Completed both parts of Day 1 puzzle

day1/day1.go

@@ -0,0 +1,111 @@
+package day1
+
+import (
+	"strconv"
+)
+
+func calibrate(lines []string) int {
+	result := 0
+
+	for _, line := range lines {
+		first, second := -1, -1
+
+		for _, c := range line {
+			if c >= '1' && c <= '9' {
+
+				val, _ := strconv.Atoi(string(c))
+
+				if first == -1 {
+					first = int(val)
+				} else {
+					second = int(val)
+				}
+			}
+		}
+
+		if second == -1 {
+			second = first
+		}
+
+		result += first*10 + second
+	}
+
+	return result
+}
+
+func calibrate2(lines []string) int {
+	result := 0
+
+	for _, line := range lines {
+		first, second := -1, -1
+
+		for i := 0; i < len(line); i++ {
+			c := line[i]
+			if c >= '1' && c <= '9' {
+
+				val, _ := strconv.Atoi(string(c))
+
+				if first == -1 {
+					first = int(val)
+				} else {
+					second = int(val)
+				}
+			} else {
+				// parse one, two, three, four, five, six, seven, eight, and nine
+				val := -1
+
+				switch c {
+				case 'o':
+					if i+2 < len(line) && line[i+1] == 'n' && line[i+2] == 'e' {
+						val = 1
+					}
+				case 't':
+					if i+2 < len(line) && line[i+1] == 'w' && line[i+2] == 'o' {
+						val = 2
+					} else if i+4 < len(line) && line[i+1] == 'h' && line[i+2] == 'r' && line[i+3] == 'e' && line[i+4] == 'e' {
+						val = 3
+					}
+				case 'f':
+					if i+3 < len(line) && line[i+1] == 'i' && line[i+2] == 'v' && line[i+3] == 'e' {
+						val = 5
+					} else if i+3 < len(line) && line[i+1] == 'o' && line[i+2] == 'u' && line[i+3] == 'r' {
+						val = 4
+					}
+				case 's':
+					if i+4 < len(line) && line[i+1] == 'e' && line[i+2] == 'v' && line[i+3] == 'e' && line[i+4] == 'n' {
+						val = 7
+					} else if i+2 < len(line) && line[i+1] == 'i' && line[i+2] == 'x' {
+						val = 6
+					}
+				case 'e':
+					if i+4 < len(line) && line[i+1] == 'i' && line[i+2] == 'g' && line[i+3] == 'h' && line[i+4] == 't' {
+						val = 8
+					}
+				case 'n':
+					if i+3 < len(line) && line[i+1] == 'i' && line[i+2] == 'n' && line[i+3] == 'e' {
+						val = 9
+					}
+				}
+
+				if val > -1 {
+					if first == -1 {
+						first = int(val)
+					} else {
+						second = int(val)
+					}
+				}
+			}
+		}
+
+		if second == -1 {
+			second = first
+		}
+
+		if first > -1 {
+			lineVal := first*10 + second
+			result += lineVal
+		}
+	}
+
+	return result
+}

day1/day1_test.go

@@ -0,0 +1,70 @@
+package day1
+
+import (
+	"strings"
+	"testing"
+
+	"gitea.paas.celticinfo.fr/oabrivard/aoc2023/utils"
+)
+
+func TestCalibrate(t *testing.T) {
+	lines := []string{"1abc2", "pqr3stu8vwx", "a1b2c3d4e5f", "treb7uchet"}
+
+	result := calibrate(lines)
+
+	if result != 142 {
+		t.Fatalf("expected 142, got %d", result)
+	}
+}
+
+func TestCalibrateWithInput(t *testing.T) {
+	lines := utils.ReadLines("input.txt")
+	result := calibrate(lines)
+
+	if result != 53921 {
+		t.Fatalf("expected 53921, got %d", result)
+	}
+}
+
+func TestCalibrate2(t *testing.T) {
+	lines := strings.Split(`two1nine
+	eightwothree
+	abcone2threexyz
+	xtwone3four
+	4nineeightseven2
+	zoneight234
+	7pqrstsixteen`, "\n")
+
+	result := calibrate2(lines)
+
+	if result != 281 {
+		t.Fatalf("expected 281, got %d", result)
+	}
+}
+
+func TestCalibrate2tmp(t *testing.T) {
+	lines := strings.Split(`one
+	two
+	three
+	four
+	five
+	six
+	seven
+	eight
+	nine`, "\n")
+
+	result := calibrate2(lines)
+
+	if result != 495 {
+		t.Fatalf("expected 495, got %d", result)
+	}
+}
+
+func TestCalibrate2WithInput(t *testing.T) {
+	lines := utils.ReadLines("input.txt")
+	result := calibrate2(lines)
+
+	if result != 54676 {
+		t.Fatalf("expected 54676, got %d", result)
+	}
+}

go.mod

@@ -0,0 +1,3 @@
+module gitea.paas.celticinfo.fr/oabrivard/aoc2023
+
+go 1.21.4

utils/utils.go

@@ -0,0 +1,27 @@
+package utils
+
+import (
+	"bufio"
+	"log"
+	"os"
+)
+
+func ReadLines(fileName string) []string {
+	result := []string{}
+	file, err := os.Open(fileName)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		result = append(result, scanner.Text())
+	}
+
+	if err := scanner.Err(); err != nil {
+		log.Fatal(err)
+	}
+
+	return result
+}