aoc2024/day-21/internal/one/util.go

package one

import (
	"bufio"
	"io"
	"strconv"
)

func parseLines(r io.Reader) ([]string, error) {
	codes := []string{}

	scanner := bufio.NewScanner(r)
	for scanner.Scan() {
		codes = append(codes, scanner.Text())
	}

	if err := scanner.Err(); err != nil {
		return nil, err
	}

	return codes, nil
}

func numFromCode(s string) int {
	n, _ := strconv.Atoi(s[:len(s)-1])
	return n
}