factors: refactor code to improve readability

1 files changed, 14 insertions, 20 deletions

diff --git a/factors/score.go b/factors/score.go
index 9288e8f..0759a74 100644
--- a/factors/score.go
+++ b/factors/score.go
@@ -36,26 +36,20 @@ func Score(n uint) float64 {
 // Also known as 2345 Rank.
 func BasicRank(n uint) string {
 	var firstRank, secondRank string
-	if n%2 == 0 {
-		if n%3 == 0 {
-			if n%4 == 0 {
-				firstRank = "A"
-			} else {
-				firstRank = "B"
-			}
-		} else {
-			if n%4 == 0 {
-				firstRank = "C"
-			} else {
-				firstRank = "D"
-			}
-		}
-	} else {
-		if n%3 == 0 {
-			firstRank = "E"
-		} else {
-			firstRank = "F"
-		}
+
+	switch uint(0) {
+	case n % 12:
+		firstRank = "A"
+	case n % 6:
+		firstRank = "B"
+	case n % 4:
+		firstRank = "C"
+	case n % 2:
+		firstRank = "D"
+	case n % 3:
+		firstRank = "E"
+	default:
+		firstRank = "F"
 	}
 
 	switch n % 5 {