Beginners August 2007

beginners@lists.squeakfoundation.org

66 participants
62 discussions

Prompter Class
by phiroc＠free.fr 22 Aug '07

22 Aug '07

Hello, I am currently going through the Dispatcher Tutorial in Dan Shafer and Dean A. Ritz's "Practical SmallTalk". On page 32, they suggest creating a Prompter in a Workspace, as follows: | anotherItem | anotherItem := Prompter prompt: 'Something to prioritize? ' default: '' . ^ anotherItem The only problem is that the Prompter Class does not exist in Squeak or bears a different name. Could someone please tell me what Squeak's equivalent to the Smalltalk/V Prompter class is? Here's the authors' definition of the Smalltalk/V Prompter Class: "A Smalltalk/V Prompter is a small window with one TextPane that poses a question to the user in its top line, or header area, and allows the user to type in an answer in the bottom". Many thanks. phiroc

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Tutorial status
by Steve Wessels 21 Aug '07

21 Aug '07

I've been on vacation and just yesterday, Thursday, began to process email messages and resuming work on my Squeak Tutorial. Many folks have written to me, personally and here publicly, with both feedback, comments, corrections and questions. I want to take a moment and update my status on the tutorial work. First of all, thank you goes to everyone who has written me with positive feedback. Thank you for your validation of my efforts. A few people have asked for a Zip file of the tutorial contents. At this time I have no plans to make this available. As a regular component of my publication process I in-fact make a Zip file backup of the entire tutorial each time I update the web site. However, the file is huge. It's not something that can be emailed and I have not been uploading the file to the web site because of its size. I would like to make PDFs and will investigate that in the future. My current activities are focused around fixing reported and self-discovered typos, and I am doing a complete walk through from scratch as if I were an interested student. In this way I am finding errors and omissions. I am currently in section 3. This takes as long, perhaps longer, than it took to actually write the tutorial. After the coming update(s), I still have more to write. So even though the tutorial in its present firm is highly useful, as many of you have told me, the work itself is not done. Furthermore I have an ambition to publish the tutorial as a book some day and will begin work on that in earnest when this next set of activities has completed. - Steve ____________________________________________________________________________________ Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more. http://mobile.yahoo.com/go?refer=1GNXIC

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XML Post
by Nick Ager 19 Aug '07

19 Aug '07

Hi, I'm trying to perform an HTTP-POST an XML document to a server. I tried using HTTPSocket httpPostDocument:args:accept:request: However I'd like 'Content-type' to be set to 'text/xml' in the post header and the implementation of httpPostDocument:args:accept:request: contains: 'Content-type: application/x-www-form-urlencoded', CrLf, I've hacked my own version, but I feel I'm missing something. Is there a better way to do this in Squeak/Seaside. My image is based on: http://damien.cassou.free.fr/squeak-dev/beta/sq3.10-7137dev07.08.1.zip Thanks in advance, Nick

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Re:
by Edgar J. De Cleene 17 Aug '07

17 Aug '07

El 8/16/07 6:06 PM, "pascal.vollmer(a)nexgo.de" <pascal.vollmer(a)nexgo.de> escribió: > Hello, > > Two questions: > > A.) I've tried to submit a question to Beginners mailing list but I did not > succeed. I have subscribed to the Beginners list but despite this I get the > following answer: > > ---snip--- > > Your mail to 'Beginners' with the subject > > Lines of code metrics for class category > > Is being held until the list moderator can review it for approval. > > The reason it is being held: > > Post by non-member to a members-only list > > Either the message will get posted to the list, or you will receive > notification of the moderator's decision. If you would like to cancel > this posting, please visit the following URL: > > > http://lists.squeakfoundation.org/mailman/confirm/beginners/9c414638c0e2a71… > af95315427afcd049603f7 > > ---snip--- > > So, what is wrong here. Did I miss something ? Sure some is wrong with the list. If you wish could join to our http://ar.groups.yahoo.com/group/squeakRos/ (Group) Is mostly Spanish, but we have many who understand English too and could help you > B.) I would like to use an accounting scheme for the Lines of Code (LOC) I > add/delete/modify/reuse from one release of my project to another. In order to > do this I would need two things: > 1. be able to have two versions of the same class category coexistent in the > same image (my release from 1st of march versus the later release from 1st of > april) You can't have two versions of same class in the image. Or not to this time, this could change in view of some recent ideas and discussions > 2. be able to "diff" those two versions and to determine You could use actual .cs fileouts and have as many versions you like saved to disk. Via File Contents browser you could see and apply diff to classes and methods. > 2.1 number of added LOC > 2.2 N of deleted LOC > 2.3 N of modified LOC > 2.4 N of reused LOC (coming from another place, not written by myself) > I am aware of the nice diff feature which is available for methods. But I did > not find a similar thing for an entire class or class category. > (Background: I would like to compute these metrics in order to apply the > "Personal Software Process". See: Watts S. Humphrey: A Discipline for Software > Engineering, Addison-Wesley, 1995) As your programming skills improve, your methods become shorter. So best programmer have few LOC for same thing The LOC concept is of no use in Smalltalk, but sure exist how to have it. > Kind regards > Pascal > > Pascal Vollmer > Email: pascal.vollmer(a)ieee.org I emailing you and the list, I hope your problem and maybe same of others could be fixed. Cheers. Edgar

