フリー問題

問題文

The retailer needs the same trimming expression applied to forty differently named text columns without writing forty output fields by hand. Which advanced feature covers that?

選択肢

1. One expression written against the generic pattern expands over every matching column, and the specification would otherwise carry the expanded block that forty columns produce.
2. One expression written against the exhaustive pattern expands over every matching column, and the specification would otherwise carry the expanded block that forty columns produce.
3. One expression written against the generic pattern expands over every matching column, and the specification would otherwise carry the compact block that forty columns produce.
4. One expression written against the exhaustive pattern expands over every matching column, and the specification would otherwise carry the compact block that forty columns produce.