code: func DiffPartitions(a []int32, b []int32) []int32 {
  	var diff []int32
  Iter:
  	for _, eA := range a {
  		for _, eB := range b {
  			if eA == eB {
  				continue Iter
  			}
  		}
  		diff = append(diff, eA)
  	}
  	return diff
  }
docs: // returns elements that are in a but not in b