题解 | #数组扁平化#
数组扁平化
https://www.nowcoder.com/practice/5d7e0cf4634344c98e6ae4eaa2336bed
return arr.toString().split(',').map(item => item -0)
<script>
const _flatten = arr => {
// 补全代码
// console.log(...(arr.toString()));
return arr.toString().split(',').map(item => item -0)
}
</script>
