题解 | #数组扁平化#
数组扁平化
https://www.nowcoder.com/practice/5d7e0cf4634344c98e6ae4eaa2336bed
return arr.reduce(function(pre, cur){ console.log(cur) return pre.concat(Array.isArray(cur) ? _flatten(cur) : cur) }, [])
数组扁平化
https://www.nowcoder.com/practice/5d7e0cf4634344c98e6ae4eaa2336bed
return arr.reduce(function(pre, cur){ console.log(cur) return pre.concat(Array.isArray(cur) ? _flatten(cur) : cur) }, [])
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