aoc2024/day-10/internal/two/graph.go

package two

import (
	"strings"
)

type point struct {
	x int
	y int
}

type graph struct {
	data           []string
	startPositions []point
}

func newGrid() *graph {
	return &graph{data: make([]string, 0), startPositions: make([]point, 0)}
}

func (g *graph) String() string {
	return strings.Join(g.data, "\n")
}

func (g *graph) isOutOfBounds(p point) bool {
	return p.x < 0 || p.y < 0 || p.y >= len(g.data) || p.x >= len(g.data[p.y])
}

func (g *graph) valueAt(p point) rune {
	return rune(g.data[p.y][p.x])
}