js将一个数组分成多个数组

1,将数组array分成长度为subGroupLength的小数组并返回新数组

  function  group(array, subGroupLength) {
     let index = 0;
     let newArray = [];
     while(index < array.length) {
        newArray.push(array.slice(index, index += subGroupLength));
     }
     return newArray;
 }

2,例如：

    var Array = [1,2,3,4,5,6,7,8,9,10,11,12];;
    var groupedArray = group(Array, 6);

得到的groupedArray 数组为：
groupedArray[[1,2,3,4,5,6],[7,8,9,10,11,12]]