init, 2015 & 2016

2016/internal/utility/input.go

@@ -0,0 +1,29 @@
+package utility
+
+import (
+	"os"
+	"strconv"
+	"strings"
+)
+
+func GetInput(path string) string {
+	data, err := os.ReadFile(path)
+	Error(err)
+	return string(data)
+}
+
+func GetLines(path string) []string {
+	data := GetInput(path)
+	return strings.Split(data, "\n")
+}
+
+func GetInts(path string) []int {
+	data := GetLines(path)
+	r := make([]int, len(data))
+	for _, line := range data {
+		t, err := strconv.Atoi(line)
+		Error(err)
+		r = append(r, t)
+	}
+	return r
+}

2016/internal/utility/utility.go

@@ -0,0 +1,35 @@
+package utility
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"log"
+)
+
+func Error(err error) {
+	if err != nil {
+		log.Panic(err)
+	}
+}
+
+type Point struct {
+	x int
+	y int
+}
+
+func NewPoint(x, y int) Point {
+	return Point{x, y}
+}
+
+func GetMD5Hash(in string) string {
+	hash := md5.Sum([]byte(in))
+	return hex.EncodeToString(hash[:])
+}
+
+func RuneMap(in string) (m map[rune]int) {
+	m = make(map[rune]int)
+	for _, c := range in {
+		m[c]++
+	}
+	return m
+}