Add day 6 solution.

2020/day04.go

@@ -9,25 +9,9 @@ import (
 	"strings"
 
 	"git.annabunch.es/annabunches/adventofcode/2020/lib/fileutils"
+	"git.annabunch.es/annabunches/adventofcode/2020/lib/util"
 )
 
-func splitPassports(input []string) []string {
-	converted := []string{}
-
-	current := ""
-	for _, line := range input {
-		if line == "" {
-			converted = append(converted, current)
-			current = ""
-			continue
-		}
-
-		current += " " + line
-	}
-
-	return converted
-}
-
 func countValidPassports(input []string, step string) int {
 	total := 0
 	for _, line := range input {
@@ -147,7 +131,7 @@ func makeInt(input string) int {
 func main() {
 	step := os.Args[1]
 	values := fileutils.InputParserStrings(os.Args[2])
-	values = splitPassports(values)
+	values = util.SplitOnBlankLine(values)
 
 	fmt.Println("Valid Passports:", countValidPassports(values, step))
 }