js数组切片最优解，js一维数组一步到二维数组打字稿版本函数arrReduceWidthNumber(arr:any[],count:number){returnarr.reduce((sum:any[],item:any,index:number,arr:string[])=>{constcurStep=arr.slice(sum.length*count,(sum.length+1)*count);if(!!curStep.length){sum.push(curStep);}returnsum;},[])}javascript版本函数arrReduceWidthNumber(arr,count){returnarr.reduce((sum,item,index,arr)=>{constcurStep=arr.slice(sum.length*count,(sum.length+1)*count);if(!!curStep.length){sum.push(curStep);}returnsum;},[])}demo(我试了很久，目前还没发现有什么副作用，欢迎采纳)
