<script>
const sum = (...args) => {
let total = 0;
args.forEach(item => total += item);
return total;
}
console.log(sum(10, 20)); // 30
console.log(sum(10, 20, 30)); // 60
</script>
let ary1 = [‘张三‘, ‘李四‘, ‘王五‘];
let [s1, ...s2] = ary1;
console.log(s1); // 张三
console.log(s2); // Array(2) [ ‘李四‘, ‘王五‘]
