biggest_palindrom.groovy

start = System.currentTimeMillis();

numbers = 100..999;
products=[];
// Create all products
for(i in numbers) {
    for(j in 100..i) {
        products<<i*j;
    }
}
println "finished computing products";
// Now extract palindroms
palindroms = products.findAll { n ->
    s = n.toString();
    s.equals(s.reverse());
}
end = System.currentTimeMillis();
println "duration : "+(end-start)/1000.0+" s.";
println palindroms.max();