js数组切片,js数组定制分组,js一维数组转二维数组一步到位——吕江民·日常随笔

js数组切片最优解,js一维数组转二维数组一步到位

typescript版本

function arrReduceWidthNumber(arr: any[], count: number){
    return arr.reduce((sum: any[], item: any, index: number, arr:string[])=>{
        const curStep = arr.slice(sum.length * count, (sum.length + 1) * count);
        if(!!curStep.length){
            sum.push(curStep);
        }
        return sum;
    },[])
}

javascript版本

function arrReduceWidthNumber(arr, count){
    return arr.reduce((sum, item, index, arr)=>{
        const curStep = arr.slice(sum.length * count, (sum.length + 1) * count);
        if(!!curStep.length){
            sum.push(curStep);
        }
        return sum;
    },[])
}

demo(本人试用许久，至今未发现任何副作用，请放心服用)