Example of using an empty interface slice to hold pointers to another slice in Go

typesEmptyInterfaceSlice.go

cols, err := rows.Cols()

// rows.Scan wants '[]interface{}' as an argument, but we want the values
// loaded into a '[]string'.  So we must copy the references into such a slice
// See http://code.google.com/p/go-wiki/wiki/InterfaceSlice for details
scanArgs := make([]interface{}, len(cols))
values := make([]string, len(cols))
for i := range values {
  scanArgs[i] = &values[i]
}

if rows.Next() {
  // Load the row data into scanArgs, which references values
  err := rows.Scan(scanArgs...)
}