refactor: add positions method to grid and use that for iterating in day 4 part 1

cmd/04/main.go

@@ -1,12 +1,9 @@
 package main
 
 import (
-	"fmt"
-
 	"github.com/StevanFreeborn/advent-of-code-2025/internal/file"
 	"github.com/StevanFreeborn/advent-of-code-2025/internal/grid"
 	"github.com/StevanFreeborn/advent-of-code-2025/internal/move"
-	"github.com/StevanFreeborn/advent-of-code-2025/internal/position"
 )
 
 const PaperRollCharacter = "@"
@@ -17,26 +14,18 @@ func SolvePartOne(filePath string) int {
 
 	total := 0
 
-	for row := range grid.NumberOfRows() {
-		for column := range grid.NumberOfColumns() {
-			currentPosition := position.From(row, column)
-			value := grid.GetValueAt(currentPosition)
+	for position := range grid.Positions() {
+		value := grid.GetValueAt(position)
 
-			if value != PaperRollCharacter {
-				continue
-			}
+		if value != PaperRollCharacter {
+			continue
+		}
 
-			sameNeighbors := grid.GetSameNeighborsOf(currentPosition, move.AllDirections)
+		sameNeighbors := grid.GetSameNeighborsOf(position, move.AllDirections)
 
-			if row == 0 && column == 3 {
-				fmt.Println(sameNeighbors)
-			}
-
-			if len(sameNeighbors) < 4 {
-				total++
-			}
+		if len(sameNeighbors) < 4 {
+			total++
 		}
 	}
-
 	return total
 }