Beginners May 2015

beginners@lists.squeakfoundation.org

13 participants
7 discussions

How to Double Squeak?
by Kirk Fraser 26 May '15

26 May '15

I want to run 2 Squeaks on a 2 core computer. The first time I tried two instances, one complained that it couldn't save changes or something but ran anyway, enabling me to open both the internal webcam and a USB webcam at the same time and enjoy the same display speed on each. To avoid the file conflict I later copied the entire Squeak directory to a copy to run separately. I brought up the Task Manager to set the priorities high and affinity to each core separately. Oddly the task manager showed two Squeak.exe's but only one had a description Squeak Cog Virtual Machine. They both started but soon one gave a VM error message and quit. What is the correct way to run a Squeak on each core? I've seen a recommendation to use 4 cores for machine vision and i hope to do it in Squeak instead of C++ to better modify the perception code. Thanks.

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Is the "Blue Book" still useful?
by Daniel Roe 25 May '15

25 May '15

Thanks to all for the answers. As I proceed I'm sure to have more questions. Dan

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Is the "Blue Book" still useful?
by Daniel Roe 23 May '15

23 May '15

I have a copy of the Smalltalk-80 "Blue Book"by Goldberg and Robson. I am a complete noob when it comes to Smalltalk but would like to learn about it by using Squeak. Aside from some notational differences, that I can adjust to, is the "Blue Book" still useful in any way? Thanks for your time, Dan

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Cyrilic fonts in Squeak
by Ariel Feinerman 22 May '15

22 May '15

Hi all, does anyone know how to allow cyrillic and other languages in Squeak 4.5? -- Best regards, Ariel

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Feedback: Using Output as the Next Input
by Dan 03 May '15

03 May '15

Howdy, A class is instantiated and produces output in a data structure (array, collection, dictionary, ...). Upon each later (maybe months later) instantiation, the previous output is needed as input. What is the best way to do this for modest (not huge) output? Some possibilities: Externally - file out and file in Within the class - compile class methods containing the output; save with Montecello I'm interested in how to dynamically compile a class method. Can Browser be invoked dynamically? In studying Browser and friends, it looks complicated. Am I missing something or attempting something foolish or ...? - Dan

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Update Timer?
by Kirk Fraser 03 May '15

03 May '15

I am building a simple database using a tree and a ReferenceStream as learned here. I want it to update the disk file every 10 min. with the current tree. What should I do? The classes Time, Duration, Stopwatch, Schedule, look like possibilities but the only method that looks good is Schedule "between: aStart and: anEnd do: aBlock" but I don't want it to hang waiting on the timer so the tree can't take my changes. How do I make something perform like a text editor that saves its work every 10 min? Thanks, Kirk Fraser

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Re: [Newbies] Feedback: Using Output as the Next Input
by Dan 01 May '15

01 May '15

On 5 Dec 2014 at 1:13, Bert Freudenberg wrote: > > > On 05.12.2014, at 00:49, Dan <dnorton(a)mindspring.com> wrote: > > > > On 4 Dec 2014 at 23:22, Bert Freudenberg wrote: > > > >> > >>> On 04.12.2014, at 23:14, Dan <dnorton(a)mindspring.com> wrote: > >>> > >>> Howdy, > >>> > >>> A class is instantiated and produces output in a data > structure > >> (array, collection, dictionary, > >>> ...). Upon each later (maybe months later) instantiation, the > >> previous output is needed as > >>> input. What is the best way to do this for modest (not huge) > >> output? Some possibilities: > >>> Externally - file out and file in > >>> Within the class - compile class methods containing the > output; > >> save with Montecello > >>> > >>> I'm interested in how to dynamically compile a class method. > Can > >> Browser be invoked > >>> dynamically? In studying Browser and friends, it looks > >> complicated. Am I missing something > >>> or attempting something foolish or ...? > >> > >> Why wouldn't you just keep the "output" in the image and save > it? > >> When you restart it months later, it will be there. > >> > >> - Bert - > >> > > That surely is simpler than trying to compile a method. > > Not that compiling a method is hard. > That is encouraging. Is it something similar to "Dynamic Message Calling" described in the Terse Guide to Squeak? > > I might put something like this in a package. > > I'm not sure what you mean by that. > I mean a package on SqueakMap where one can download it and try it out. I see there are over 700 packages out there for the choosing. A great variety. It's unfortunate that not all run on the current release of Squeak but maybe with a little work... ;) > > Would users find saving the image as... to be the expected way of > doing things? > > > > - Dan > > Depends on who your users are. If you were the user ... you're > saving your image all the time, right? > Um, not exactly. But more often than in the past. I feel most comfortable saving with Montecello. > Maybe you should be more specific in what data you want to store, > how you want to distribute it, and who is going to use it. > I have in mind a list of names which are matched randomly in pairs then filtered according to a set of rules. The output is a dictionary and the rules specify that no pair can be the same as previous (up to 3) instances. There are other rules and often hundreds of iterations take place before all pairs obey all the rules. It might be used, as it is in our family, to draw names for Christmas. The person who runs the program distributes the results to those on the list. - Dan

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Beginners May 2015