2025 Day 7 Complete!

helpers/coordinateByteMap.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"math"
+	"slices"
 )
 
 type CoordByteMap struct {
@@ -93,14 +94,14 @@ func (m *CoordByteMap) GetCol(x int) []byte {
 
 func (m *CoordByteMap) AddRow(row []byte) {
 	y := m.BRY + 1
-	for x := 0; x < len(row); x++ {
+	for x := range row {
 		m.Put(Coordinate{X: x + m.TLX, Y: y}, row[x])
 	}
 }
 
 func (m *CoordByteMap) AddCol(col []byte) {
 	x := m.BRX + 1
-	for y := 0; y < len(col); y++ {
+	for y := range col {
 		m.Put(Coordinate{X: x, Y: y + m.TLY}, col[y])
 	}
 }
@@ -308,20 +309,29 @@ func (m *CoordByteMap) FindAll(b ...byte) []Coordinate {
 	return ret
 }
 
+func (m *CoordByteMap) FindAllOnRow(row int, b ...byte) []Coordinate {
+	var ret []Coordinate
+	if row < m.TLY || row > m.BRX {
+		return ret
+	}
+	for x := m.TLX; x <= m.BRX; x++ {
+		c := Coordinate{X: x, Y: row}
+		for i := range b {
+			if m.Get(c) == b[i] {
+				ret = append(ret, c)
+			}
+		}
+	}
+	return ret
+}
+
 func (m *CoordByteMap) FindAllNot(b ...byte) map[Coordinate]byte {
 	ret := make(map[Coordinate]byte)
 	for y := m.TLY; y <= m.BRY; y++ {
 		for x := m.TLX; x <= m.BRX; x++ {
 			c := Coordinate{X: x, Y: y}
 			v := m.Get(c)
-			var is bool
-			for i := range b {
-				if v == b[i] {
-					is = true
-					break
-				}
-			}
-			if !is {
+			if !slices.Contains(b, v) {
 				ret[c] = v
 			}
 		}