getOneBits.scala

    def getOneBits(n: Int): Array[Int] = {
        
        var start: Int = 0
        var total: Int = 0
        val bin = n.toBinaryString
        
        bin.foreach( c => if(c == '1') total += 1)
        
        var positions = List(total)
        
        for ((c, i) <- bin.zip(Stream from 1)) {
          if(c == '1' && start == 0) start = i

          if(c == '1') { 
            positions =  i :: positions
          }
        }
        
        positions = positions.reverse
        
        return positions.toArray
    }