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