<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>arr_slice</title>
</head>
<body>
<script>
// slice，数组切片，原理是在原来的数组基础上复制了一份，再操作。
// 即创建了新的数组，和原来的数组没有关系了。
let arr1 = [1,2,3];
let arr2 = arr1.slice();
console.log('arr1;', arr1);
// [1, 2, 3]
console.log('arr2;', arr2);
// [1, 2, 3]
arr1.push(4);
console.log('arr1;', arr1);
// [1, 2, 3, 4]
console.log('arr2;', arr2);
// [1, 2, 3]
</script>
</body>
</html>
js arr_slice数组的切片与拷贝.html
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转载自blog.csdn.net/weixin_42193179/article/details/88091960
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