Super Tiny Conway's Game Of Life

tiny_conways.jl

# 298 character CGOL in Julia. (Would fit into a tweet if not for the
# pretty-printing / animation loop!). It goes through 99 generations.
#
# Works using matrix operations, starts with randomly generated board.
# 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`.

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