AOC2022/helper/helper.go

package helper

import (
	"os"
	"strings"
)

func check(e error) {
	if e != nil {
		panic(e)
	}
}

func RemoveError[T any](value T, e error) T {
	check(e)
	return value
}

func ReadTextFile(filePath string) []string {
	file, err := os.ReadFile(filePath)
	check(err)
	return strings.Split(string(file), "\r\n")
}

func FindRepeatedItems[T int | int64](itemgroup1, itemgroup2 []T) []T {
	elementsCompartment1 := map[T]bool{}
	repeatedElemnts := map[T]bool{}
	for _, item := range itemgroup1 {
		elementsCompartment1[item] = true
	}
	for _, item := range itemgroup2 {
		if elementsCompartment1[item] {
			repeatedElemnts[item] = true
		}
	}
	v := make([]T, 0, len(repeatedElemnts))
	for key, _ := range repeatedElemnts {
		v = append(v, key)
	}

	return v
}

func FindMax[T int | int64](slice []T) (m T) {
	for i, e := range slice {
		if i == 0 || e > m {
			m = e
		}
	}
	return
}

func Sum[T int | int64](slice []T) (s T) {
	for _, e := range slice {
		s += e
	}
	return
}