squeakland March 2005

squeakland@lists.squeakfoundation.org

24 participants
32 discussions

Does the squeakland swiki still exist?
by dgraftery＠verizon.net 06 Apr '05

06 Apr '05

With all the informative posts, recently, I was wondering if Squeakland has a Swiki, where members can post followups or store useful content for all users. Something similar to the squeak developers swiki. We could also use a squakland swiki as a place to collectively write tutorials and provide hints. Is this possible to implement? Thanks, Dave

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Check out the "Project of the Month"!
by Kim Rose 04 Apr '05

04 Apr '05

Hi, folks - We've just added a new feature to the Squeakland website. We call it "Etoy project of the month". Each month we'll feature a new etoy project, along with documentation on how to create it. We will feature projects from *you* -- so please share! If you have a project you, or your students have created, please send it -- along with a narrative on how and why it was created, i.e., the concepts it adresses, to projects(a)squeakland.org. We hope to build a great collection of projects for all to share. Kim

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Possible EToys bug?
by Jerry Bell 01 Apr '05

01 Apr '05

Hi, I created a simple sorting demo in EToys for a presentation. After building and implementing the first demo I created a copy of the Holder. This is a deep copy, not a sibling- the idea is to implement another sorting algorithm in the copy by changing its existing scripts, and then run it side by side with the original version. The bug I'm running into involves adding a new script to the new copy of the Holder. The "Holder1 startScript emptyScript" tile will not list my new script, until I go back and add a new script with the same name to the original Holder. I'm pretty sure that is not the desired behavior but I haven't been able to dig deep enough into the underlying code to find the problem. It appears to be looking back to the original copy to find the list of scripts which are available, when it should be looking at the scripts in the copy. The work-around is easy enough- add an empty script to the original Holder named the same as my new script- but if anyone has a fix, or can point me towards the general code I should be looking at, I would appreciate it. Thanks! Jerry Bell

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project of the month
by dgraftery＠verizon.net 31 Mar '05

31 Mar '05

The Go Fish project is wonderful. Let's keep them coming ! I found one problem with Go Fish working my way through it last nite. The third bullet under Fish and Animation tells you to drag the two (or more) fish objects to the holder. This is incorrect; the animation won't appear if you do this. It should read something like: "using the green halo, make a duplicate of the fish. Keep this fish object on the world and drag the other 2 (or more) fish objects into the holder". Also in the next paragraph, "Holder's playerAtCursor" is not found in the 'playfield' category. It is found in the 'collections' category. Regards, Dave

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Re: [Squeakland] Recursion supported in etoys script ?
by Scott Wallace 30 Mar '05

30 Mar '05

Hi, all. A question arose recently on the Squeak-dev mailing list (a list mostly inhabited by software engineers) concerning "recursion in etoys." I wrote a reply, which I'm herewith forwarding to the Squeakland list, on the chance that this information might be useful to some readers. BTW my reply was suppressed by the moderators of the Squeak-dev list, who said it was too large, so it never did actually appear on that list ;-) -- Scott ------------------------------------------------------------------------------------ Hi, Kevin, Yes, etoys do support recursion. But they don't have a good way of detecting and recovering from *runaway* recursion, which is what was befalling your script. Here's a recursive etoy script which does what you want, and which *does* converge, provided that there is a patch of the appropriate blue somewhere ahead of the Star: Two points to note here: (1) The critical difference between this and what you did is that after the *copy* is made, this script "includes" that copy in the container. Without the "include," the copy isn't present in the "world", so neither it nor any future generation of "copy" will be "over blue" and hence terminate the recursion. That's why your recursion ran away. (2) In the last line, it's *okay* simply to have "Star's nextGuy approachBlue". The value of the "do" inserted here is that this defers the recursive #approachBlue script call until the next cycle of the simulation. The result will be there will be a sense of "movement" since each generation will be born on a different tick, whereas without the "do" all the generations will be born within the same "tick" so all will appear instantaneously -- a much less nice effect. Cheers, Scott PS: Please check out Squeakland.org, and you may well want to subscribe to the Squeakland mailing list: http://www.squeakland.org/mailman/listinfo/squeakland At 10:08 AM -0800 3/25/05, Kevin Lawrence wrote: >Is it appropriate to post questions about etoys to this list ? > >[I'll risk it this time - let me know if there is somewhere else I >should be asking, thanks.] > > >I tried making a simple etoys script with recursion and it hangs as >soon as I click the run icon. > >the script was essentially (excuse my Java-ish pseudocode) ... > > >spawn script > test self.sees blue > > yes > > no > self.newCopy = self.copy > self.newCopy.forwardBy self.length > self.newCopy.spawn > > >Assuming I haven't made a really silly *mistake, should this work ? > >Is recursion supported ? > >(I searched the bug database but couldn't find anything) > > >Thanks ! > >Kevin > >* Please tell me if there is a silly mistake !

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project of the month
by mike re-v 30 Mar '05

30 Mar '05

kim project of the month is a great idea. if you really want to see this take off include the national teaching standards and lesson plans the idea addresses for the phb. thanks re-v __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/

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Loading projects into local websites
by Jennifer Voorhees 30 Mar '05

30 Mar '05

My students have created some great projects they'd like to share with the school community. How do I upload a Squeak project into onto a website? Thanks for the help. Jenni Voorhees Jenni Swanson Voorhees Lower School Technology Coordinator Sidwell Friends School 202-537-6994 voorheesj(a)sidwell.edu

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Megaconf Jr; collaborative Squeaking?
by Randy Heiland 29 Mar '05

29 Mar '05

I've been tagged to head up our (Indiana Univ) role in this upcoming conference: http://megaconferencejr.org/ and thought I'd (1) notify both the Squeak and Croquet user communities of this event and (2) ask if anyone is interested in experimenting with me, and/or others, on collaborative uses. Timing is tight as the presenter proposals deadline is April 15 and the actual conf May 19. Related - I'd like to educate myself on the 'Collaborative' tools in Squeak/Etoys and would welcome pointers to how-tos, etc. Thanks, --Randy

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Kedama question
by Jerry Bell 28 Mar '05

28 Mar '05

Hi, I've been playing with Kedama a little and it is really great! I have a few questions: In the Kedama GasTank example it looks like the ceiling was created by running the oneStep script. In the Diffusion example, was the wall created in the same way? I saw how to drop a sketch to fill the Kedama world with turtles. It looks like all of the turtles are instances of a single exemplar turtle. Is it possible to get an exemplar turtle for each color in the sketch? This would make it easy to set up specific starting conditions(ie boxes, lines, etc) and let you assign different behavior to instances of each color turtle. You could drop a sketch in Kedama, get exemplar turtles for each color in the sketch, and tell all of the instance turtles of the sketch background color to die off. Or is there a better way to do this? Thanks, Jerry Bell

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Lego Mindstorms and Squeak
by Mark Kesling 25 Mar '05

25 Mar '05

We are having great success using Squeak as a four week introduction to the use of Lego Mindstorms with our 4th graders. It seems that Squeak allows children to construct simpler models and learn the concepts required for creating the logic necessary when using the Legos. We have worked with Legos for years but found that the introduction through Squeak, especially The Great Car Race, has moved the process of understanding way ahead of our past group experiences. Has anyone else been working with Legos and Squeak? Mark

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squeakland March 2005