Update xor.go

Go/xor.go

@@ -1,11 +1,15 @@
 package xor
 
+import "strings"
+
 // EncryptDecrypt runs a XOR encryption on the input string, encrypting it if it hasn't already been,
 // and decrypting it if it has, using the key provided.
-func EncryptDecrypt(input, key string) (output string) {
+func EncryptDecrypt(input, key string) string {
 	kL := len(key)
-	for i := range input {
-		output += string(input[i] ^ key[i%kL])
+
+	var tmp []string
+	for i := 0; i < len(input); i++ {
+		tmp = append(tmp, string(input[i]^key[i%kL]))
 	}
-	return output
+	return strings.Join(tmp, "")
 }