Code Golf: Conway's Game of Life

Answer 1

RUST - 469 characters Don't know if I should post this here, (this post is 3 years old) but anyway, my try on this, in rust (0.9):

use std::io::fs::File;fn main(){
let mut c=File::open(&Path::new(std::os::args()[1])).read_to_end();
for _ in range(0,from_str::(std::os::args()[2]).unwrap()){
let mut b=c.clone();for y in range(0,40){for x in range(0,80){let mut s=0;
for z in range(x-1,x+2){for t in range(y-1,y+2){
if z>=0&&t>=0&&z<80&&t<40&&(x !=z||y !=t)&&c[t*81+z]==88u8{s +=1;}}}
b[y*81+x]=if s==3||(s==2&&c[y*81+x]==88u8){88u8} else {46u8};}}c = b;}
File::create(&Path::new("out.txt")).write(c);}

For people interested, here is the code before some agressive golfing:

use std::io::fs::File;
fn main() {
    let f = std::os::args()[1];
    let mut c = File::open(&Path::new(f)).read_to_end();    
    let n = from_str::(std::os::args()[2]).unwrap();   
    for _ in range(0,n)
    {
        let mut new = c.clone();
        for y in range(0,40) {
            for x in range(0,80) {
                let mut sum = 0;
                for xx in range(x-1,x+2){
                    for yy in range(y-1,y+2) {
                        if xx >= 0 && yy >= 0 && xx <80 && yy <40 && (x != xx || y != yy) && c[yy*81+xx] == 88u8
                        { sum = sum + 1; }
                    }
                }
                new[y*81+x] = if sum == 3 || (sum == 2 && c[y*81+x] == 88u8) {88u8} else {46u8};                    
            }
        }
        c = new;
    }
    File::create(&Path::new("out.txt")).write(c);
}