?將dart數(shù)組按照指定的長度分割，返回一個(gè)二維數(shù)組，實(shí)現(xiàn)list的split功能.

?```

?eg:

?源數(shù)組：a?=?[0,?1,?2,?3,?4,?5,?6,?7,?8,?9,?10,?11,?12,?13,?14,?15,?16,?17,?18,?19]

splitList(a,?6):[[0,?1,?2,?3,?4,?5],?[6,?7,?8,?9,?10,?11],?[12,?13,?14,?15,?16,?17],?[18,?19]]

?```

代碼如下：

```dart

static?List<List<T>>?splitList<T>(List<T>?list,?int?len)?{

????if?(len?<=?1)?{

??????return?[list];

????}

????List<List<T>>?result?=?List();

????int?index?=?1;

????while?(true)?{

??????if?(index?*?len?<?list.length)?{

????????List<T>?temp?=?list.skip((index?-?1)?*?len).take(len).toList();

????????result.add(temp);

????????index++;

????????continue;

??????}

??????List<T>?temp?=?list.skip((index?-?1)?*?len).toList();

??????result.add(temp);

??????break;

????}

????return?result;

??}

```