cells-devel

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567 discussions

[cells-devel] PLT-Scheme cells?
by Stefano Dissegna 04 Sep '08

04 Sep '08

I didn't actually tried this, but it looks very similar to cells. What do you think? http://docs.plt-scheme.org/frtime/index.html

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[cells-devel] bug report w/patch for record-caller in link.lisp, in LWL 5.1
by Larry Clapp 01 Sep '08

01 Sep '08

Bug report: Running Stefano's Sudoku example from his cells-doc in Lispworks for Linux 5.1, got an error in record-caller: Error: The subscript 16 exceeds the limit 15 for the first dimension of the array #*1111111111111111. 1 (abort) Return to level 0. 2 Return to top loop level 0. Lispworks said the offending code was at the indicated line: (handler-case (setf (sbit (cd-usage *depender*) used-pos) 1) ; <== ### here ### (type-error (error) (declare (ignorable error)) (setf (cd-usage *depender*) (adjust-array (cd-usage *depender*) (+ used-pos 16) :initial-element 0)) (setf (sbit (cd-usage *depender*) used-pos) 1)))) Fix: The condition reported was of type CONDITIONS:SUBSCRIPT-OUT-OF-BOUNDS. I added that to the handler-case, and then it worked: (handler-case (setf (sbit (cd-usage *depender*) used-pos) 1) ((or type-error conditions:subscript-out-of-bounds) (error) ;^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (declare (ignorable error)) (setf (cd-usage *depender*) (adjust-array (cd-usage *depender*) (+ used-pos 16) :initial-element 0)) (setf (sbit (cd-usage *depender*) used-pos) 1)))) However, this seems like a demonstrably error-prone way to handle this particular situation, so I got rid of the handler-case entirely and tried this: (let ((cd-usage (cd-usage *depender*))) (when (>= used-pos (array-dimension cd-usage 0)) (setf cd-usage (setf (cd-usage *depender*) (adjust-array (cd-usage *depender*) (+ used-pos 16) :initial-element 0)))) (setf (sbit cd-usage used-pos) 1)) It works, doesn't depend on implementation-specific conditions, and in my limited testing (I ran the sudoku solver three times using each version), seems at least as fast, if not a tiny bit faster. -- Larry

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[cells-devel] laziness -- what does "once-asked" mean?
by Larry Clapp 29 Aug '08

29 Aug '08

I understand (I think ...) what :once-asked *does*, I want to know what it *means*. In other words, the other two options seem to answer the question "when is this cell lazy?" Well, an :always cell is always lazy -- it's not recalculated until and unless you ask for it. An :until-asked cell is lazy until you query it once, then it's non-lazy from then on. "once-asked" seems to answer a *different* question, "when is this cell evaluated?" It's evaluated once, when created, and then only when queried. Is there any single "question" that all three answer, or are they just inconsistent? Thanks! -- L

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[cells-devel] What's a cells-store?
by Stefano Dissegna 27 Aug '08

27 Aug '08

Reading cells source files, I noticed cells-store. I think it has something to do with hash tables, but nothing beside this. What's its purpose? How is a cells-store normally used? Thanks in advance for an answer.

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Fwd: [cells-devel] Need help getting Mac version of my Algebra software
by Frank Goenninger 18 Aug '08

18 Aug '08

Reposting to the list ... Anfang der weitergeleiteten E-Mail: > Von: Frank Goenninger <frgo(a)me.com> > Datum: 18. August 2008 08:52:56 MESZ > An: Kenny Tilton <kennytilton(a)optonline.net> > Kopie: cells-devel <cells-devel(a)common-lisp.net> > Betreff: Re: [cells-devel] Need help getting Mac version of my > Algebra software > > Kenny, all: > > Am 16.08.2008 um 01:35 schrieb Kenny Tilton: > >> Windows searches first the app directory, then the PATH values, >> then /windows/system32. The cool thing is I can just lob all my >> DLLs into the app folder and not worry about (a) conflicts or (b) >> learning how to use an installer (not that that would be the end of >> the world). >> >> Does the Mac have a similar search sequence? I heard on the wiki it >> was customary for Mac apps to just "install" by copying a directory. >> >> GM is a mystery, and their list was silent. One theory was about >> COM registration, even tho I am using FFI. Anyway, perhaps on the >> Mac if we /can/ just toss dylibs in the app directory it will work >> on the Mac where it did not on Windows. >> >> Thx again, kt > > On the Mac, things are a bit different. I'd first restate the > requirements from the above paragraph: > > 1. Install all libs in the app's folder in order to have full > control over the libs being loaded. > 2. Get the app to find the libs in that folder. > > Mac OS X's idea of an application is really a folder named App.app > (notice the suffix "app"). In that ".app" folder we have: > > /Contents/ ("/" denoting a directory) > > and within the Contents folder the following structure: > > /Info.plist > /MacOS/ > /Library > /MacOS > /Resources > > While not going into too much detail here (see below how to make a > suitable ".app" folder structure) I would advice to package up GM > into the /Library folder. This folder holds "foreign" libs. Same for > Tcl/Tk. > > So, how to build that ".app" folder: > > On Mac OS X there's a "Developer" folder right at the root directory > of the internal disk if you have selected to install the developer > tools (like Xcode etc.). > > In folder /Developer/Applications/Utilities there's a tool called > "PackageMaker". After having build your source folder tree like > > .../StuckOnAlgebra/ > > as the root dir and then below that > > /Library/TclTk8.5 > /Library/GraphicsMagic > /bin/stuckonalgebra (the "exe") > /... whatever files else needed for the app > > you may use the PackageMaker to build the package via drag-and-drop > and customizing the install process. > > In PackageMaker you want to select the options such that the install > process is installing SoA in /Applications. This ensures that you > can rely on the Library path to be "/Applications/StuckOnAlgebra.app/ > Library/". > > Then, in Cello and in Celtk, you have to adapt the load paths > accordingly. > > That should do it. You may want to automate that process when > building stuff over and over again. It then may be required to use > Xcode or a shell script to make this automated. 2 days work to get > everything stable... > > Complex? No ;-) Just Different. > > I could make a first package if you want me to... > > Cheers, > Frank > > > >

