adventofcode2023/parse.go

package main

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

var spaceReplacer = strings.NewReplacer("\t", "", " ", "")

func must(err error) {
	if err != nil {
		panic(err)
	}
}

func reachedeof(err error) bool {
	if err != nil {
		if err == io.EOF {
			return true
		} else {
			panic(err)
		}
	}

	return false
}

func scanints(str string) []int {
	ints := make([]int, 0)
	scanner := bufio.NewScanner(strings.NewReader(str))
	scanner.Split(bufio.ScanWords)

	for scanner.Scan() {
		val, err := strconv.Atoi(scanner.Text())
		if err != nil {
			panic(err)
		}
		ints = append(ints, val)
	}
	return ints
}

// reverses a slice in place
func reverseSlice[T any](s []T) {
	for i, j := 0, len(s)-1; i < j; i, j = i+1, j-1 {
		s[i], s[j] = s[j], s[i]
	}
}