthorized review, use, disclosure or distribution is > prohibited. > _______________________________________________ > Beginners mailing list > Beginners(a)lists.squeakfoundation.org > http://lists.squeakfoundation.org/mailman/listinfo/beginners > -- Lukas Renggli http://www.lukas-renggli.ch

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squeak startup script
by Mark Volkmann 26 Sep '08

26 Sep '08

I see discussions on the web about starting squeak from a terminal window using "squeak -headless", but I don't have a squeak script. "which squeak" turns up nothing. I'm using Squeak3.10.2. Where can I get that startup script? --- Mark Volkmann

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Mindstorms NXT and Squeak?
by Mark L. Miller, Ph.D. 26 Sep '08

26 Sep '08

Does anyone know if anyone is doing anything with Squeak and Mindstorms NXT? Sorry if this has already been asked and answered. Thanks, Mark -- Mark L. Miller, Ph.D., President and Executive Director The Miller Institute for Learning with Technology A 501(c)(3) California Nonprofit Public Benefit Corporation Tel: 650-598-0105 x203 Fax: 866-801-8667 This message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential or privileged information; unauthorized review, use, disclosure or distribution is prohibited.

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Re: [Newbies] scripts
by Marcin Tustin 26 Sep '08

26 Sep '08

Well, doing all the timing management in one place may aid synchronisation. In any case, I second Subbu's sentiments. On 9/26/08, Ryan Zerby <tahognome(a)gmail.com> wrote: > > I'm a beginner myself, but I would think it would be better to have squeak > running all the time and let is handle the cron timing, and connecting to > the database (kind of like a service of it's own). I would think this would > be easier to debug and maintain as well as being more within the paradigm of > squeak. > > Better still would be if we got SqueakOS to the point where Squeak noobs > like myself could use it in place of Windows :) > > On Fri, Sep 26, 2008 at 10:33 AM, Mark Volkmann <mark(a)ociweb.com> wrote: > >> On Sep 26, 2008, at 9:29 AM, Bert Freudenberg wrote: >> >> Am 26.09.2008 um 06:49 schrieb Mark Volkmann: >>> >>> On Sep 26, 2008, at 8:03 AM, Randal L. Schwartz wrote: >>>> >>>> "Randal" == Randal L Schwartz <merlyn(a)stonehenge.com> writes: >>>>>>>>>> >>>>>>>>> >>>>> "Bert" == Bert Freudenberg <bert(a)freudenbergs.de> writes: >>>>>>>>>> >>>>>>>>> Bert> Am 26.09.2008 um 05:12 schrieb Mark Volkmann: >>>>> >>>>> Is it possible to run a Squeak program from a terminal window and >>>>>>>> have >>>>>>>> access to the stdin and stdout streams from the Smalltalk code? >>>>>>>> >>>>>>> >>>>> And the longer still answer (now that I've noticed "access to stdin and >>>>> stdout") is to use an image with OSProcess loaded, and then you can >>>>> get access as follows: >>>>> >>>>> me := ThisOSProcess thisOSProcess. >>>>> stdin := me stdIn. "acts like a Stream" >>>>> stdout := me stdOut. >>>>> stderr := me stdErr. >>>>> stderr print: Time now; cr. "put the time of day on my stderr output" >>>>> >>>> >>>> >>>> Thanks for the example code! Now I think all I need is to find out how >>>> to launch the code from a terminal window. At >>>> http://wiki.squeak.org/squeak/1914 I found this. >>>> >>>> "To initiate external shell processing, evaluate ''ExternalCommandShell >>>> stop'', save the image, and restart with ''squeak -headless myImage''." >>>> >>>> It's not clear to me what will be run when that last command is executed >>>> from a terminal window. Where would I put code like your example code above >>>> and how does the squeak command know to execute it? >>>> >>> >>> Perhaps you should let us know what you want to achieve in broader terms >>> first. Using Squeak in a headless way to do unix-style stream processing is >>> very unusual. It can be done but it is not something I would recommend to a >>> beginner. >>> >>> This is in contrast to many other languages which are most easily learned >>> by creating simple programs writing to stdin/stdout. The power of Squeak is >>> in the system (the development tools and frameworks), not so much the >>> language (which is powerful, too, but not really what sets Squeak apart). >>> >> >> >> >> I'm really trying to learn about all aspects of Squeak, but at the moment >> I have a task where I need to query a relational database and output an XML >> representation of a subset of the data. This needs to be invoked from a cron >> job, so if I can run my Smalltalk code from a terminal window then I'll be >> set. I know I could do this using many other languages such as Java or Ruby. >> However, since I'm trying to learn Smalltalk and Squeak at the moment, I >> thought I'd use those as part of the learning process. >> >> --- >> Mark Volkmann >> >> >> >> >> >> _______________________________________________ >> Beginners mailing list >> Beginners(a)lists.squeakfoundation.org >> http://lists.squeakfoundation.org/mailman/listinfo/beginners >> > > > > _______________________________________________ > Beginners mailing list > Beginners(a)lists.squeakfoundation.org > http://lists.squeakfoundation.org/mailman/listinfo/beginners > >

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scripts
by Mark Volkmann 26 Sep '08

26 Sep '08

Is it possible to run a Squeak program from a terminal window and have access to the stdin and stdout streams from the Smalltalk code? If so, pointers to documentation on this would be much appreciated. --- Mark Volkmann

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Re: [Newbies] scripts
by Marcin Tustin 26 Sep '08

26 Sep '08

Probably worth mentioning that GNU Smalltalk targets that kind of application. I don't use it, so I can't tell you how nice it is (except that when I tried it, there wasn't a working gui, so I went away). On 9/26/08, Randal L. Schwartz <merlyn(a)stonehenge.com> wrote: > > >>>>> "Bert" == Bert Freudenberg <bert(a)freudenbergs.de> writes: > > Bert> Am 26.09.2008 um 05:12 schrieb Mark Volkmann: > > >> Is it possible to run a Squeak program from a terminal window and have > >> access to the stdin and stdout streams from the Smalltalk code? > > Bert> Yes. > > >> If so, pointers to documentation on this would be much appreciated. > > > Bert> http://wiki.squeak.org/squeak/708 > > That's for Squeak creating child processes. I *think* the question > is more along the lines of: > > http://wiki.squeak.org/squeak/425 > > as in, "how can I run Squeak from a command line, and get access > to the command-line arguments?" > > The longer answer is that we generally *don't* do that, so there's not a > lot > of discussion or support for it, but there it is. > > -- > Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095 > <merlyn(a)stonehenge.com> <URL:http://www.stonehenge.com/merlyn/> > Smalltalk/Perl/Unix consulting, Technical writing, Comedy, etc. etc. > See http://methodsandmessages.vox.com/ for Smalltalk and Seaside > discussion > _______________________________________________ > Beginners mailing list > Beginners(a)lists.squeakfoundation.org > http://lists.squeakfoundation.org/mailman/listinfo/beginners >

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exception handling
by Mark Volkmann 26 Sep '08

26 Sep '08

Can someone point me to an example of how to raise and handle exceptions in Squeak Smalltalk? My Googling came up empty. --- Mark Volkmann

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Beginners September 2008