gistfile1.js

// Courtesy of Jeffery Rafter

function addToNine(num) {
  var totals = [];


  for (var i = 0; i < Math.pow(10, num); i++) {
    var total = 0;
    
    for (var j = 1; j <= num; j++) {
      var max = Math.pow(10, j);
      var min = max / 10;
      total += (i % max - i % min) / min;
    }
    
    if (total === 9) {
      totals.push(i);
    }
  }

  return totals;
}