javascript将一维数组转为二维数组的封装函数

    /*将一维数组转为二维数组
     *arr，一维数组；
     *split，分割位数;
     */
    function transArr(arr, split) {
        var newArr = [];
        var len = arr.length;
        for (let i = 0, j = 0; i < len; i += split, j++) {
            newArr[j] = arr.splice(0, split);
        }
        console.log(newArr);
    }

   var arr = ['category', 'name', 'value', 'date', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15'];
    transArr(arr, 4);