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Import helper

master
Karl Spickermann 1 year ago
commit 3c88a4fbdd

@ -0,0 +1,3 @@
module AOC2021
go 1.17

@ -0,0 +1,100 @@
package helper
import (
"errors"
"io/ioutil"
"sort"
"strconv"
"strings"
)
func GetInput(filename string) ([]string, error) {
content, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
lines := strings.Split(string(content), "\r\n")
return lines, err
}
func GetFile(filename string) (string, error) {
content, err := ioutil.ReadFile(filename)
if err != nil {
return "", err
}
return string(content), err
}
func MapToNumber(strings []string) ([]int, error) {
var numbers []int
for _, line := range strings {
number, err := strconv.Atoi(line)
if err != nil {
return numbers, err
}
numbers = append(numbers, number)
}
return numbers, nil
}
func FindAddendsForSum(possibleAddends []int, sum int) (int, int, error) {
var array = make([]int, len(possibleAddends))
copy(array, possibleAddends)
sort.Ints(array)
p1 := 0
p2 := len(array) - 1
for p1 < p2 {
if array[p1]+array[p2] < sum {
p1++
}
if array[p1]+array[p2] > sum {
p2--
}
if array[p1]+array[p2] == sum {
return array[p1], array[p2], nil
}
}
return 0, 0, errors.New("No fitting Addends found")
}
func SliceIndex(limit int, predicate func(i int) bool) int {
for i := 0; i < limit; i++ {
if predicate(i) {
return i
}
}
return -1
}
func DeleteAt(a []int, i int, ) []int {
return append(a[:i], a[i+1:]...)
}
func Equal(a, b []int) bool {
if len(a) != len(b) {
return false
}
for i, v := range a {
if v != b[i] {
return false
}
}
return true
}
func Contains(elem int, array []int) bool{
for _, val := range array{
if val == elem{
return true
}
}
return false
}
func AddNummbers(numbers ...int) int {
result := 0
for _, number := range numbers {
result += number
}
return result
}
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