标签：fine console port ons cti log rip charset fun
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>数组深拷贝</title>
</head>
<body>
<script type="text/javascript">
let a1 = [{age:1}];
// 方法一 loadsh
// 方法二 json
let a2 = JSON.parse(JSON.stringify(a1))
a2[0].age = 2
console.log(a1,a2)
// 方法3
let a3 = a1.concat()
a3[0] = {age:2}
console.log(a1,a3)
// 方法4
let a4 = a1.slice()
a4[0] = {age:3}
console.log(a1,a4)
// 方法5
let a5 = a1.splice()
a5[0] = {age:3}
console.log(a1,a5)
// 方法6
function copy(arr){
let obj = arr instanceof Array?[]:{};
for (let i in arr) {
if (typeof arr[i] == ‘object‘ && arr[i] !== undefined) {
obj[i] = copy(arr[i])
} else if(typeof arr[i] == ‘object‘ && arr[i] == undefined){
obj[i] = null
} else {
obj[i] = arr[i]
}
}
return obj
}
</script>
</body>
</html>
标签：fine console port ons cti log rip charset fun
原文地址：https://www.cnblogs.com/mengfangui/p/10383689.html
