madness continues

helpers/match.go

@@ -0,0 +1,16 @@
+package helpers
+
+func CountMatches(a, b []int) int {
+	m := make(map[int]bool)
+	for _, n := range b {
+		m[n] = true
+	}
+	match := 0
+	for _, n := range a {
+		if m[n] {
+			match++
+		}
+	}
+
+	return match
+}