Comments on: Teaching recursion with Scratch BYOB http://www.nutt.net/2010/03/06/teaching-recursion-with-scratch-byob/ Random articles on whatever I feel like... Tue, 07 Feb 2012 22:30:43 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Teaching recursion with Scratch BYOB – take 2 | Nutt.net http://www.nutt.net/2010/03/06/teaching-recursion-with-scratch-byob/comment-page-1/#comment-164093 Teaching recursion with Scratch BYOB – take 2 | Nutt.net Sat, 08 Oct 2011 14:35:07 +0000 http://www.nutt.net/?p=487#comment-164093 [...] is a follow up from a post I did about a year and a half ago on using Scratch BYOB to teach recursion. The original way of defining parameters in BYOB were a bit clunky, but it’s gotten much [...] [...] is a follow up from a post I did about a year and a half ago on using Scratch BYOB to teach recursion. The original way of defining parameters in BYOB were a bit clunky, but it’s gotten much [...]

]]> By: Ryan http://www.nutt.net/2010/03/06/teaching-recursion-with-scratch-byob/comment-page-1/#comment-137111 Ryan Mon, 28 Mar 2011 23:20:32 +0000 http://www.nutt.net/?p=487#comment-137111 Checked this morning. The version we used in class this year is 3.03 which has a small box out to the side of the block editor to create local variables. I downloaded the new version of BYOB last night, but didn't get a chance to try the script variable idea. Checked this morning. The version we used in class this year is 3.03 which has a small box out to the side of the block editor to create local variables. I downloaded the new version of BYOB last night, but didn’t get a chance to try the script variable idea.

]]> By: Randy http://www.nutt.net/2010/03/06/teaching-recursion-with-scratch-byob/comment-page-1/#comment-137059 Randy Mon, 28 Mar 2011 13:23:30 +0000 http://www.nutt.net/?p=487#comment-137059 Thanks for checking, I'll try to find a place to ask at the byob site. They have something called a script variable...but this test doesn't seem to work the way I think it should - make a regular variable x, set it to 0. make a block Test with a script variable x, set it to 10. I think both variables are changed to 10, rather than just the variable local to Test block. Let me know if you find out something. Thanks for your Sierpinski program. We're teaching Scratch and maybe byob to elementary school kids in a school in Fairfax county Va. Thanks for checking, I’ll try to find a place to ask at the byob site.
They have something called a script variable…but this test doesn’t seem to work the way I think it should -
make a regular variable x, set it to 0.
make a block Test with a script variable x, set it to 10.
I think both variables are changed to 10, rather than just the variable local to Test block.
Let me know if you find out something.
Thanks for your Sierpinski program. We’re teaching Scratch and maybe byob to elementary school kids in a school in Fairfax county Va.

]]> By: Ryan http://www.nutt.net/2010/03/06/teaching-recursion-with-scratch-byob/comment-page-1/#comment-136810 Ryan Sat, 26 Mar 2011 13:46:36 +0000 http://www.nutt.net/?p=487#comment-136810 This is actually from an older version of BYOB. Don't remember what version it was we used in class, but the process of making parameters was much easier than what's here. Can't seem to get to the BYOB site right now to try out whatever the current version is. This is actually from an older version of BYOB. Don’t remember what version it was we used in class, but the process of making parameters was much easier than what’s here.

Can’t seem to get to the BYOB site right now to try out whatever the current version is.

]]> By: Randy http://www.nutt.net/2010/03/06/teaching-recursion-with-scratch-byob/comment-page-1/#comment-136808 Randy Sat, 26 Mar 2011 13:24:14 +0000 http://www.nutt.net/?p=487#comment-136808 I had trouble getting your code to work, but it works now. THe problem I have is with the 'local' block variables. Mine aren't working as local variables (midx1, midy1, etc), apparently they're having a global effect, which throws off the drawing. I just substituted the expression for each into the recursive call, skipped using the local variable names. THis works now. How do you create local variables? My version of byob (windows) doesn't have the 'block variable' creator? Thanks I had trouble getting your code to work, but it works now. THe problem I have is with the ‘local’ block variables. Mine aren’t working as local variables (midx1, midy1, etc), apparently they’re having a global effect, which throws off the drawing.
I just substituted the expression for each into the recursive call, skipped using the local variable names. THis works now.
How do you create local variables? My version of byob (windows) doesn’t have the ‘block variable’ creator?
Thanks

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