10.展开运算符
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<script>
// [...]展开运算符能将数组转换为逗号分割的参数序列
// 声明一个数组
let arr = ["张三", "李四", "王五"];
function fn() {
console.log(arguments);
}
fn(...arr); //等同于fn('张三','李四','王五')
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