feat: day 1 first part done

cmd/01/01.go

@@ -0,0 +1,12 @@
+package main
+
+import (
+	"aoc2024/internal/common"
+	"aoc2024/internal/day01"
+)
+
+func main() {
+	input := common.LoadInputs("01_1.txt")
+	result := day01.Handle(input)
+	println(result)
+}

go.mod

@@ -0,0 +1,3 @@
+module aoc2024
+
+go 1.23.3

internal/common/common.go

@@ -0,0 +1,35 @@
+package common
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func Must[T any](obj T, err error) T {
+	if err != nil {
+		log.Fatal(err)
+	}
+	return obj
+}
+
+func LoadInputs(input string) []string {
+	fmt.Println("Opening file...")
+	bytes := Must(os.ReadFile("././inputs/" + input))
+	content := strings.Split(string(bytes), "\n")
+	return content[:len(content)-1]
+}
+
+func SumIntArr(arr []int) int {
+	sum := 0
+	for _, v := range arr {
+		sum += v
+	}
+	return sum
+}
+
+func StrToInt(str string) int {
+	return Must(strconv.Atoi(str))
+}

internal/day01/handle.go

@@ -0,0 +1,35 @@
+package day01
+
+import (
+	"math"
+	"sort"
+	"strings"
+
+	"aoc2024/internal/common"
+)
+
+func Handle(input []string) int {
+	list1 := make([]int, len(input))
+	list2 := make([]int, len(input))
+	distance := 0
+
+	for i, line := range input {
+		cols := strings.Split(line, "   ")
+		list1[i] = common.StrToInt(cols[0])
+		list2[i] = common.StrToInt(cols[1])
+	}
+
+	sort.Slice(list1, func(i, j int) bool {
+		return list1[i] < list1[j]
+	})
+
+	sort.Slice(list2, func(i, j int) bool {
+		return list2[i] < list2[j]
+	})
+
+	for i, v := range list1 {
+		distance = distance + int((math.Abs(float64(v - list2[i]))))
+	}
+
+	return distance
+}