题解 | #数组扁平化#
数组扁平化
https://www.nowcoder.com/practice/5d7e0cf4634344c98e6ae4eaa2336bed
题解：递归数组判断
let newarr = []
const _flatten = arr => {
// 补全代码
let i = 0;
while(i < arr.length) {
if (Array.isArray(arr[i])) {
_flatten(arr[i])
} else {
newarr.push(arr[i])
}
i++
}
return newarr
}
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