numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9]
count = 3
sum = 10
f(numbers, count, sum)
function f(n, c, s, it = 1, an = [], nn, as = 0, r = {}){
 if(nn) an.push(nn)
 for(var i = it - 1; i ‹ n.length; i++){
  if(it ‹ c){
   f(n, c, s, it + 1, an.slice(0), n[i], as + n[i], r)
  } else if(as + n[i] == s){
   an.push(n[i])
   an.sort()
   var t = an.join(', ')
   if(r[t]) return
   else r[t] = 1
   console.log(t)
  }
 }
}