JS浅拷贝和深拷贝
2021-03-13 05:31
标签：lse var OLE string copy color ons style hello JS浅拷贝和深拷贝 标签：lse var OLE string copy color ons style hello 原文地址：https://www.cnblogs.com/yangxuming/p/12820808.html/**
* 浅拷贝
* @type {{address: {name: string}, sex: number, name: string}}
*/
let person1 = {
sname: ‘tommy‘
}
let person2 = person1;
person2.sname = ‘hello,tommy!‘
console.log(person2.sname) // hello,tommy!
console.log(person1.sname) //hello,tommy!
/**
* 深拷贝
* @type {{address: {name: string}, sex: number, name: string}}
*/
let person = {
name: ‘jack‘,
sex: 6,
address: {
name: ‘陕西西安‘
}
}
var person3 = deepCopy(person);
person3.address.name = ‘新疆乌鲁木齐‘
console.log(person3) // { name: ‘jack‘, sex: 6, address: { name: ‘新疆乌鲁木齐‘ } }
console.log(person) // { name: ‘jack‘, sex: 6, address: { name: ‘陕西西安‘ } }
function deepCopy(obj = {}) {
let result
if (typeof obj != "object" || obj == null) {
return obj
}
if (obj instanceof Array) {
result = []
} else {
result = {}
}
for (let key in obj) {
result[key] = deepCopy(obj[key])
}
return result
}