aoc2023/day-2/util.go

package main

import (
	"bufio"
	"log"
	"os"
	"strconv"
)

// readlines reads lines from stdin.
// Then it returns them as an array of strings
func readlines() []string {
	lines := []string{}

	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		lines = append(lines, scanner.Text())
	}

	if err := scanner.Err(); err != nil {
		log.Fatal(err)
	}

	return lines
}

// getIdForGame returns the id for a game
func getIdForGame(identifier string) (int, error) {
	m := regex["game"].FindStringSubmatch(identifier)
	i := regex["game"].SubexpIndex("game")
	id, err := strconv.Atoi(m[i])
	if err != nil {
		return 0, err
	}

	return id, nil
}