数组扩展方法

Object.assign()

对象浅拷贝。

javascript

const obj = {
    name: 'xiaoming',
    age: 18
}

const obj2 = Object.assign({}, obj)

obj2.name = 'libai'

console.log(obj.name) // 'xiaoming'

const obj = {
    name: 'xiaoming',
    age: 18
}

const obj2 = Object.assign({}, obj)

obj2.name = 'libai'

console.log(obj.name) // 'xiaoming'

Object.keys()

提取对象的所有键组成一个数组返回。

javascript

const obj = {
    name: 'xiaoming',
    age: 18
}

const keys = Object.keys(obj) // ['name', 'age']

const obj = {
    name: 'xiaoming',
    age: 18
}

const keys = Object.keys(obj) // ['name', 'age']

Object.values()

提取对象的所有值组成一个数组返回。

javascript

const obj = {
    name: 'xiaoming',
    age: 18
}

const values = Object.values(obj) // ['xiaoming', 18]

const obj = {
    name: 'xiaoming',
    age: 18
}

const values = Object.values(obj) // ['xiaoming', 18]

数组扩展方法 ​