Explode Function

function explode(n, limit) {
   if (n <= 1) return [[n]]
   var result = []
   var from = limit != undefined ? Math.min(limit, n-1) : n-1
   for (var j = from; j >= 1; j--) {
      var a = explode(n-j, j)
      for (var i = 0; i < a.length; i++) {
         result.push([j].concat(a[i]))
      }
   }
   return result
}