i miss go, idk if it misses me

2022/day01/main.go

@@ -0,0 +1,79 @@
+package main
+
+import (
+	_ "embed"
+	"flag"
+	"fmt"
+	"sort"
+	"strings"
+
+	"github.com/alexchao26/advent-of-code-go/cast"
+	"github.com/alexchao26/advent-of-code-go/mathy"
+	"github.com/alexchao26/advent-of-code-go/util"
+)
+
+//go:embed input.txt
+var input string
+
+func init() {
+	// do this in init (not main) so test file has same input
+	input = strings.TrimRight(input, "\n")
+	if len(input) == 0 {
+		panic("empty input.txt file")
+	}
+}
+
+func main() {
+	var part int
+	flag.IntVar(&part, "part", 1, "part 1 or 2")
+	flag.Parse()
+	fmt.Println("Running part", part)
+
+	if part == 1 {
+		ans := part1(input)
+		util.CopyToClipboard(fmt.Sprintf("%v", ans))
+		fmt.Println("Output:", ans)
+	} else {
+		ans := part2(input)
+		util.CopyToClipboard(fmt.Sprintf("%v", ans))
+		fmt.Println("Output:", ans)
+	}
+}
+
+func part1(input string) int {
+	elves := parseInput(input)
+
+	totals := []int{}
+	for _, items := range elves {
+		totals = append(totals, mathy.SumIntSlice(items))
+	}
+
+	return mathy.MaxInt(totals...)
+}
+
+func part2(input string) int {
+	elves := parseInput(input)
+
+	totals := []int{}
+	for _, items := range elves {
+		totals = append(totals, mathy.SumIntSlice(items))
+	}
+	sort.Ints(totals)
+
+	topThree := 0
+	for i := 0; i < 3; i++ {
+		topThree += totals[len(totals)-1-i]
+	}
+	return topThree
+}
+
+func parseInput(input string) (ans [][]int) {
+	for _, group := range strings.Split(input, "\n\n") {
+		row := []int{}
+		for _, line := range strings.Split(group, "\n") {
+			row = append(row, cast.ToInt(line))
+		}
+		ans = append(ans, row)
+	}
+	return ans
+}

2022/day01/main_test.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"testing"
+)
+
+func Test_part1(t *testing.T) {
+	tests := []struct {
+		name  string
+		input string
+		want  int
+	}{
+		{
+			name:  "actual",
+			input: input,
+			want:  66719,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := part1(tt.input); got != tt.want {
+				t.Errorf("part1() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_part2(t *testing.T) {
+	tests := []struct {
+		name  string
+		input string
+		want  int
+	}{
+		{
+			name:  "actual",
+			input: input,
+			want:  198551,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := part2(tt.input); got != tt.want {
+				t.Errorf("part2() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}