<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>arr_slice2</title>
</head>
<body>
<script>
var arr = [[1],[2],[3],[4],[5]];
var arr2 = arr.slice(0,2);
console.log(arr2);
// [[1],[2]]
console.log(arr2.concat(arr.slice(-1)));
// [[1],[2],[5]]
</script>
</body>
</html>
js arr_slice2.html
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转载自blog.csdn.net/weixin_42193179/article/details/88172868
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