js 数组分隔为二维数组

            /**
             * 分割数组创建二维数组封装
             * @param data 数组
             * @param senArrLen 需要分割成子数组的长度
             */
            splitArr(data, senArrLen) {
                //处理成len个一组的数据
                let data_len = data.length;
                let arrOuter_len = data_len % senArrLen === 0 ? data_len / senArrLen : parseInt((data_len /
                    senArrLen) + '') + 1;
                let arrSec_len = data_len > senArrLen ? senArrLen : data_len; //内层数组的长度
                let arrOuter = new Array(arrOuter_len); //最外层数组
                let arrOuter_index = 0; //外层数组的子元素下标
                // console.log(data_len % len);
                for (let i = 0; i < data_len; i++) {
                    if (i % senArrLen === 0) {
                        arrOuter_index++;
                        let len = arrSec_len * arrOuter_index;
                        //将内层数组的长度最小取决于数据长度对len取余，平时最内层由下面赋值决定
                        arrOuter[arrOuter_index - 1] = new Array(data_len % senArrLen);
                        if (arrOuter_index === arrOuter_len) //最后一组
                            data_len % senArrLen === 0 ?
                            len = data_len % senArrLen + senArrLen * arrOuter_index :
                            len = data_len % senArrLen + senArrLen * (arrOuter_index - 1);
                        let arrSec_index = 0; //第二层数组的索引
                        for (let k = i; k < len; k++) { //第一层数组的开始取决于第二层数组长度*当前第一层的索引
                            arrOuter[arrOuter_index - 1][arrSec_index] = data[k];
                            arrSec_index++;
                        }
                    }
                }
                console.log(arrOuter);
            },