<!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 } // 方法7
let a6 = a1.filter(i => i) a6[0] = { age: 3 } console.log(a1, a6)
// 方法8
// Array.from
// 方法9
// Array.of
</script>
</body>
</html>
