Elementary cellular automaton: Difference between revisions
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=={{header|Julia}}==
<syntaxhighlight lang="julia">
struct Automaton
g₀::Vector{Bool}
rule::Function
Automaton(n::Int) = new(
i -> isone.(digits(n; base = 2, pad = 8))[i])
end
Base.iterate(a::Automaton, g = a.g₀) =
g, @. a.rule(4*[g[end];g[1:end-1]] + 2*g + [g[2:end];g[1]] + 1)
Base.show(io::IO, a::Automaton) =
for g in Iterators.take(a, 10)
println(io, join(c ? '#' : '.' for c ∈ g))
end
for n ∈ [90, 30, 14]
println("rule $n:")
show(Automaton(n))
println()
end</syntaxhighlight> {{output}}
<pre>
rule 90:
.....#.......#.....
....#.#.....#.#....
...#...#...#...#...
..#.#.#.#.#.#.#.#..
.#...............#.
#.#.............#.#
rule 30:
.........#.........
........###........
.......##..#.......
......##.####......
.....##..#...#.....
....##.####.###....
...##..#....#..#...
..##.####..######..
.##..#...###.....#.
##.####.##..#...###
rule 14:
.........#.........
........##.........
.......##..........
......##...........
.....##............
....##.............
...##..............
..##...............
.##................
##.................
</pre>
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