Day4

day4/day4.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"AOC2022/helper"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	args := os.Args[1:]
+	lines := helper.ReadTextFile(args[0])
+	sum1 := 0
+	sum2 := 0
+	for _, line := range lines {
+		orders := getOrders(line)
+		if orders[0] <= orders[2] && orders[1] >= orders[3] {
+			sum1++
+		} else if orders[2] <= orders[0] && orders[3] >= orders[1] {
+			sum1++
+
+		}
+		if !(orders[2] > orders[1] || orders[3] < orders[0]) {
+			sum2++
+		}
+	}
+	fmt.Println(sum1)
+	fmt.Println(sum2)
+}
+
+func getOrders(line string) (orders [4]int) {
+	orderparts := strings.FieldsFunc(line, split)
+	for i, part := range orderparts {
+		orders[i] = helper.RemoveError(strconv.Atoi(part))
+	}
+	return
+}
+
+func split(r rune) bool {
+	return r == '-' || r == ','
+}

day4/testInput

@@ -0,0 +1,6 @@
+2-4,6-8
+2-3,4-5
+5-7,7-9
+2-8,3-7
+6-6,4-6
+2-6,4-8

helper/helper.go

@@ -22,6 +22,25 @@ func ReadTextFile(filePath string) []string {
 	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 {