fix: slicing-housing-prices exercise bug

16-slices/exercises/15-slicing-housing-prices/main.go

@@ -94,6 +94,21 @@ package main
 //    Istanbul       500            10             5              1000000
 //
 //
+// Note : It works even if the Price's index > Size's index
+//
+//        In that case, it resets the invalid starting position to 0.
+//
+//        But it still uses the Size column.
+//
+//  go run main.go Price Size
+//    Location       Size
+//
+//    New York       100
+//    New York       150
+//    Paris          200
+//    Istanbul       500
+//
+//
 // HINTS
 //
 //  + strings.Split function can separate a string into a []string

16-slices/exercises/15-slicing-housing-prices/solution/main.go

@@ -45,10 +45,15 @@ Istanbul,500,10,5,1000000`
 		}
 	}
 
+	// from cannot be greater than to: reset invalid arg to 0
+	if from > to {
+		from = 0
+	}
+
 	for i, row := range rows {
 		cols := strings.Split(row, separator)
 
-		// print the only the requested columns
+		// print only the requested columns
 		for _, h := range cols[from:to] {
 			fmt.Printf("%-15s", h)
 		}