如何在同一个变量中组合？

var var1 = "Hello";
var var2 = "World";
var combined = var1 + var2;
console.log(combined);  // 输出：HelloWorld

var1 = "Hello"
var2 = "World"
combined = var1 + var2
print(combined)  # 输出：HelloWorld

var array1 = [1, 2, 3];
var array2 = [4, 5, 6];
var combined = array1.concat(array2);
console.log(combined);  // 输出：[1, 2, 3, 4, 5, 6]

list1 = [1, 2, 3]
list2 = [4, 5, 6]
combined = list1 + list2
print(combined)  # 输出：[1, 2, 3, 4, 5, 6]

var obj1 = { name: "John" };
var obj2 = { age: 30 };
var combined = Object.assign({}, obj1, obj2);
console.log(combined);  // 输出：{ name: "John", age: 30 }

dict1 = { "name": "John" }
dict2 = { "age": 30 }
combined = { **dict1, **dict2 }
print(combined)  # 输出：{ "name": "John", "age": 30 }