如何采用子阵列，并将其展平为父阵列？

Question

parent = ["A","B","C",["a","b", "c", "d"], "D"]

parent.each do |children|

if children.is_a?

children.flatten # how do i insert it back to parent
# so that this loop can continue looping through the remainder
#including the newly flattened children(a,b,c,d)

end

end

问题是，一旦发现一个数组，我就会将它展平，然后需要将它插入到原始父数组中，这样A，B，C，a，b，c，d，D就会被循环一次。

Answer 1

从描述中可以看出你能够做到

parent.flatten.each do |child|
end