Hello people of Ruby-Talk! My first email to the list, to any list for that matter. Saying Hi and introducing myself, I'm joey AKA j`ey from IRC. Asking for a bit of help, I have the following code at http://www.eachmapinject.com/code/game_of_life_golf.rb which is an implemintation of the Game of Life I would like to be able to have it as a signature, you know 80*4, but its 34 characters over. Any suggestions on golfing/shortening it anymore? Thanks j`ey eachmapinject.com

on 2006-05-03 19:03

on 2006-05-03 19:04

```
Joey wrote:
> Any suggestions on golfing/shortening it anymore?
Do you have a non-obfuscated version you could share? Do that and I'm
certain you'll see some impressive golf.
--Steve
```

on 2006-05-03 19:06

On 5/3/06, Joey <rubytalk@eachmapinject.com> wrote: > Asking for a bit of help, I have the following code at > http://www.eachmapinject.com/code/game_of_life_golf.rb which is an > implemintation of the Game of Life > I would like to be able to have it as a signature, you know 80*4, but its 34 > characters over. > Any suggestions on golfing/shortening it anymore? I've taken it down by 15 (to 347 not including newlines) trivially: * -7: inline values of L and s * -3: add a var, N, which is nil, and replace all () with u * -3: remove redundant ,() from initialization sequence (a,b,c=1,2; c #=> nil) * -2: replace " " with f on line 2 * 0: uppercase constants O and F O,F,N,c="#"," ";b=([N]*20).map{(0..20).map{(rand<0.3)?O:F}};$><<"\e[2J";until c==b;$><<"\e[H"<<b.map{|x|x*F}*"\n";c=b.map{|z|z.dup};b.each_index{|i|b[i].each_index{ |e|n=(q,z=-1..1,[];q.map{|x|q.map{|y|z<<[x,y]}};(z-=[[0,0]]).map{|x|c[i+x[0]][e+x[1]]rescue N}-[F,N]).size;(b[i][e]==O)?(n>3||n<2)?b[i][e]=F:N:(n==3)?b[i][e]=O:N}};sleep 0.2;end Cheers, Dave

on 2006-05-03 19:06

Dave Burt wrote: > c==b;$><<"\e[H"<<b.map{|x|x*F}*"\n";c=b.map{|z|z.dup};b.each_index{|i|b[i].each_index{ > > |e|n=(q,z=-1..1,[];q.map{|x|q.map{|y|z<<[x,y]}};(z-=[[0,0]]).map{|x|c[i+x[0]][e+x[1]]rescue > > N}-[F,N]).size;(b[i][e]==O)?(n>3||n<2)?b[i][e]=F:N:(n==3)?b[i][e]=O:N}};sleep > > 0.2;end > This doesn't work with my Ruby one-click 1.8.2: SyntaxError: compile error (irb):1: syntax error O,F,N,c="#"," ";b=([N]*20).map{(0..20).map{(rand<0.3)?O:F}};$><<"\e[2J";until ^ (irb):4: syntax error N}-[F,N]).size;(b[i][e]==O)?(n>3||n<2)?b[i][e]=F:N:(n==3)?b[i][e]=O:N}};sleep ^ (irb):4: syntax error N}-[F,N]).size;(b[i][e]==O)?(n>3||n<2)?b[i][e]=F:N:(n==3)?b[i][e]=O:N}};sleep ^ from (irb):5

on 2006-05-03 19:06

On 5/3/06, Roy Sutton <roys@mindspring.com> wrote: > This doesn't work with my Ruby one-click 1.8.2: > > SyntaxError: compile error > ... Sorry about that. I didn't test it because I'm on Windows and the ANSI escape codes don't work. Apparently the problem is that (foo)?bar:baz is parsed as (foo) ? bar : baz (a trigraph) but (foo)?Bar:baz is trying to see :baz as a symbol. I think this is a (minor) parser bug - it could easily be parsed the same as (foo)?bar:baz. Anyway, just replace all O,F,N with o,f,u respectively, and it works like a charm. Seriously this time. Cheers, Dave

on 2006-05-03 20:43

o,f,u,c="#"," ";b=([u]*20).map{(0..20).map{(rand<0.3)?o:f}};$><<"\e[2J";until c==b;$><<"\e[H"<<b.map{|x|x*f}*"\n";c=b.map{|x|x.dup};20.times{|i|20.times{ |e|n=(q,z=-1..1,[];q.map{|x|q.map{|y|z<<[x,y]}};(z-[[0,0]]).map{|x|c[i+x[0]][ e+x[1]]rescue u}-[f,u]).size;b[i][e]=(n==2?b[i][e]:n==3?o:f)}};sleep 0.1;end

