如何在不影响其他集合的情况下编写联合方法？

function unionArrays(arr1, arr2) {
    return [...new Set([...arr1, ...arr2])];
}

const array1 = [1, 2, 3];
const array2 = [2, 3, 4];
const result = unionArrays(array1, array2);
console.log(result); // 输出: [1, 2, 3, 4]

import java.util.HashSet;
import java.util.Set;

public class UnionExample {
    public static <T> Set<T> unionSets(Set<T> set1, Set<T> set2) {
        Set<T> resultSet = new HashSet<>(set1);
        resultSet.addAll(set2);
        return resultSet;
    }

    public static void main(String[] args) {
        Set<Integer> set1 = new HashSet<>();
        set1.add(1);
        set1.add(2);

        Set<Integer> set2 = new HashSet<>();
        set2.add(2);
        set2.add(3);

        Set<Integer> result = unionSets(set1, set2);
        System.out.println(result); // 输出: [1, 2, 3]
    }
}

def union_dicts(dict1, dict2):
    result = dict1.copy()
    result.update(dict2)
    return result

dict1 = {'a': 1, 'b': 2}
dict2 = {'b': 3, 'c': 4}
result = union_dicts(dict1, dict2)
print(result)  # 输出: {'a': 1, 'b': 3, 'c': 4}