Re: csvReader: how to read only selected columns while the class Layout has extra field?

[mw via Digitalmars-d-learn]

```
        text.csvReader!Layout(["b","c","a"]);  // Read only these 
column
```
The intention is very clear: only read the selected columns from 
the csv, and for any other fields of class Layout, just ignore 
(with the default D .init value).