ES6 对象、数组结构

let arr = ['张三','李四','王五'];

let [a,b,c] = arr;
console.log(a);

let postForm = {
username: 'zhangsan',
password: '123235',
foo: function() {
console.log('foo函数')
}
}

let {username,foo} = postForm;

console.log(username);
foo();

//方法经常调用，对象的结构赋值，减少代码