前端面试之数组打平
作者:互联网
let arr = [1, 2, [3, 4, 5, [6, 7, 8], 9], 10, [11, 12]]; flatten1 = arr => arr.flat(Infinity) flatten2 = arr => arr.toString().split(',').map(item => Number(item)) flatten3 = arr => { while (arr.some(Array.isArray)) { arr = [].concat(...arr); } return arr } flatten4 = arr => { return arr.reduce((result, item) => { return result.concat(Array.isArray(item) ? flatten4(item) : item) }, []) }
标签:isArray,arr,return,item,打平,flatten4,面试,result,数组 来源: https://www.cnblogs.com/flamestudio/p/12272202.html