Cells - A dataflow extension to CLOS | Hacker News Reader

Cells - A dataflow extension to CLOS

common-lisp.net

33 pointsjefffoster13 comments

Looks cool, I tried to install it under ubuntu and got the error (SB-KERNEL:ASSERT-ERROR (STRING-EQUAL ASDF-INSTALL::URL "http:// :END1 7)

Full procedure if anyone's interested is:

sudo apt-get install sbcl sbcl-asdf

$ rlwrap sbcl This is SBCL 1.0.29.11.debian, an implementation of ANSI Common Lisp. More information about SBCL is available at <http://www.sbcl.org/>.

SBCL is free software, provided as is, with absolutely no warranty. It is mostly in the public domain; some portions are provided under BSD-style licenses. See the CREDITS and COPYING files in the distribution for more information. * (require 'asdf)

NIL * (require 'asdf-install)

; loading system definition from ; /usr/lib/sbcl/sb-bsd-sockets/sb-bsd-sockets.asd into #<PACKAGE "ASDF0"> ; registering #<SYSTEM SB-BSD-SOCKETS {AD248A1}> as SB-BSD-SOCKETS ; registering #<SYSTEM SB-BSD-SOCKETS-TESTS {AE975D9}> as SB-BSD-SOCKETS-TESTS ("SB-BSD-SOCKETS" "ASDF-INSTALL") * (asdf-install:install :cells) Install where? 1) System-wide install: System in /usr/lib/sbcl/site-systems/ Files in /usr/lib/sbcl/site/ 2) Personal installation: System in /home/john/.sbcl/systems/ Files in /home/john/.sbcl/site/ --> 2

debugger invoked on a SIMPLE-ERROR in thread #<THREAD "initial thread" RUNNING {AA5E589}>: The assertion (STRING-EQUAL ASDF-INSTALL::URL "http:// :END1 7) failed.

Type HELP for debugger help, or (SB-EXT:QUIT) to exit from SBCL.

restarts (invokable by number or by possibly-abbreviated name):

use Quicklisp[1] for installing/management of libraries, it works across platforms and implementations.

[1] http://www.quicklisp.org/beta/

Cells isn't in this month's Quicklisp because it didn't build for me. Kenny fixed it a few days later and it should be in December's edition.

The new homepage is here: https://github.com/kennytilton/cells/wiki

Shameless plug: I wrote something similar for Clojure. https://github.com/gcv/dgraph

Thats cool! I love Clojure and I love dataflow :) Just wondering how this compares to the dataflow library in clojure-contrib?

clojure.contrib.dataflow uses refs and works with side-effects on node cells. dgraph is (mostly) purely functional and its dependency graphs are persistent data structures, just like Clojure maps and vectors. I wrote dgraph specifically because I wanted those semantics.

Thanks!

Thats really awesome. That certainly makes it fit better with the rest of clojure than clojure.contrib.dataflow does. I'll probably end up using your library, it looks really good. Thanks for sharing.

http://ycombinator.com/ideas.html #22 then http://news.ycombinator.com/item?id=429477 (Ask HN: What can't you do in Excel?) then http://news.ycombinator.com/item?id=897701 (Ask HN: who will buy PG's startup idea #22?)

I would love to work in this. In Lisp.

In Python:

http://pycells.pdxcb.net/

As I mentioned in the Python spreadsheet thread (where I'm assuming this was found), this package has worked for everything I've tried to do with it but I do not believe it's maintained.

Does anybody know of something similar for Javascript? A cells implementation would be preferred, but a spreadsheet engine will do.

I'm not familiar with Cells or Pycells. Do you have any idea how this compares with Phillip Ebys Trellis[1] library?

[1] http://pypi.python.org/pypi/Trellis/0.7a2

From the linked page:

> Other Python libraries exist which attempt to do similar things, of course; PyCells and Cellulose are two. However, only the Trellis supports fully circular rules (like the temperature conversion example above), and intra-pulse write conflict detection. The Trellis also uses less memory for each cell (rule/value object), and offers many other features that either PyCells or Cellulose lack.

I believe PJE was the mentor for PyCells and Trellis is PJE's take on the problem. I was following PyCells from its announcement since it seemed useful and if PJE isn't the mentor, he was heavily consulted.

When I clicked to download the source, there was an error. Is funny that common-lisp.net use python, and use it with errors.

Just click on http://common-lisp.net/cgi-bin/viewcvs.cgi/cell-cultures/?cv...

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