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- #!/usr/bin/ruby
- var w = Number(`tput cols` || 80)
- var h = Number(`tput lines` || 24)
- var r = "\033[H"
- var rh = ^h
- var rw = ^w
- var dirs = [[-1,-1], [-1, 0], [-1, 1], [ 0,-1],
- [ 0, 1], [ 1,-1], [ 1, 0], [ 1, 1]]
- var universe = h.of { w.of { 1.rand < 0.1 } }
- func iterate {
- var new = h.of { w.of(nil) }
- for i=rh, j=rw {
- var neighbor = 0
- for y,x in (dirs.map {|dir| dir »+« [i, j] }) {
- universe[y % h][x % w] && ++neighbor
- neighbor > 3 && break
- }
- new[i][j] = (universe[i][j]
- ? (neighbor==2 || neighbor==3)
- : (neighbor==3))
- }
- universe = new
- }
- STDOUT.autoflush(true)
- loop {
- print r
- print universe.map{|row| row.map{|cell| cell ? '#' : ' '}.join }.join("\n")
- iterate()
- }
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