Add boilerplate and day01

Author: Justin van Grootveld

2021/create-day.sh

@@ -0,0 +1,49 @@
+#! /bin/sh
+
+DAY="$*"
+
+mkdir "${DAY}"
+touch "${DAY}/input.txt"
+touch "${DAY}/input_example.txt"
+echo "package ${DAY}
+
+import (
+	\"fmt\"
+)
+
+func Part01(input []int) int {
+	fmt.Println(\"HO HO HO!\")
+
+	return 0
+}
+
+func Part02(input []int) int {
+	fmt.Println(\"HO HO HO!\")
+
+	return 0
+}
+" > "${DAY}/part1.go"
+
+
+echo "package ${DAY}
+
+import (
+	\"fmt\"
+	\"testing\"
+	\"github.com/jvgrootveld/advent-of-code/avent2021/shared\"
+)
+
+func TestPart01(t *testing.T) {
+	content := shared.ReadFileAsInts(\"input_example.txt\")
+
+	result := Part01(content)
+	fmt.Println(\"Result: \", result) // ???
+}
+
+func TestPart02(t *testing.T) {
+	content := shared.ReadFileAsInts(\"input_example.txt\")
+
+	result := Part02(content)
+	fmt.Println(\"Result: \", result) // ???
+}
+" > "${DAY}/part1_test.go"

2021/day01/day01.go

@@ -0,0 +1,32 @@
+package day01
+
+import (
+	"github.com/jvgrootveld/advent-of-code/avent2021/shared"
+)
+
+// Part01
+// How many measurements are larger than the previous measurement?
+func Part01(input []int) int {
+	areLarger := 0
+
+	for i := 1; i < len(input); i++ {
+		if input[i] > input[i-1] {
+			areLarger++
+		}
+	}
+
+	return areLarger
+}
+
+// Part02
+// Consider sums of a three-measurement sliding window. How many sums are larger than the previous sum?
+func Part02(input []int) int {
+	var grouped []int
+
+	for i := 0; i < len(input) - 2; i++ {
+		summed := shared.SumInts(input[i : i+3])
+		grouped = append(grouped, summed)
+	}
+
+	return Part01(grouped)
+}

2021/day01/day01_test.go

@@ -0,0 +1,21 @@
+package day01
+
+import (
+	"fmt"
+	"github.com/jvgrootveld/advent-of-code/avent2021/shared"
+	"testing"
+)
+
+func TestPart01(t *testing.T) {
+	content := shared.ReadFileAsInts("input.txt")
+
+	result := Part01(content)
+	fmt.Println("Result: ", result) // 1390
+}
+
+func TestPart02(t *testing.T) {
+	content := shared.ReadFileAsInts("input.txt")
+
+	result := Part02(content)
+	fmt.Println("Result: ", result) // 1457
+}