chore: import upstream snapshot with attribution

pkg/converter/array.go

@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package converter
+
+func ArrayNotInArray(original []string, search []string) []string {
+	var result []string
+	originalMap := make(map[string]bool)
+	for _, v := range original {
+		originalMap[v] = true
+	}
+	for _, v := range search {
+		if _, ok := originalMap[v]; !ok {
+			result = append(result, v)
+		}
+	}
+	return result
+}
+
+func UniqueArray[T comparable](input []T) []T {
+	result := make([]T, 0, len(input))
+	seen := make(map[T]bool, len(input))
+	for _, element := range input {
+		if !seen[element] {
+			result = append(result, element)
+			seen[element] = true
+		}
+	}
+	return result
+}