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Re: [cells-devel] Cells tutorial
by Stefano Dissegna 18 Aug '08

18 Aug '08

2008/8/17 Kenny Tilton <kennytilton(a)optonline.net> > Stefano Dissegna wrote: > > >> >> 2008/8/17 Kenny Tilton <kennytilton(a)optonline.net <mailto: >> kennytilton(a)optonline.net>> >> >> >> >> Glad to, but can you convert them to something I can read on a >> windows box? >> >> kt >> >> >> >> I've added the pdf version (fonts are quite ugly, though) and a txt >> version (both unix and windows end-of-line). >> > > Looks pretty solid. I do have some suggestions, will send later. Have you > read cells-manifesto.txt, btw? > > kt > Thanks for the suggestions, later I'll read them and fix the tutorial. I will also keep extending it as I get to know more about cells. I've had just a quick look at the cells manifesto, I'll read it more thoroughly today.

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Re: [cells-devel] Cells tutorial
by Stefano Dissegna 17 Aug '08

17 Aug '08

2008/8/17 Kenny Tilton <kennytilton(a)optonline.net> > > Glad to, but can you convert them to something I can read on a windows box? > > kt > I've added the pdf version (fonts are quite ugly, though) and a txt version (both unix and windows end-of-line).

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[cells-devel] Cells tutorial
by Stefano Dissegna 17 Aug '08

17 Aug '08

Hi! I'm a cells newbie, and while learning it I'm writing a tutorial. It's certainly full of errors, so I would highly appreciate if you could have a look at it and tell what do you think. You can find it here: http://github.com/stefano/cells-doc/tree/master At the moment there are two files: the Lyx source and a dvi file generated by Lyx/LaTex.

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[cells-devel] Need help getting Mac version of my Algebra software
by Kenny Tilton 15 Aug '08

15 Aug '08

Bill Clementson has kindly volunteered to take a look at making a build of my Algebra program for Mac OS X. I have already dragged the code over and it Just Compiles (doesn't hurt that we are using ACL on both OSes). Yeah. So with luck we just need shared libs and fine-tuning of any CFFI calls referencing same. Right now I am stuck, btw, can't find a way around actually running the GraphicsMagick installer -- I'd rather just do what I do in the Windows version: just throw all the libs into the application directory. Not sure if the Mac works that way. I am tempted to just beg borrow steal the libs in binary form -- bad idea? I imagine Tcl/Tk/Togl can be installed from ActiveState and then move their libs into the app directory (if that bit is even the same)... well, any ideas/thoughts/advice on this issue are welcome. cheers, kenny ps. Heard from my first interested customer, a school in Missouri. They need a Mac version. I knew I was going to do one, but I am reminded again at how much more interesting Mac users are. (Saw this last time I sold the app.) k

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[cells-devel] the cells way
by Andy Chambers 13 Aug '08

13 Aug '08

Hey, In openair, I'm getting problems with dead instances. I think its maybe because I'm working against cells. What I need to do is keep track somewhere of all the nodes that change in response to a request. Currently, this is done using an "update" slot which we setf on an xhtml observer. (defobserver xhtml ((self html)) (when (and new-value (do-send self new-value old-value)) (trc "new xhtml" new-value) (setf (update self) (format nil "$(\"#~a\").replaceWith(\"~a\")" (md-name self) (js-escape new-value))))) When a new request comes in, we do the following: - walk the family tree, setting the update slot to nil. - feed the request parameters into the model - walk the family tree looking for places where update is not nil and sending it to the browser In some cases, that works fine but in others, we find dead cells while walking the tree the first time. Another point to note is that the update slot is specified as :cell nil. Based on its purpose and usage, does that make sense? Should I be wrapping this traversal in with-integrity or something? Cheers, Andy

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