int[][] nums = 10.map{ 10.map{ random(20) + 1 } }
OUTER:
 for (i = 0; i < nums.size(); i++) {
   for (j = 0; j < nums[i].size(); j++) {
     break OUTER if nums[i][j] == 20
     print sprintf("%2d ", nums[i][j])
   }
   println
 }