code: func (t Result) Float() float64 {
  	switch t.Type {
  	default:
  		return 0
  	case True:
  		return 1
  	case String:
  		n, _ := strconv.ParseFloat(t.Str, 64)
  		return n
  	case Number:
  		return t.Num
  	}
  }
docs: // Float returns an float64 representation.