remove unused functions and fields

day-10/internal/two/graph.go

@@ -1,14 +1,12 @@
 package two
 
 import (
-	"slices"
 	"strings"
 )
 
 type point struct {
-	x         int
-	y         int
-	direction int
+	x int
+	y int
 }
 
 type graph struct {
@@ -31,11 +29,3 @@ func (g *graph) isOutOfBounds(p point) bool {
 func (g *graph) valueAt(p point) rune {
 	return rune(g.data[p.y][p.x])
 }
-
-func (g *graph) debug(path []point) string {
-	temp := slices.Clone(g.data)
-	for _, pos := range path {
-		temp[pos.y] = replaceAtIndex(temp[pos.y], '+', pos.x)
-	}
-	return strings.Join(temp, "\n")
-}

day-10/internal/two/neighbours.go

@@ -2,9 +2,9 @@ package two
 
 func neighbours(p point) [4]point {
 	return [4]point{
-		{p.x, p.y - 1, N},
-		{p.x + 1, p.y, E},
-		{p.x, p.y + 1, S},
-		{p.x - 1, p.y, W},
+		{p.x, p.y - 1},
+		{p.x + 1, p.y},
+		{p.x, p.y + 1},
+		{p.x - 1, p.y},
 	}
 }

day-10/internal/two/solve.go

@@ -34,15 +34,11 @@ func Solve(buf []byte) (int, error) {
 				continue
 			}
 
-			for dir, n := range neighbours(current) {
+			for _, n := range neighbours(current) {
 				if graph.isOutOfBounds(n) {
 					continue
 				}
 
-				if n.direction == None {
-					n.direction = dir
-				}
-
 				if graph.valueAt(n)-graph.valueAt(current) == 1 {
 					log.Tracef("pushing %v with value %s back onto the queue\n", n, string(graph.valueAt(n)))
 					queue.Enqueue(n)

day-10/internal/two/util.go

@@ -22,7 +22,7 @@ func parseLines(r io.Reader) (*graph, error) {
 		for _, m := range reStartPos.FindAllStringIndex(line, -1) {
 			graph.startPositions = append(
 				graph.startPositions,
-				point{x: m[0], y: linecount, direction: None},
+				point{x: m[0], y: linecount},
 			)
 		}
 
@@ -37,9 +37,3 @@ func parseLines(r io.Reader) (*graph, error) {
 
 	return graph, nil
 }
-
-func replaceAtIndex(s string, r rune, i int) string {
-	out := []rune(s)
-	out[i] = r
-	return string(out)
-}