day three solution

daythree.go

@@ -0,0 +1,115 @@
+package main
+
+import (
+	"fmt"
+	"math"
+	"strings"
+)
+
+func printRunes() {
+	fmt.Println("lowercase")
+	alphabet := "abcdefghijklmnopqrstuvwxyz"
+
+	for _, v := range alphabet {
+		fmt.Println(string(v), v)
+	}
+
+	fmt.Println("")
+	fmt.Println("uppercase")
+	alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+
+	for _, v := range alphabet {
+		fmt.Println(string(v), v)
+	}
+}
+
+func compare(f string, s string) (result rune) {
+	minLength := math.Min(float64(len(f)), float64(len(s)))
+
+	for i := 0; i < int(minLength); i++ {
+		// check each character of each string
+		if strings.Contains(s, string(f[i])) {
+			result = rune(f[i])
+			maxValue := math.Max(float64(result), float64(f[i]))
+
+			// assign the greatest value (between the current stored value
+			// and the newly found value) to our result
+			result = rune(maxValue)
+		} else if strings.Contains(f, string(s[i])) {
+			result = rune(s[i])
+			maxValue := math.Max(float64(result), float64(s[i]))
+			result = rune(maxValue)
+		}
+	}
+
+	return
+}
+
+func unique(e string) (result string, duplicated rune) {
+	for _, v := range e {
+		if strings.Contains(result, string(v)) {
+			duplicated = v
+			continue
+		}
+
+		result += string(v)
+	}
+
+	return
+}
+
+func runeToScore(input rune) int32 {
+	// filter out non-alphabetical runes
+	isBetweenRanges := input > 90 && input < 97
+	isAboveRange := input > 122
+	isBelowRange := input < 65
+
+	// for these, return zero (will not affect total score of solution)
+	if isBetweenRanges || isAboveRange || isBelowRange {
+		fmt.Println(input)
+		return 0
+	}
+
+	if input <= 90 {
+		// is uppercase
+		return int32(input - 38)
+	} else {
+		// is lowercase
+		return int32(input - 96)
+	}
+}
+
+func dayThree(input string) (solution int32) {
+	// split input by newlines
+	var eachPart = strings.Split(input, "\n")
+
+	// trim all remaining whitespace
+	for j := range eachPart {
+		eachPart[j] = strings.TrimSpace(eachPart[j])
+	}
+
+	for i := 0; i < len(eachPart); i++ {
+		part := eachPart[i]
+
+		if part == "" {
+			continue
+		}
+
+		// split string into two halves
+		front, back := part[0:len(part)/2], part[len(part)/2:]
+
+		fmt.Println(part)
+		fmt.Println(front, back)
+
+		// check each character against each other string
+		result := compare(front, back)
+		score := runeToScore(result)
+		fmt.Println(string(result), result, score)
+
+		// add each value to total score
+		solution += score
+		fmt.Println("")
+	}
+
+	return
+}

main.go

@@ -55,4 +55,20 @@ func main() {
 		`,
 	)
 	fmt.Println(dayTwoResult)
+
+	/** DAY THREE */
+	fmt.Println("\nDAY THREE")
+
+	var dayThreeResult = dayThree(
+	`
+	vJrwpWtwJgWrhcsFMMfFFhFp
+	jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL
+	PmmdzqPrVvPwwTWBwg
+	wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn
+	ttgJtRGJQctTZtZT
+	CrZsJsPPZsGzwwsLwLmpwMDw
+	`)
+
+	fmt.Println(dayThreeResult)
+	// printRunes()
 }