The second is an iteration process that applies the nested map to each of the elements of the input array.

第二个是迭代过程，将嵌套映射应用于输入数组的每个元素。

youdao

The second is an iteration process that applies the nested map to each of the elements of the input array.

第二个是迭代过程，将嵌套映射应用于输入数组的每个元素。

youdao