See friends who liked a character

utils/Intersection.go

@@ -0,0 +1,16 @@
+package utils
+
+import "github.com/animenotifier/arn"
+
+// Intersection returns common elements of a and b.
+func Intersection(a []string, b []string) []string {
+	var c []string
+
+	for _, obj := range a {
+		if arn.Contains(b, obj) {
+			c = append(c, obj)
+		}
+	}
+
+	return c
+}