ES6中展开运算符的基本使用

<script type="text/javascript">
		let arr1 = [1, 3, 5, 7, 9]
		let arr2 = [2, 4, 6, 8, 10]
		// console.log(...arr1); //展开一个数组
		let arr3 = [...arr1, ...arr2]//连接数组

		//在函数中使用
		function sum(...numbers) {
			return numbers.reduce((preValue, currentValue) => {
				return preValue + currentValue
			})
		}
		// console.log(sum(1, 2, 3, 4));

		//构造字面量对象时使用展开语法
		var person = { name: 'tom', age: 18, add: { city: 'beijing', price: { num: 123 } } }
		let person2 = { ...person }
		//console.log(...person); //报错，展开运算符不能展开对象
		person.name = 'jerry'
		person.add.city = 'shanghai'
		person.add.price.num = 456
		console.log(person);
		console.log(person2);
		//第一层为深拷贝，第二层为浅拷贝
		//合并
		let person3 = { ...person, name: 'jack', address: "地球" }
			// console.log(person3);

	</script>