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Where is my favorie mouse for the 3.9 and 3.10 images?
by Thomas Porter 17 Aug '07

17 Aug '07

Hello, The last time I looked at Squeak it was at 3.6 or 3.7. IIRC the full image had the wonderful and charming SqueakLogo morph with roving eyes. Alas, my favorite mouse seems to have disappeared. Is there a package that I can load to get him or her back? Tom Porter

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Squeak / smalltalk beginners books
by Russ 16 Aug '07

16 Aug '07

There is a dearth of smalltalk or squeak books at most of the bookstores my area - Seattle - this is down from minuscule in the past few years. I am a permanent beginner when it comes to programming or rather an amateur. I do sometimes get more instructional value out of a book than wading through lines of source code - though I understand that this is one of smalltalk's strongest points: its self documenting ability. And so at the bookstores (Borders, Elliott Bay...) I see scores of book on PHP, Ruby, Ruby on the Rails, Python, even Lua, as well as the usual suspects, java, javascript, Visual Basic and C/C++/C#. No smalltalk,no squeak. There used to at least be token representation. So I ask, where are the Squeak for Dummies, or some animal covered smalltalk books published by O'Reilly. This is really to the long-term detriment to the vitality of the language. -Russ

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Remove Window Gradients
by Michael Hogsett 16 Aug '07

16 Aug '07

Hi I am new to Squeak and have been working through several tutorials on Smalltalk and Squeak but have not found an answer for this (I've googled for an answer but I didn't find one for this). I'd like to remove the right to left color to white gradients from my windows within Squeak by default. How do I do that? I can see that I can remove the gradients from the menus, but I can't find a setting in the preferences for removing them from windows. Thanks! - Mike

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Re: [Newbies] Ubuntu Linux
by Richard Eng 15 Aug '07

15 Aug '07

Finally, a reasonable answer! This works. No one thought to document this somewhere obvious? Like in a README or on the Ubuntu forum? Thanks, Bert. Regards, Richard --------------------------- Bert Freudenberg wrote: After unpacking the tarball, just rename i686-pc-linux-gnu to i686-pc- linux-gnulibc1 before installing. Apparently Ubuntu uses a non- canonical system designation, which confuses the installer. - Bert -

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test for exception
by John Almberg 14 Aug '07

14 Aug '07

I have a setter method that tests input for validity using 'assert'. It looks like this: aVariableName: aNumber self assert: [(aNumber >= self minValue) & (aNumber <= self maxValue)] description: 'invalid value'. aVariableName := aNumber. The program needs to blow up if an invalid number is assigned. I don't want to just quietly ignore the invalid assignment. That's why I have this assertion. Anyway, the assertion blows up just fine, but now I'd like to write a test that checks to see what happens if I try to assign an invalid number. I *think* I should use something like: self should: [anObject aVariableName = anInvalidNumber] raise: ??? raise: is supposed to get the ExceptionEvent, but I'm not sure how to find out which event this would be. The debugger doesn't seem to show this when the assertion fails. How do I know which exception event is raised? Or am I on the wrong track completely? Thanks: John

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Squeak plugin Firefox/Ubuntu
by Sam Christie 14 Aug '07

14 Aug '07

I wonder if someone could help me on this one. I am running Ubuntu (feisty) and have installed using Synaptic Package Manager the following packages. squeak squeak image squeak sources squeak vm I can run squeak locally on my machine - no problem. However, when I try to run Squeaklets in Firefox , I am prompted to install a plug-in. This then takes me to the Squeakland website. Here I am prompted to download and install a package that I already have. I have tried installing this in any case but it does not help. I have seen from the mailing list that npsqueakregister is the script to run to register the plug-in with Firefox. I have done this and while the script run happily (see below) I am still presented with the same error. sam@sam-t43:/usr/lib/squeak$ sudo ./npsqueakregister Registering /usr/lib/mozilla/plugins/npsqueak.so create symbolic link `/usr/lib/mozilla/plugins/npsqueak.so' to `/usr/lib/squeak/3.7-7/npsqueak.so' Thanks, Sam -- Sam Christie The Shuttleworth Foundation tel: +27 21 970 1214 | fax: +27 21 970 1215 www.shuttleworthfoundation.org Email disclaimer: http://tinyurl.com/yqwe9z

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Beginners August 2007