on 2006-05-03 20:52

Dave Burt wrote: > o,f,u,c="#"," > ";b=([u]*20).map{(0..20).map{(rand<0.3)?o:f}};$><<"\e[2J";until > c==b;$><<"\e[H"<<b.map{|x|x*f}*"\n";c=b.map{|x|x.dup};20.times{|i|20.times{ > |e|n=(q,z=-1..1,[];q.map{|x|q.map{|y|z<<[x,y]}};(z-[[0,0]]).map{|x|c[i+x[0]][ > e+x[1]]rescue u}-[f,u]).size;b[i][e]=(n==2?b[i][e]:n==3?o:f)}};sleep 0.1;end You know what I mean. That first newline is meant to be a space in quotes (" "). Can I blame my mail agent for this? Cheers, Dave

on 2006-05-03 21:02

de-obfuscated it a bit to understand it :) L = 0.3 # % of # s = 20 # size o = "#" f = " " c = nil b = ([nil]*s).map{ (0..s).map{ (rand < L) ? o : f } }; $> << "\e[2J"; until c==b; $> << "\e[H" << b.map{|x|x * " "} * "\n" c = b.map{|z| z.dup }; b.each_index{|y| b[y].each_index{|x| q = -1..1 z = [] q.map{|dx| q.map{|dy| z << [dx,dy]}}; z -= [[0,0]] n = ( z.map{|dxy| c[y + dxy[0]][x + dxy[1]] rescue nil } - [f,nil] ).size if b[y][x]==o b[y][x] = f if (n>3||n<2) else b[y][x] = o if n==3 end } } sleep 0.2 end some ways i found to decrease the size: remove "-[[0,0]]" and change the condition to (n>4||n<3) to account for the +1 "rescue f" over "rescue ()", and -[f] over -[f,nil] possible bug here though: c[i+x[0]][e+x[1]] take i=e=0 and x=[-1,-1], this results in c[-1][-1] which is bottom-right, i don't think this is what you want (unless i misunderstood the 'game').

on 2006-05-03 21:17

I now have my signature! It is 305 charcters long, wit help from Florian and Dave! you can check it out at http://code.eachmapinject.com/game_of_life_golf.rb or just below my name! Joey http://eachmapinject.com s,o,f,c,u=20,"#"," ";b=(z=0..s).map{z.map{(rand<0.3)?o:f}};$><<"\e[2J";until c==b;$><<"\e[H"<<b.map{|x|x*" "}*"\n";c=b.map{|z|z.dup};s.times{|i|s.times{| e|n=(q,z=-1..1,[];q.map{|x|q.map{|y|z<<[x,y]}};(z-=[[0,0]]).map{|x|c[i+x[0]][ e+x[1]]rescue u}-[f,u]).size;b[i][e]=(n==2?b[i][e]:n==3?o:f)}};sleep 0.2;end

on 2006-05-03 23:43

Sander Land wrote: > de-obfuscated it a bit to understand it :) Here's what I used: o = "#" f = " " c = nil # copy of b # u = nil # alias for nil # b # main grid b = ([nil] * 20).map { (0..20).map { (rand < 0.3) ? o : f } } $> << "\e[2J" # this line is not strictly necessary (11 bytes) until c == b $> << "\e[H" << b.map {|x| x * f } * "\n" c = b.map {|x| x.dup } 20.times {|i| # -4: b.each_index => 20.times 20.times {|e| # -7: b[i].each_index => 20.times n = ( q, z = -1..1, [] q.map {|x| q.map {|y| z << [x, y] } } (z - [[0, 0]]).map {|x| # -1: -= => - c[i + x[0]][e + x[1]] rescue nil } - [f, nil] ).size b[i][e]=(n==2?b[i][e]:n==3?o:f) # -23 } } sleep 0.1 end > some ways i found to decrease the size: > remove "-[[0,0]]" and change the condition to (n>4||n<3) to account for Good one. Can still do that to my result. -8 > the +1 > "rescue f" over "rescue ()", and -[f] over -[f,nil] -2 > possible bug here though: > c[i+x[0]][e+x[1]] > take i=e=0 and x=[-1,-1], this results in c[-1][-1] which is > bottom-right, i don't think this is what you want (unless i > misunderstood the 'game'). It's sort of a feature - it's half a wrap-rule. Here's both halves and minus another character: < c[i+x[0]][e+x[1]] rescue f > c[(i+x[0])%s][(e+x[1])%s] That's assuming you put s=20 back in, which costs you that character right back again, but is worth it, because that's now 6 esses. Cheers, Dave