Laoniu_Andy

interface ClassWithConstrutor { new (str: string): void; } function testOne(outerClass: ClassWithCon

interface FnWithAttrs { attr: string; (str: string): void; } const test: FnWithAttrs = (str: string)

function wait() { return new Promise(resolve => setTimeout(resolve, 10 * 1000

``` const getList = ([x, ...y]) => [x, y]; const getUser = user => {name: user.name, age: user.age};

``` const person = { name: 'Lydia' }; function sayHi(age) { console.log(`${this.name} is ${age}`); }

setInterval　的加高不会被调用 setInterval　的回调被调用一次 setInterval　的回调仍然会被每秒钟调用 我们没有调用过　config.alert()，config　为 n

for－in循环中，遍历的是对象的key，所以答案是： for (const item in person) { console.log(item) }

如果对象有两个具有相同名称的键，则将替换前面的键。先出现的位置保持不变，但值会被后出现的覆盖。 console.log(obj);　// `{`a: 'three', b: 'two'}

const one = (false || {} || null); const two = (null || false || '');