Until recently, custom iterators were probably the most common way to iterate over a list of elements that might trigger an error. Several examples exist in the standard library. Perhaps the most well known would be the sql.Rows type, which provides (among others), the following methods: Next() bool — Advances to the next item Scan(...any) error — Processes the current item Err() error — Reports an iteration error Close() error — Closes iterator, possibly before the last item has been...
