Anyone interested in this should check out Cliff Reiter's GUI version "Time(r) for the Game of Life" at http://www.vector.org.uk/archive/v213/cliff213.htm in which he demonstrates the use of "wd 'timer'". It's also a multi-colored version that uses the 3x3 tesselation method Gene mentions.
There's also copy of Gene's paper at http://portal.acm.org/citation.cfm?id=377719.55659 but, unfortunately, the OCR makes a mishmosh of the APL code. If Gene wouldn't mind, I could post a scan of the relevant page from the APL88 proceedings as I have a copy. On 3/8/07, Roger Hui <[EMAIL PROTECTED]> wrote:
Not only that, but on the long plane ride back from Sydney Eugene and Ken invented fork. ----- Original Message ----- From: Eugene McDonnell <[EMAIL PROTECTED]> Date: Wednesday, March 7, 2007 10:24 pm Subject: Re: [Jgeneral] Feb 2007 issue of Dr Dobbs > > On Mar 7, 2007, at 7:57 AM, ramacd wrote: > > > The article "Life: nasty, Brutish and Short" by(?) Eugene > > McDonnell, in an > > old Quote Quad, I think, gives many one-liners as well. IIRC, it > > > uses the > > Sharp APL cut operator, which is very similar to the ;. > conjunction > > in J. > > This separates out the 3 3 subarrays, and you can just apply the > > > life/death > > verb to each subarray. > > The APL88 Conference Proceedings (Sydney, Australia; APL Quote > Quad, > 18.2, December 1987) has my discussion of a "Life: Nasty, Brutish > and > Short" solution to the game of life program problem [pp 242-247], > with thanks to Donald Knuth and Roger Hui. The final N,B and S > solution uses just 9 tokens. > > Is it really 19 years since I wrote it? It was lots of fun. > > Eugene ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
-- Devon McCormick, CFA ^me^ at acm. org is my preferred e-mail ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
