# Noam's Website About Software

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# Conway's Game Of Life In 298 Characters Of Julia

Yesterday I got distracted playing around with Julia and ended up making this little Conway’s Game of Life. Would fit into a tweet if not for the pretty-printing / animation loop!.

Works using matrix operations. Parameters by line (uppercase are matrices):

1. d = size of board (dxd).
2. S game / map state in 1 and 0 values for on/off.
3. U = shift board up if left-multiplied, right if right-multiplied. D = down, left.
4. Clears screen between animation loops.
5. c = value of each cell is how many neighbors in S.
6. Prettyprint each row in S.

You can also change how many generations it will go through (99 currently).

d=30
a=1:d;S=[rand(1:5)==1?1:0 for r=a,c=a]
x=(o,t)->[r==o(c,1)||r==t(c,d-1)?1:0 for r=a,c=a];U=x(-,+);D=x(+,-)
for i=1:99;print("\e[2J")
S=map((c,o)->(c==2&&o==1)||c==3?1:0,U*S+S*U+D*S+S*D+U*S*U+U*S*D+D*S*D+D*S*U,S);
for i=a;foldl((p,x)->p*(x==1?"█":".")," ",S[i,a])|>println;end;sleep(0.5);end


Tags: featured , julialang , conway , automata